Thanks for your comments. I would say that all of this often misses the point of the consumer, so starting on positioning, many audiophiles usually drag the topic to to full room treatment. Yes. there is an ideal setup in which there is a room "dedicated" to audio. Think about a studio or an auditorium for speakers. You can have the speakers at an ideal position, throw in absorbers, diffusers etc, take measurements, have an ideal seating distance, listen at higher volumes, simply perfection. Then.. there is the living room. Everything is there, it is a home you share, there might be neighbors. Speakers arrive and the way you have arranged your living kind of dictates where the speakers should be. In this situation the room treatment is limited to curtains and a carpet perhaps. Just place your speakers, put them closer to the wall if that is what brings out certain personal preferences and pull them from the wall for the same personal reasons. Audio science and living rooms rarely add up in practical sense. Not to put aside that some living rooms sound great due to the way they are accidentally stuffed by items that help to reduce reverb. People with a cozy taste usually have an advantage above people who prefer sterile decoration (small bookshelves work around like a wonder in those, Bose anyone ;) ) But still leaps away from utopia. In other words, the average living rooms and auditoriums are a totally different ball game and that is not a problem. Just enjoy :)
Sorry, I don't mean to seem like the "turd in the punchbowl", but there's a certain laziness here that is unnecessarily excusing someone from more easily trying something out that IS KNOWN to work for a majority of environments. Screw the idealist of the "Audiophile" in this case, but don't ignore the effing science that already exists for everybody's benefit! Place as seems desirable, but don't forget that accuracy will be subject to SBIR, VERY SPECIFICALLY in ANY room! Better yet, MEASURE YOUR ROOM.
I've been watching most of your videos over the past year+. This video is one of the most helpful I've seen because of the amount of detail in which you answer the question and provide additional advice for. Thanks
I love this take! I also have been going crazy trying to balance, the 38% rule, my monitors manual suggestions, and the room modes in my room and that dang equilateral triangle. In the end I have this feeling I have sacrificed my stereo image and my hunch is that my bass response could be more accurate if I sat further back than 38 percent and widened my monitors. I think that will be my next experiment. Acoustics will make you lose sleep, but your take is refreshing and liberating.
Jesco, at 09:35 regarding the idea of the listening position at 87%, I've definitely seen advice that the speakers and your head should form an equilateral triangle. If the speakers are at two corners (at a distance S apart) and your head at the other, then the distance from your head to the line between the speakers (in an equilateral triangle) = (Sqrt(3)/2) * S, which is 0.866S, which is basically 87%. So the 87% undoubtedly comes from the equilateral triangle spacing idea.
For quite some time, I have been looking to educate myself more on this subject, in order to optimize my acoustics/listening position in my studio. This is by far some of the best content on this subject that i come across, subscribed, and can't wait to watch more of the stuff on your channel. Thanks for great content!
The "33% Rule" and "38% Rule" should no longer be used as suggestions. It's close but not accurate. 33% or 32.8% ONLY work in longer-length rooms. 38% is too close to the 4th harmonic null at 37.5%. The real listening position is at 39.6%. Why? Because it's exactly in between the 4th (37.5%) and 6th (41.7%) harmonic null. You have 37.5% + 41.7% / 2 = 39.6%. So if you are keeping your head in between the harmonic nulls, then your possible Listening Position options between harmonic nulls will always be the same in any room: 32.8%, 39.6%, or 45.8%. Use 45.8% in small-length rooms, 39.6% in medium-length rooms, and use 32.8% in longer-length rooms. Also, lay out your room in a CAD program so you can really see and understand where the room nulls land.
I would like to genuinely thank you, it’s hard to sift through all of the misinformation. Also, I appreciate you giving me a thorough explanation in a very respectful manner. I am tired of the Internet trolls giving me attitude for asking to be educated on something that I obviously don’t completely understand. Lol.
Hello, this is my experience after a lot of research: I applied the 38% rule in my room (small) and speakers properly placed (equilateral, next to the wall).Acoustic treatment (based on wood fiber with Air Flow Resistivity of 3000 kPa*s/m² )on first reflections and corner bass traps ( still missing the ceiling).In the theoretical ideal mixing position I cannot hear the bass, I have to move more towards the speakers or to the back of the room.For the low end I just reference with some bass heavy music in a position I can hear/feel the bass and adjust it on my music. The room sounds less live after treatment and that was checked by before and after measurements(sonar works calibrated mic and Room Eq Wizard). My room is not ideal shape/ dimension and it has a big window along the length in one of the sides of the room, covered with curtains and also partially by standing acoustic panels (2x 20cm depth each). I still have some modes that are not tackled and I had realistic expectations of what could be achieved in a small room, at the end of the day I think it’s very important to listen how a good mix sounds in the room specially the low end and reference mix.You have to FEEL the kick and bass, level match and adjust it in your mix. And also as I side note (and not very talked about), remember that you have to act on three things: 1. Room frequency response and ringing. 2.Loudspeakers with the most flat frequency response or using some eq correction on the speakers. 3.Equal Loudness Curves (aka Fletcher Munson), i.e. you have to mix always at the same and proper level ( to make correct mix decisions) for small rooms usually around 79db SPL. So basically the room, the speakers and you.
Loved your post. I am not setting up a studio but simply trying to understand better how to interpret all of the different opinions posted about the optimal placement for my stereo’s speakers. I appreciate your explanation as it was presented in a measured and rational way. I think I will try to relax a bit and just sit back and listen. A few placement modifications will no doubt result in my preferred positions. Thank you.
Interesting discussion. From what you're saying about optimizing first for stereo field, and ignoring boundary locations - I'm curious about a few things. If you have a rectangular room with parallel walls and materials on either side with the same reflection coefficient and acoustic properties - like many interior rooms of residential construction - then your stereo field is going to be fairly good. Especially if you treat primary reflection zones with broadband absorbers, which are cheap and easy to obtain. However, by ignoring speaker wall distance / boundary location - especially distance from the front wall - you now create an issue that you cannot easily solve with treatment or EQ. By not placing the speakers as tight to the front wall as possible, you create non-minimum phase interference which will totally compromise your low end. By placing monitors as close to the front wall as possible, you create a minimum-phase effect with the front wall loading, then easily shelf it down with a LF shelf in the monitor drive signal. Plus, many small monitors actually benefit from the front wall loading in LF. You cannot adequately compensate for non-minimum phase effects, even with adaptive digital EQ. So why create the problem in the first place? Perhaps I misunderstood your advice so I'd like to hear your response.
