***How To*** Set Your Car Amplifier Crossovers with a DMM *Tech Time Thursday*
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- Опубліковано 26 лип 2024
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Thanks for the tip Derek. I use mine to check certain things but I will use the knowledge in future builds.
That's the best life hack I've learned in a long time. Thanks.
It would be if he had done it right, but he didn't.
@@DIYAudioGuy yes isn't it supposed to be an 80hz Crossover like @meade916 said
@@streamplug6070 ua-cam.com/video/KUvJNhC-BAE/v-deo.html
@@DIYAudioGuy nice Video I Subscribed yee I prefer 50hz LPF aswell I dont like 80hz hahhah
He forgot to mention, have your gain levels set to zero before you adjust your LPF or HPF. Play a 0db tone as well, like 50hz 0db.
LPF have it turned all the way up, play hz tone you desire for tuning and back down the LPF until you see the voltage reach it's highest point. Then set your gain level to desired wattage... Amp is tuned 👌
Correct me if im mistaken.
Just Make Sure Your Volume isnt Sending Cliped Signal to Amplifier and Your Amplifier not Cliping your Subwoofers
Whew! Just in time to help the new guys on DIYMA! This is WONDERFUL! THank you!
This is so much better than just doing it by ear. Seeing you do this actually just made a lot click for me
Very cool method. I'm always looking to improve my knowledge and experience. I tested this theory last night on two SADB4 18s on two ampere 9.0s gain matched at 1ohm . 4 Arnold's on an ampere 150.4 bridged at 4 ohm's and on the apocalypse super tweeters off the amplifier as well. Definitely pleased and made this process as easy as it could ever get. Thank you brotha.
Love it .. keep up the great work...
Thank you for that Make sense Can you do a video using that same tool on how to set the gains
One of the most helfpful channels of all time. Thank you.
My amplifier sounds way Clearly now thanks Derek
I’m tuned to 15hz!! Subsonic filters are my enemy! 😫
Great video by the way. 👍🏻
Awesome video to help adjust amps on subs, great information!
That was freaking awesome. Thanks a ton.
Good videos man this is going to help alot.
OMG, I should have seen this video before now lol. I have already bought the SMD DD-1 and was fixing to order the SMD CC-1. You just saved me right at $189 dollars. I do enjoy the DD-1 and have used it a few times already, but I bet of I look I will find out how to set my gains as well from your channel. Thanks for the information on how to set my LPF and HPF. Everything will be working great tomorrow for sure. Thanks again and you have earned my sub, now I just have to watch what other videos you have.
Now 3 yrs. later & no reply. How did your adjustments work out? Better with the DMM or the other equipment?
@@J01466 I just ended up buying the SMD CC-1 to have the matching set😅. Steve does make great products and they work great. Sure it is a over kill for a average person to just buy a set to only use once. I'm always installing systems in different rides of mine and always changing stuff out so I will use mine more often. Even asked Steve to sign the box as well. 😀
thank u i was looking for this
A person can not go wrong with a simple DMM and a Oscope with a clamp device the old school way of setting things on any amp is the best way.
Yu P
What shall I setup first? The Gain? Subsonic? Or the LPF? I have 2 Sundown 10 E v3s 500 RMS each and a 1500.1 amp
Good shit D👍💯
Thanks man!
I was told to multiply that original voltage by .707. Then turn it until the voltage drops to that calculated voltage. So you multiply your original voltage which was 36. Multiply that times .707 and you get 25.45. Adjust until you get to that 25.45 level. Would this be correct or more accurate? The RMS of a pure sine wave is .707 @ peak power that's why it says to multiply by that number. Makes sense to me. Just want your thoughts
Excellent I think the Sundown Community will really appreciate that and use it thanks for the knowledge.
For the last 25 years, I set the crossover visually by the numbers on the dial. Boy was i way off. Thanks for the video. It made a great improvement in my system.
Are there specific tone recordings you need to do this? 0db or -5db for example
Thank you so much this helped me a ton probably saved me from ruin my subwoofer
Guys like you help a lot of us out here man 👏🏻
Great vid Derrick.
I do th3 same thing. However when setting a crossover, between midbass and subs for example, where you want a flat frequency response th3 amount of that drop will change depending on the slope of the crossovers/filters.
This is a more advanced/sq nitpicky thing tho.
Btw...what are the slopes on the filters in the SFB amps?
The Slopes are 24dB Per Octave
this is a cool video,what volume should i set my headunit to ,befor setting my LPF?
Quite clear and understandable! Thanks for the video!
I don't know is it a stupid one, but I do have a question .... How do you get all the frequencies that you need, for the crossover setup, on your head unit??
Google "car audio test tones" and you can download them all over the place. You can also make them yourself with a tone generator in audio software like Audacity, like if you wanted something nonstandard like an 82.7Hz crossover point.
hey thanks for the slice of pizza at slamology. I totally forgot u guys gave me ur last slice
u goin this year?
@@ugkforlife8405 yuh
How are you setting your lowpass at 50Hz when my SFB 2000 adjustment knob doesn’t go below 80Hz?? My subsonic is set at 25Hz but lowpass can’t be adjusted lower than 80. My CC1 also agrees.
Thank you!
Hey do you set the gain first with the dmm? After gain first then filters
So how do I know where to set my high and low pass, is there a spec according to my subwoofers or is it just what I like the sound of
I have a question do you set your crossovers with your own systems that way light for the SPL bill you did in the suburban
How do you decide what voltage should be at 50Hz? You just mentioned a voltage number and boom, you are at 50Hz. Even with your high pass, how do you know what is the target voltage? Did you do a calculation for say 20, 40 or 50Hz?
Derek, can you explain the “level control” just right of the gain control? I noticed that any movement of that setting causes distortion while setting the gains on my SFB 1000D. Is it possible to utilize both settings to achieve max gain, or is it one or the other?
It's the bass boost turn it all the way down
I'm not playing specifically an hertz or notes just music, would this apply or do I I gotta go about it another way?
love the channel, although seem like i remember (it's been a long time) that when a crossover is set a specific hz, that is know typically as the "3db down" point, wich electrically means .707 of the voltage produced with no filter. so to set crossover at certain hz, measure output voltage of amp with no filter, multiply by .707, set amp output to value you get? am i remembering this wrong?
For a six decibel per octave crossover you are correct.
My findings are .707 works for any slope of a Butterworth filter. (That's -3dB at the target frequency)
Bessel is only .707 when using a 1st order. For 2-4 it works as follows.
1st order Bessel = .707
2nd order Bessel = .58 (About 4.8dB down at the target frequency)
3rd order Bessel = .487ish (About 6.2dB down at the target frequency)
4th order Bessel =.42 (About 7.5dB down at the target frequency)
For Linkwitz-riley it's about .499 regardless of the slope. It's always -6dB at the target frequency.
I'm not sure if all car amps use Bessel but my Hifonics ZEUS ZRX1216.1D seems to use a Bessel Highpass. Assuming the Lowpass is also a Bessel filter.
@@DIYAudioGuy what about a 24db crossover?
This makes sense.
Now at what volume do you turn it up when you set it
the new model of the sfb 3000d only has 4