The "33% Rule" and "38% Rule" should no longer be used as suggestions. It's close but not accurate. 33% or 32.8% ONLY work in longer-length rooms. 38% is too close to the 4th harmonic null at 37.5%. The real listening position is at 39.6%. Why? Because it's exactly in between the 4th (37.5%) and 6th (41.7%) harmonic null. You have 37.5% + 41.7% / 2 = 39.6%. So if you are keeping your head in between the harmonic nulls, then your possible Listening Position options between harmonic nulls will always be the same in any room: 32.8%, 39.6%, or 45.8%. Use 45.8% in small-length rooms, 39.6% in medium-length rooms, and use 32.8% in longer-length rooms. Also, lay out your room in a CAD program so you can really see and understand where the room nulls land.
Thank you sir. You confirmed my intuition with more clarity than I could ever muster. I modelled my new room. Mucked around with placement algs and realised when experimenting that unless you account for furniture, instruments or that gat case in the corner these things are guides. The big lesson here I think is learn to use your ears and trust them:) Cheers mate!
Ignoring the speaker placement and optimizing on dampened principle i found more stereo image and improved low end responses and continue to find better speaker placements with very minimal incremental movements since I don’t have the capability of measuring speaker responses I just relied with my ears and continue to enjoy the music as I ventured further into my incremental experiments
Great topic. Context is sooo important! Always in my consultations I give the rough frame of the story before giving a certain advise. All the possible advise you can give is so much dependent on so many influencing factors.
From 11:20 on it's getting really interesting for me and You did a wonderful Job explaining this especially critical "Field" in Room/Listening Position Optimization. I experiment a lot with these Factors and beside basic room treatment (Corner Bass Traps, which where the biggest improvement yet) , these Positions alter the sound in my room drastically . 25sqm Tent ⛺ shaped room under the roof .... Very helpful ❤
The dip is not just due to boundary effect of rear wall. It’s also due to height of woofer above ground causing out of phase component cancelling direct sound. Speaker set up varies with design and field lobing in particular along with polar response. Controlled directivity speakers tend to have more of the direct sound and phase preserved and makes for easier positioning.
Great call on the boundary bit, I've always gone by that logic, but good to hear a pro say it.🙂 Boundary to me always seemed pointless to a degree because unless the room is infinite width, in my mind the dip just changes to a different frequency anyway.🤔
Рік тому+1
Vey interesting approach ! How can I do if I have a Subwoofer ? Using the subwoofer alone when I want to find my Low End Sweet Spot ? Thanks a lot
I always used to place my speakers at the room 5th and listener at the room 3rd in a small room Lol Now I'm wondering where I ever got that idea after revisiting these concepts 😆😆 In a small room this usually leaves you with a wonky layout with a lot of waste. 😅 Most important if speakers on the back wall is listening at a 3rd or 5th and staying away from that dead zone in the middle. Real good point about the imaging though 👍
Thanks for this video ❤❤ This is the answer of all my questions about the speaker bounty interference in my mixing room. But one thing is a big dip at around 2900 hz wich is obout -9db . Is it also coused by speaker bounty interference or it's becuse of no diffuser at all in my room ? My room is 248 W , 355 L and 250 H in cm.
Just use the Wilson Audio Setup Procedure (WASP), or the Sumiko Master Setup. Both optimize speaker position in your room with your existing furnishings.
I know one thing, everyone gets their front firing subwoofer placement wrong and always point them forward right next to their other speakers. Subwoofers work best sitting behind your system and the speaker of the sub should be at 90 degrees facing the wall about 12-16 inches away. A millisecond or two adjust (time alignment) behind with the other speakers and be amazed. One thing I do that most people do not, is set up my stereo in a corner. I take and use a corner of a room and bring the system out from it. This helps greatly reduce any chance of an out of phase signal to bounce off the wall across from your stereo and back into your "in Phase" signal. And room to put the sub behind the system. It does work.
Thanks Jesco, I've followed your procedures for finding the best spot for the listening position. It works well. I'm still working on my panels - more or less - based on your building bass traps course. This video is a very helpful deeper insight in how you deal with all these conflicting rules that You tube dishes out freely. It reminds me I need to spend time on optimising my stereo image when I get round to it.
Jesco, thank you for all your wonderful information, always super clear and concise. I've been trying to find alternative types of absorption material for making my panels, thinking on something more ecological, safer (even with the saran wrap I don't love the idea of having all those toxic materials in my bedroom) and affordable, where I live insulating materials like fiberglass or rockwool are very hard to find and when I do they're not the appropriate density and very expensive, I'm sure other people have this problem also. So far I've seen people try cement mixed with wood fibers, sawdust, coconut fibers, cotton, sheep wool, charcoal, perlite, cardboard, sand, feathers, cork, recycled paper, etc..., if possible I think many people would love to get your thoughts on these or other alternative absorbption materials that we can work with. Thanks a lot from Mexico!
Si puedes encontrar en alguna tienda "Geopannel", es lo más parecido en índice de absorción a la lana mineral, pero 100% ecológico (es fibra de algodón reciclado). He construído todas las trampas de graves de mi estudio así y funcionan perfectas, cuidando mis pulmones. Salud desde España
The best news in all this is that with modern equipment it's pretty hard to actually set up a bad room. All placement and treatment advice is arbitrary and will change from room to room, so there are no hard and fast rules... and, yes, it really is all about getting the stereo image right.
I heard of the 83% rule. Your speakers should be 83% apart from each other the distance the speaker is to your ear, so if your speakers are 7 ft apart then you should be 8 ft 5 in from your speakers. This is from a guy who set up thousands of stereo systems and wrote a book on it. I saw it on YT lately. It's suppose to be a "starting point" on speaker placement. It's called Jim Smith's Magic Formula. There's a thread on it at Steve Hoffman's discussion site.
Frequencies below the absorption coefficient are reflective when they encounter a poreus absorber not thicker than 1/8th of the wavelength against a masonry wall. A light wall will reflect less. A common gypsum wall will reflect like 10% on 100 Hz.
If my choices are speakers behind a flat screen tv (facing it's back), speakers angled around the tv, or speakers on a different plane than listener, what would you choose? Working in a small room with big tv and speakers. My guess is a toss up between 1 and 2.
A little off topic. When making slated acoustic absorption/ diffuser what frequencies should you target after measuring peaks and dips in your room? The peaks or dips ?
I'm assuming the original poster meant "no LESS than 24 inches" at the end of the first point? EDIT: My bad, it was correct. Still learning about SBIR. Your SonicScoop article was super helpful.
He said in a video about building a studio to not angle walls, as this is unpredictable. You know where you are with a rectangle, you can work out the nodes etc. If you are a maths genius, you could try angles all over the place and a studio i used to work in was angles everywhere, but otherwise, you have to be simply lucky for it to work.
I am going to install BOSE Free Space FS2SE, My room size is 20feet / 40 feet. As per BOSE manual first speaker should be place at ½ LSD from any corner of the room and Continue to place loudspeakers along the wall at LSD. Supported room width can be up to 2× LSD. How do i calculate LSD as per my room size ? Thanks
I need to have for example a sofa close behind me otherwise my speakers do not sound correct and I can’t work out why this is. If I have nothing behind me certain bass notes sound distorted. I suppose the answer is to fill your room with soft furnishings. Also Dolby recommend a reference listening position of 2/3 of your rooms length which seems to work well for me.
I have a very small room with the closet doors missing. The previous owners took them because I found that the width of the closet isn't standard so they were custom built. All I have is a curtain there. I feel really discouraged to even attempt to treat my room so my mixes suffer
In case of a asimmetric room, would you rather have a big window on one of your sides or on the front or back of the speakers? The room is rectangular and the window is on the short side
In another video, he said the best place for a window or door would be in the rear third of the room, on one of the side walls, because this part of the room has the least impact on your listening position.
I have always wonderd, if I was to build a studio from a contruction point of view, meaning, there is no room before I build a room.. what would you do in terms of shape of the room, materials, room measers, placement of desk and speakers,isolation, measers etc.? Would be a wonderfull video to watch. I am an EDM style producer that are looking to buy a plot in the future, but I am concerned about these things
He did a video, or maybe it was a newsletter on this very recently. In a nutshell, rectangular room, using a calculator for dimensions to get a balanced spread of nodes, using hard walls (brick etc). No windows if possible or otherwise put them on the side walls in rear third of the room.
What you say doesnt seem to match with the speaker placement recommendations on the Genelec site say. They recommend to avoid from 60cm to 1.1M (low Frequency effect) and to avoid less than 5cm (port).
Thanks Jesco, this is so helpful. I was hoping once you mentioned stereo imaging, you would touch upon some guidelines about the minimum or optimal distance between the speakers. My are now 110cm apart. Can someone comment more on that topic? Thanks.
Sounds about right for nearfields. You’ll find that the listening position will dictate the distance between monitors (to a degree) if you create an equilateral triangle
I think I just an unworkable situation that's too short from wall to wall. My polk speakers some how have 0 bass in my seating position, but if I walk behind the couch or forward of the seating position, the bass comes through. So I seem to be sitting in some sort of void where the bass reflection are literally canceling themselves out... But I can't move my seat position and moving the speakers closer or further from the wall makes little difference. It's kind of annoying. I just run a big long wire to my head sets now lol
The "33% Rule" and "38% Rule" should no longer be used as suggestions. It's close but not accurate. 33% or 32.8% ONLY work in longer-length rooms. 38% is too close to the 4th harmonic null at 37.5%. The real listening position is at 39.6%. Why? Because it's exactly in between the 4th (37.5%) and 6th (41.7%) harmonic null. You have 37.5% + 41.7% / 2 = 39.6%. So if you are keeping your head in between the harmonic nulls, then your possible Listening Position options between harmonic nulls will always be the same in any room: 32.8%, 39.6%, or 45.8%. Use 45.8% in small-length rooms, 39.6% in medium-length rooms, and use 32.8% in longer-length rooms. Also, lay out your room in a CAD program so you can really see and understand where the room nulls land.
I wish I saw this earlier. I have been positioning my speakers and listening position with a microphone and Behringer deq 2496 room correction, for more than a week. My room is 6.31 to 4.21 meters and found out the best listening position balance (which is not the ideal still, 10db nulls at 125 - 250hz area but better than any other places) in 288cm from back wall which exactly happens to be your %45,8 suggestion. I’m surprised…
@@radioXxXheadXxXfever 7.93 meters... Wow, that's an extra long room! Looking at my CAD drawing and mapping out the room modes, it's showing your ideal Listening Position is between the 2nd and 5th nodes at 27.5%. The 2nd node frequency is 43 Hz and is at 25% from the front wall or 6'-6" (198 cm) from the front wall. The 5th node frequency is 109 Hz and is at 30% from the front wall or 7'-9 3/4" (238 cm) from the front wall. So sitting in between those two nodes = 25% + 30% / 2 = 27.5%. At 27.5% of the room length your Listening Position will be located at 7'-2" (218 cm) from the front wall.
@@radioXxXheadXxXfever Yes, for sure. It's an extra long room so it's even less than 32.8%. At a length of 7.93 meters = 312.2047 inches or 26'-0 3/16" your ideal Listening position will be located between the 2nd and 5th nodes at 27.5%.
I notice that you keep talking about studio acoustics and not stereo listening room acoustics. Would the same principles apply in a typical audiophile listening room?
Yep. The Room Mode vs SBIR issue is dependent on many things, including what Andre Vare referred to as "Invisible Alpha" (unconceived absorption), i.e. - the degree to which the very lowest frequencies will be driven right through all but the stiffest of boundaries (unless heroic amounts of LF Absorption is employed). VPR's have great effect in these lower ranges because they become in effect "mini-walls" with lots of absorption, multiplying the efficiency of the Volume vs. Gas Flow Resistance vs. Absorption equation, especially at a practical Resonance Peak of approx. 50Hz. Regardless, the biggest issue for smaller budget Producers is how to prioritize their budgets. The good news is that already completed science is cheaper than they can afford to ignore! Before more expensive equipment or plugins... even Room Correction EQ.... consider some things about Acoustics than can be achieved with sweat equity better than more money that still won't affect the bottom line - how you hear things in your own space! That's the thing most people can LEAST afford to change easily. 🤔
The "33% Rule" and "38% Rule" should no longer be used as suggestions. They are close but not accurate because it depends on the ROOM LENGTH. 33% or 32.8% ONLY work in longer-length rooms. 38% is too close to the 4th harmonic null at 37.5%. The real listening position is at 39.6%. Why? Because it's exactly in between the 4th (37.5%) and 6th (41.7%) harmonic null. You have 37.5% + 41.7% / 2 = 39.6%. So if you are keeping your head in between the harmonic nulls, then your possible Listening Position options between harmonic nulls will always be the same in any room: 32.8%, 39.6%, or 45.8%. Use 45.8% in small-length rooms, 39.6% in medium-length rooms, and use 32.8% in longer-length rooms. Also, lay out your room in a CAD program so you can really see and understand where the room nulls land.
This just exposed that dsp alignment other than the center of the room is incorrect..because the reflected signals dont return correctly.. he is totally correct
Used the speaker manual that gave min max distances, then tried to get that as a start and LISTEN. A lot ;-) Experimenting gave me a huge difference in sound (stage). Every room is different.... to be fair, this is a livingroom hifi, not a studio
Nice video. Sound interacts with everything. Too many variables. Experimentation is required. Practicality can also limit where you can place your speakers or find an optimal listening position. So you can't realistically follow every rule or guideline. 😉
You place a single speaker in the corner of the room to find the best listening position in the room, listening to the bass only. If you move that speaker to another part of the room, the best listening position in terms of bass accuracy should still be the same place. You then try to place your speakers in relation to that monitoring position. This is my understanding of it anyway, but happy to be told I'm wrong.
More than 24" ? Or should that be no less than ...... 24" from baffle to front wall, gives just over 3 ml secs reflection, which I think blurs the sound stage depth. Best if the front wall is treated with diffusion (possibly quadratic diffusers) and having front baffle at least 3 feet from front wall (5 ml secs reflection, minimum so that reflection does not interfer with direct sound). I have a treated stereo listening room ( not a studio) where I have my speakers 4.5 feet from front wall (room is 28 feet long, 12.5 wide), and find this gives best stereo image and soundstage . I think most don't realize how pulling speakers out from the front wall can really help with soundstage depth and stereo image. But then again, trust your ears ..... takes but a few minutes to move speakers around and try.
Everything about my set up is non ideal. Room shape. My screens vs monitors. Multi use studio. So I just had to do the best I could to get an even sound.
So, w a pair of CV SL-15 I ot to have spkrs 15 feet apart and me being 15 feet back and the tweeters at ear level. I can easily her the music go from 1 spkr to the other and separation the room has 2 stuffed chairs and large tapestries, a vaulted ceiling and carpeted floor .spkrs a few inches from the wall. I do think that 2/3rds of stereo budget ot to be on spkrs. A thousan' $ receiver or amp and hundred $ spkrs won't sound good but a 1k$ pr of spkrs and a decent rcvr say an sx650 pushing 35wpc would sound damn nice.
There are rules and then there are no Rules except move stuff around and try different placements and listening positions.. You have to play around to find the sweet spot for everything.
You know what? If you are an Audioholic or just someone who takes listening to music or media seriously well then good for you. Lucky there are thousands of times more of us that regard audio on a lesser level of importance. We have a room that we may do something else entirely in like other hobbies or something of a more social, if not domestic nature. For us Music and Media is just a nice addition. Not necessarily carried to any extreme but just an additional dimension. We are not going to put sound dampeners on the walls and ceilings we are not going to rearrange our populated room. I guess this video just wasnt for me.
Your statement about the distance to mix in ANY room is bullshit as well. It is FALSE. Room acoustics is NOT about hypotheses or "theories" it is physics. I agree with you about the woofer size vs distance. It's bullshit as well. 1. You should pay attention to the equilateral triangle 2. Your listening position must be (not a recommendation!) 0.375 times the length of the room. PERIOD. 3. You must pay close attention to room modes and their balance in the room
@JHBrandt I disagree as does Wilson Audio and their WASP method. Have you heard of it? Depending on so many variables I'm not about to list, your demand of .375 is not scientific in the least. There's no universal psychoacoustic law that would validate or substantiate that claim.
Best advice is no advice 😂Place your Speaker and Listen to them ,move them Till you find your Best Sound. You don’t need advice . Your ears are your ears and your room is your Room. No one can Tell you Whats Right for you.
Thanks for your comments. I would say that all of this often misses the point of the consumer, so starting on positioning, many audiophiles usually drag the topic to to full room treatment.
Yes. there is an ideal setup in which there is a room "dedicated" to audio. Think about a studio or an auditorium for speakers. You can have the speakers at an ideal position, throw in absorbers, diffusers etc, take measurements, have an ideal seating distance, listen at higher volumes, simply perfection.
Then.. there is the living room. Everything is there, it is a home you share, there might be neighbors. Speakers arrive and the way you have arranged your living kind of dictates where the speakers should be. In this situation the room treatment is limited to curtains and a carpet perhaps.
Just place your speakers, put them closer to the wall if that is what brings out certain personal preferences and pull them from the wall for the same personal reasons. Audio science and living rooms rarely add up in practical sense. Not to put aside that some living rooms sound great due to the way they are accidentally stuffed by items that help to reduce reverb. People with a cozy taste usually have an advantage above people who prefer sterile decoration (small bookshelves work around like a wonder in those, Bose anyone ;) ) But still leaps away from utopia. In other words, the average living rooms and auditoriums are a totally different ball game and that is not a problem. Just enjoy :)
Sorry, I don't mean to seem like the "turd in the punchbowl", but there's a certain laziness here that is unnecessarily excusing someone from more easily trying something out that IS KNOWN to work for a majority of environments. Screw the idealist of the "Audiophile" in this case, but don't ignore the effing science that already exists for everybody's benefit! Place as seems desirable, but don't forget that accuracy will be subject to SBIR, VERY SPECIFICALLY in ANY room! Better yet, MEASURE YOUR ROOM.
I've been watching most of your videos over the past year+. This video is one of the most helpful I've seen because of the amount of detail in which you answer the question and provide additional advice for. Thanks
your videos are exceedingly helpful and this one is no different! Great information meticulously detailed! Thank you
I love this take! I also have been going crazy trying to balance, the 38% rule, my monitors manual suggestions, and the room modes in my room and that dang equilateral triangle. In the end I have this feeling I have sacrificed my stereo image and my hunch is that my bass response could be more accurate if I sat further back than 38 percent and widened my monitors. I think that will be my next experiment. Acoustics will make you lose sleep, but your take is refreshing and liberating.
Jesco, at 09:35 regarding the idea of the listening position at 87%, I've definitely seen advice that the speakers and your head should form an equilateral triangle. If the speakers are at two corners (at a distance S apart) and your head at the other, then the distance from your head to the line between the speakers (in an equilateral triangle) = (Sqrt(3)/2) * S, which is 0.866S, which is basically 87%. So the 87% undoubtedly comes from the equilateral triangle spacing idea.
Home theater enthusiast here. Glad I found this channel. Well presented and digestible. Liked and subscribed
For quite some time, I have been looking to educate myself more on this subject, in order to optimize my acoustics/listening position in my studio. This is by far some of the best content on this subject that i come across, subscribed, and can't wait to watch more of the stuff on your channel. Thanks for great content!
O great contentmaker, this is content is so great
The "33% Rule" and "38% Rule" should no longer be used as suggestions. It's close but not accurate. 33% or 32.8% ONLY work in longer-length rooms. 38% is too close to the 4th harmonic null at 37.5%. The real listening position is at 39.6%. Why? Because it's exactly in between the 4th (37.5%) and 6th (41.7%) harmonic null. You have 37.5% + 41.7% / 2 = 39.6%. So if you are keeping your head in between the harmonic nulls, then your possible Listening Position options between harmonic nulls will always be the same in any room: 32.8%, 39.6%, or 45.8%. Use 45.8% in small-length rooms, 39.6% in medium-length rooms, and use 32.8% in longer-length rooms. Also, lay out your room in a CAD program so you can really see and understand where the room nulls land.
Well explained and much appreciated. It ties in well with LINN's recommended "Tune-Dem" methodology for speaker position optimisation
I would like to genuinely thank you, it’s hard to sift through all of the misinformation.
Also, I appreciate you giving me a thorough explanation in a very respectful manner.
I am tired of the Internet trolls giving me attitude for asking to be educated on something that I obviously don’t completely understand. Lol.
Hello, this is my experience after a lot of research:
I applied the 38% rule in my room (small) and speakers properly placed (equilateral, next to the wall).Acoustic treatment (based on wood fiber with Air Flow Resistivity of 3000 kPa*s/m² )on first reflections and corner bass traps ( still missing the ceiling).In the theoretical ideal mixing position I cannot hear the bass, I have to move more towards the speakers or to the back of the room.For the low end I just reference with some bass heavy music in a position I can hear/feel the bass and adjust it on my music.
The room sounds less live after treatment and that was checked by before and after measurements(sonar works calibrated mic and Room Eq Wizard).
My room is not ideal shape/ dimension and it has a big window along the length in one of the sides of the room, covered with curtains and also partially by standing acoustic panels (2x 20cm depth each).
I still have some modes that are not tackled and I had realistic expectations of what could be achieved in a small room, at the end of the day I think it’s very important to listen how a good mix sounds in the room specially the low end and reference mix.You have to FEEL the kick and bass, level match and adjust it in your mix.
And also as I side note (and not very talked about), remember that you have to act on three things:
1. Room frequency response and ringing.
2.Loudspeakers with the most flat frequency response or using some eq correction on the speakers.
3.Equal Loudness Curves (aka Fletcher Munson), i.e. you have to mix always at the same and proper level ( to make correct mix decisions) for small rooms usually around 79db SPL.
So basically the room, the speakers and you.
Loved your post. I am not setting up a studio but simply trying to understand better how to interpret all of the different opinions posted about the optimal placement for my stereo’s speakers. I appreciate your explanation as it was presented in a measured and rational way. I think I will try to relax a bit and just sit back and listen. A few placement modifications will no doubt result in my preferred positions. Thank you.
Interesting discussion. From what you're saying about optimizing first for stereo field, and ignoring boundary locations - I'm curious about a few things. If you have a rectangular room with parallel walls and materials on either side with the same reflection coefficient and acoustic properties - like many interior rooms of residential construction - then your stereo field is going to be fairly good. Especially if you treat primary reflection zones with broadband absorbers, which are cheap and easy to obtain.
However, by ignoring speaker wall distance / boundary location - especially distance from the front wall - you now create an issue that you cannot easily solve with treatment or EQ. By not placing the speakers as tight to the front wall as possible, you create non-minimum phase interference which will totally compromise your low end. By placing monitors as close to the front wall as possible, you create a minimum-phase effect with the front wall loading, then easily shelf it down with a LF shelf in the monitor drive signal. Plus, many small monitors actually benefit from the front wall loading in LF.
You cannot adequately compensate for non-minimum phase effects, even with adaptive digital EQ. So why create the problem in the first place? Perhaps I misunderstood your advice so I'd like to hear your response.
The "33% Rule" and "38% Rule" should no longer be used as suggestions. It's close but not accurate. 33% or 32.8% ONLY work in longer-length rooms. 38% is too close to the 4th harmonic null at 37.5%. The real listening position is at 39.6%. Why? Because it's exactly in between the 4th (37.5%) and 6th (41.7%) harmonic null. You have 37.5% + 41.7% / 2 = 39.6%. So if you are keeping your head in between the harmonic nulls, then your possible Listening Position options between harmonic nulls will always be the same in any room: 32.8%, 39.6%, or 45.8%. Use 45.8% in small-length rooms, 39.6% in medium-length rooms, and use 32.8% in longer-length rooms. Also, lay out your room in a CAD program so you can really see and understand where the room nulls land.
Thank you sir. You confirmed my intuition with more clarity than I could ever muster. I modelled my new room. Mucked around with placement algs and realised when experimenting that unless you account for furniture, instruments or that gat case in the corner these things are guides. The big lesson here I think is learn to use your ears and trust them:) Cheers mate!
Everything explained very well. Best acoustics info and tips on the web from this guy. Great channel.
Ignoring the speaker placement and optimizing on dampened principle i found more stereo image and improved low end responses and continue to find better speaker placements with very minimal incremental movements since I don’t have the capability of measuring speaker responses I just relied with my ears and continue to enjoy the music as I ventured further into my incremental experiments
Fantastic video mate. Do u have a video that talks about how to treat the wall behind your studio monitors?
outstanding as usual
Great topic. Context is sooo important! Always in my consultations I give the rough frame of the story before giving a certain advise.
All the possible advise you can give is so much dependent on so many influencing factors.
From 11:20 on it's getting really interesting for me and You did a wonderful Job explaining this especially critical "Field" in Room/Listening Position Optimization.
I experiment a lot with these Factors and beside basic room treatment (Corner Bass Traps, which where the biggest improvement yet)
, these Positions alter the sound in my room drastically . 25sqm Tent ⛺ shaped room under the roof ....
Very helpful ❤
The dip is not just due to boundary effect of rear wall. It’s also due to height of woofer above ground causing out of phase component cancelling direct sound.
Speaker set up varies with design and field lobing in particular along with polar response. Controlled directivity speakers tend to have more of the direct sound and phase preserved and makes for easier positioning.
Great call on the boundary bit, I've always gone by that logic, but good to hear a pro say it.🙂
Boundary to me always seemed pointless to a degree because unless the room is infinite width, in my mind the dip just changes to a different frequency anyway.🤔
Vey interesting approach ! How can I do if I have a Subwoofer ? Using the subwoofer alone when I want to find my Low End Sweet Spot ? Thanks a lot
I always used to place my speakers at the room 5th and listener at the room 3rd in a small room Lol Now I'm wondering where I ever got that idea after revisiting these concepts 😆😆 In a small room this usually leaves you with a wonky layout with a lot of waste. 😅 Most important if speakers on the back wall is listening at a 3rd or 5th and staying away from that dead zone in the middle. Real good point about the imaging though 👍
Thanks for this video ❤❤
This is the answer of all my questions about the speaker bounty interference in my mixing room.
But one thing is a big dip at around 2900 hz wich is obout -9db . Is it also coused by speaker bounty interference or it's becuse of no diffuser at all in my room ?
My room is 248 W , 355 L and 250 H in cm.
Just use the Wilson Audio Setup Procedure (WASP), or the Sumiko Master Setup.
Both optimize speaker position in your room with your existing furnishings.
I know one thing, everyone gets their front firing subwoofer placement wrong and always point them forward right next to their other speakers. Subwoofers work best sitting behind your system and the speaker of the sub should be at 90 degrees facing the wall about 12-16 inches away. A millisecond or two adjust (time alignment) behind with the other speakers and be amazed. One thing I do that most people do not, is set up my stereo in a corner. I take and use a corner of a room and bring the system out from it. This helps greatly reduce any chance of an out of phase signal to bounce off the wall across from your stereo and back into your "in Phase" signal. And room to put the sub behind the system. It does work.
Thanks Jesco, I've followed your procedures for finding the best spot for the listening position. It works well. I'm still working on my panels - more or less - based on your building bass traps course. This video is a very helpful deeper insight in how you deal with all these conflicting rules that You tube dishes out freely. It reminds me I need to spend time on optimising my stereo image when I get round to it.
Really really good explanation. Thank you!
Jesco, thank you for all your wonderful information, always super clear and concise.
I've been trying to find alternative types of absorption material for making my panels, thinking on something more ecological, safer (even with the saran wrap I don't love the idea of having all those toxic materials in my bedroom) and affordable, where I live insulating materials like fiberglass or rockwool are very hard to find and when I do they're not the appropriate density and very expensive, I'm sure other people have this problem also. So far I've seen people try cement mixed with wood fibers, sawdust, coconut fibers, cotton, sheep wool, charcoal, perlite, cardboard, sand, feathers, cork, recycled paper, etc..., if possible I think many people would love to get your thoughts on these or other alternative absorbption materials that we can work with. Thanks a lot from Mexico!
Si puedes encontrar en alguna tienda "Geopannel", es lo más parecido en índice de absorción a la lana mineral, pero 100% ecológico (es fibra de algodón reciclado). He construído todas las trampas de graves de mi estudio así y funcionan perfectas, cuidando mis pulmones. Salud desde España
@@rodericogarcia muchísimas gracias, Rodrigo, voy a investigar al respecto, ¡saludos!
Second hand clothes or wool home insulation would be good options. Staple in a wooden frame and cover with burlap.
Great videos as always! Thanks Jesco!
Thank you so much! Love your channel and all the information given throughout this video, big up! 🔥
Hello my friend! This is great information you’ve provided! I’m gonna head over to your website for the free workshop. Thank you 🙏
👍🏼Thank You sir. Trust our ears and enjoy the Music! 🎵😎
Great video thanks
Thank you
The 5 paths to a good image (for me).
A good room.
A good source.
A good amp.
Speakers that are point source and dipole.
Speaker placement.
The best news in all this is that with modern equipment it's pretty hard to actually set up a bad room. All placement and treatment advice is arbitrary and will change from room to room, so there are no hard and fast rules... and, yes, it really is all about getting the stereo image right.
I heard of the 83% rule. Your speakers should be 83% apart from each other the distance the speaker is to your ear, so if your speakers are 7 ft apart then you should be 8 ft 5 in from your speakers. This is from a guy who set up thousands of stereo systems and wrote a book on it. I saw it on YT lately. It's suppose to be a "starting point" on speaker placement. It's called Jim Smith's Magic Formula. There's a thread on it at Steve Hoffman's discussion site.
%38 or 83 ?
Frequencies below the absorption coefficient are reflective when they encounter a poreus absorber not thicker than 1/8th of the wavelength against a masonry wall. A light wall will reflect less. A common gypsum wall will reflect like 10% on 100 Hz.
But surely the bass will pass through that gypsum, hit the hard masonry and then reflect back into the room?
@@KaneDWilliams Some of the bass will pass through and some of it will be reflected. How much is reflected is determined by the mass of the wall.
Appreciate your videos mate
If my choices are speakers behind a flat screen tv (facing it's back), speakers angled around the tv, or speakers on a different plane than listener, what would you choose? Working in a small room with big tv and speakers. My guess is a toss up between 1 and 2.
A little off topic. When making slated acoustic absorption/ diffuser what frequencies should you target after measuring peaks and dips in your room? The peaks or dips ?
I'm assuming the original poster meant "no LESS than 24 inches" at the end of the first point?
EDIT: My bad, it was correct. Still learning about SBIR. Your SonicScoop article was super helpful.
One thing I learn from Jesco is that Acoustics is an incredibly complex subject, far beyond what our intuition might tell us.
I am building my studio from scratch, should I build parallel walls? Or should i angle them? Thx
He said in a video about building a studio to not angle walls, as this is unpredictable. You know where you are with a rectangle, you can work out the nodes etc. If you are a maths genius, you could try angles all over the place and a studio i used to work in was angles everywhere, but otherwise, you have to be simply lucky for it to work.
I am going to install BOSE Free Space FS2SE, My room size is 20feet / 40 feet. As per BOSE manual first speaker should be place at ½ LSD from any corner of the room and Continue to place loudspeakers along the wall at LSD. Supported room width can be up to 2× LSD. How do i calculate LSD as per my room size ? Thanks
I need to have for example a sofa close behind me otherwise my speakers do not sound correct and I can’t work out why this is. If I have nothing behind me certain bass notes sound distorted. I suppose the answer is to fill your room with soft furnishings. Also Dolby recommend a reference listening position of 2/3 of your rooms length which seems to work well for me.
Thank you 🙏
I have a very small room with the closet doors missing. The previous owners took them because I found that the width of the closet isn't standard so they were custom built. All I have is a curtain there. I feel really discouraged to even attempt to treat my room so my mixes suffer
The situation could be good. The closets might make good bass traps.
@@robertyoung1777 true I have a lot of things in there. My room basically has little to no reverb.
In case of a asimmetric room, would you rather have a big window on one of your sides or on the front or back of the speakers? The room is rectangular and the window is on the short side
In another video, he said the best place for a window or door would be in the rear third of the room, on one of the side walls, because this part of the room has the least impact on your listening position.
Great video as always! Just noticed the phantom speaker test link sent to my email does not seem to be working.
I have always wonderd, if I was to build a studio from a contruction point of view, meaning, there is no room before I build a room.. what would you do in terms of shape of the room, materials, room measers, placement of desk and speakers,isolation, measers etc.? Would be a wonderfull video to watch.
I am an EDM style producer that are looking to buy a plot in the future, but I am concerned about these things
He did a video, or maybe it was a newsletter on this very recently. In a nutshell, rectangular room, using a calculator for dimensions to get a balanced spread of nodes, using hard walls (brick etc). No windows if possible or otherwise put them on the side walls in rear third of the room.
What you say doesnt seem to match with the speaker placement recommendations on the Genelec site say. They recommend to avoid from 60cm to 1.1M (low Frequency effect) and to avoid less than 5cm (port).
For me it was very fast clear that all this rules will be a compromise anyway. To know all the Rulesd will help to find the right Compromise for you.
Thanks Jesco, this is so helpful. I was hoping once you mentioned stereo imaging, you would touch upon some guidelines about the minimum or optimal distance between the speakers. My are now 110cm apart. Can someone comment more on that topic? Thanks.
Sounds about right for nearfields. You’ll find that the listening position will dictate the distance between monitors (to a degree) if you create an equilateral triangle
I would definitely use the Phantom Speaker Test that Jesco mentions at the end of the video. I found that very useful for speaker placement.
Thanks! It's actually 120cm between tweeters of my HS5 monitors. And they are 10cm away from the front wall.
Can Hedd type 20 and Sub flat mount to the wall? Do they design for use like that?
Thanks for understanding the concerns of amateur home studio builders.. This was really helpfull
I think I just an unworkable situation that's too short from wall to wall. My polk speakers some how have 0 bass in my seating position, but if I walk behind the couch or forward of the seating position, the bass comes through. So I seem to be sitting in some sort of void where the bass reflection are literally canceling themselves out... But I can't move my seat position and moving the speakers closer or further from the wall makes little difference. It's kind of annoying. I just run a big long wire to my head sets now lol
Great info in your vids. The swallowing noises can get to be a bit much though…
The "33% Rule" and "38% Rule" should no longer be used as suggestions. It's close but not accurate. 33% or 32.8% ONLY work in longer-length rooms. 38% is too close to the 4th harmonic null at 37.5%. The real listening position is at 39.6%. Why? Because it's exactly in between the 4th (37.5%) and 6th (41.7%) harmonic null. You have 37.5% + 41.7% / 2 = 39.6%. So if you are keeping your head in between the harmonic nulls, then your possible Listening Position options between harmonic nulls will always be the same in any room: 32.8%, 39.6%, or 45.8%. Use 45.8% in small-length rooms, 39.6% in medium-length rooms, and use 32.8% in longer-length rooms. Also, lay out your room in a CAD program so you can really see and understand where the room nulls land.
I wish I saw this earlier. I have been positioning my speakers and listening position with a microphone and Behringer deq 2496 room correction, for more than a week. My room is 6.31 to 4.21 meters and found out the best listening position balance (which is not the ideal still, 10db nulls at 125 - 250hz area but better than any other places) in 288cm from back wall which exactly happens to be your %45,8 suggestion. I’m surprised…
my room is 7.93 meters x 3.96 meters. 3.96 meters is front wall. I don't have a CAD program, what % position do you recommend?
does my room classify as "longer-length"?
@@radioXxXheadXxXfever 7.93 meters... Wow, that's an extra long room! Looking at my CAD drawing and mapping out the room modes, it's showing your ideal Listening Position is between the 2nd and 5th nodes at 27.5%. The 2nd node frequency is 43 Hz and is at 25% from the front wall or 6'-6" (198 cm) from the front wall. The 5th node frequency is 109 Hz and is at 30% from the front wall or 7'-9 3/4" (238 cm) from the front wall. So sitting in between those two nodes = 25% + 30% / 2 = 27.5%. At 27.5% of the room length your Listening Position will be located at 7'-2" (218 cm) from the front wall.
@@radioXxXheadXxXfever Yes, for sure. It's an extra long room so it's even less than 32.8%. At a length of 7.93 meters = 312.2047 inches or 26'-0 3/16" your ideal Listening position will be located between the 2nd and 5th nodes at 27.5%.
I notice that you keep talking about studio acoustics and not stereo listening room acoustics. Would the same principles apply in a typical audiophile listening room?
I wonder? Does any of this apply to wall mounted speakers?
you are a smart person
Fantastic 👍
Yep. The Room Mode vs SBIR issue is dependent on many things, including what Andre Vare referred to as "Invisible Alpha" (unconceived absorption), i.e. - the degree to which the very lowest frequencies will be driven right through all but the stiffest of boundaries (unless heroic amounts of LF Absorption is employed). VPR's have great effect in these lower ranges because they become in effect "mini-walls" with lots of absorption, multiplying the efficiency of the Volume vs. Gas Flow Resistance vs. Absorption equation, especially at a practical Resonance Peak of approx. 50Hz.
Regardless, the biggest issue for smaller budget Producers is how to prioritize their budgets. The good news is that already completed science is cheaper than they can afford to ignore! Before more expensive equipment or plugins... even Room Correction EQ.... consider some things about Acoustics than can be achieved with sweat equity better than more money that still won't affect the bottom line - how you hear things in your own space! That's the thing most people can LEAST afford to change easily. 🤔
Is there any actually any rule/guideline at all for distance between your speakers?
Thumbs up for the thumbnail!!!
is it normal when I move my head within the triangle sweetspot (head position) back and forward that the sound is changing? It drives me crazy.
SBIR can also happen because of the floor.
I heard about this 38% "guideline" first from Ethan Winer - not sure if that is who you were thinking of?
The "33% Rule" and "38% Rule" should no longer be used as suggestions. They are close but not accurate because it depends on the ROOM LENGTH. 33% or 32.8% ONLY work in longer-length rooms. 38% is too close to the 4th harmonic null at 37.5%. The real listening position is at 39.6%. Why? Because it's exactly in between the 4th (37.5%) and 6th (41.7%) harmonic null. You have 37.5% + 41.7% / 2 = 39.6%. So if you are keeping your head in between the harmonic nulls, then your possible Listening Position options between harmonic nulls will always be the same in any room: 32.8%, 39.6%, or 45.8%. Use 45.8% in small-length rooms, 39.6% in medium-length rooms, and use 32.8% in longer-length rooms. Also, lay out your room in a CAD program so you can really see and understand where the room nulls land.
@@andynonimuss6298 What is your definition of "medium-length" or "longer"?
your homepage is garbage its not working , i signed up like 3 times, still no link for the phantom speaker positioning pdf
This just exposed that dsp alignment other than the center of the room is incorrect..because the reflected signals dont return correctly.. he is totally correct
Cheers Jesco,, 🍻😎👍👍
How to get accurate transient response in a small room
Used the speaker manual that gave min max distances, then tried to get that as a start and LISTEN. A lot ;-)
Experimenting gave me a huge difference in sound (stage). Every room is different.... to be fair, this is a livingroom hifi, not a studio
I don’t want to be rude but all said in this video was flat out Voodoo. Just kidding, very scientific. Correct and helpful, thanks Jesco!
Nice video. Sound interacts with everything. Too many variables. Experimentation is required. Practicality can also limit where you can place your speakers or find an optimal listening position. So you can't realistically follow every rule or guideline. 😉
You place a single speaker in the corner of the room to find the best listening position in the room, listening to the bass only. If you move that speaker to another part of the room, the best listening position in terms of bass accuracy should still be the same place. You then try to place your speakers in relation to that monitoring position. This is my understanding of it anyway, but happy to be told I'm wrong.
More than 24" ? Or should that be no less than ...... 24" from baffle to front wall, gives just over 3 ml secs reflection, which I think blurs the sound stage depth. Best if the front wall is treated with diffusion (possibly quadratic diffusers) and having front baffle at least 3 feet from front wall (5 ml secs reflection, minimum so that reflection does not interfer with direct sound). I have a treated stereo listening room ( not a studio) where I have my speakers 4.5 feet from front wall (room is 28 feet long, 12.5 wide), and find this gives best stereo image and soundstage . I think most don't realize how pulling speakers out from the front wall can really help with soundstage depth and stereo image. But then again, trust your ears ..... takes but a few minutes to move speakers around and try.
Your face reminds me of Jennifer Lawrence ❤
🤣
Yikes
"nunya bizfam" - None ya biz fam 🤣
Everything about my set up is non ideal. Room shape. My screens vs monitors. Multi use studio. So I just had to do the best I could to get an even sound.
So, w a pair of CV SL-15 I ot to have spkrs 15 feet apart and me being 15 feet back and the tweeters at ear level.
I can easily her the music go from 1 spkr to the other and separation the room has 2 stuffed chairs and large tapestries, a vaulted ceiling and carpeted floor .spkrs a few inches from the wall.
I do think that 2/3rds of stereo budget ot to be on spkrs.
A thousan' $ receiver or amp and hundred $ spkrs won't sound good but a 1k$ pr of spkrs and a decent rcvr say an sx650 pushing 35wpc would sound damn nice.
my room operates under the 3.8 centimeter rule . anymore than that and i'd trip trying to go through the door.
I can understand why you pivoted away from consulting hifi customers 😅
The 38% “Rule” was by Wes Lachot
There are rules and then there are no Rules except move stuff around and try different placements and listening positions.. You have to play around to find the sweet spot for everything.
You know what? If you are an Audioholic or just someone who takes listening to music or media seriously well then good for you. Lucky there are thousands of times more of us that regard audio on a lesser level of importance. We have a room that we may do something else entirely in like other hobbies or something of a more social, if not domestic nature. For us Music and Media is just a nice addition. Not necessarily carried to any extreme but just an additional dimension. We are not going to put sound dampeners on the walls and ceilings we are not going to rearrange our populated room. I guess this video just wasnt for me.
Sure. That’s like me watching a Lamborghini engine tuning video and saying, “high performance sports cars just aren’t for me.” 😁✌️
@@GregoryGuay
Can't navigate to the speaker test video
So wright Just position the speakers where They sound good. Mine to the eye make no sence BUT I have an L shaped room!
its easier when you build the room around the speakers ;) ( room in room )
My speakers do not a ports on them
I asked the gf to put my towers where she thought they sounded best.
Next thing I knew they were in the fire pit 😫
A picture worth a thousand words. Why don’t you put a diagram here?
then why not just call it 40%
Your statement about the distance to mix in ANY room is bullshit as well. It is FALSE. Room acoustics is NOT about hypotheses or "theories" it is physics. I agree with you about the woofer size vs distance. It's bullshit as well.
1. You should pay attention to the equilateral triangle
2. Your listening position must be (not a recommendation!) 0.375 times the length of the room. PERIOD.
3. You must pay close attention to room modes and their balance in the room
Is the 0.375 position not only relevant in an ideal room though?
@@KaneDWilliams it is critical. It's not an arbitrary position.
@JHBrandt I disagree as does Wilson Audio and their WASP method. Have you heard of it? Depending on so many variables I'm not about to list, your demand of .375 is not scientific in the least. There's no universal psychoacoustic law that would validate or substantiate that claim.
Another UA-camr just sitting and talking to the camera with out any any footage from speakers 😂
Best advice is no advice 😂Place your Speaker and Listen to them ,move them Till you find your Best Sound. You don’t need advice . Your ears are your ears and your room is your Room. No one can Tell you Whats Right for you.
Alright people.... Time to go metric...
Blabla zzzzzz
bla bla bla... measurements? frequency response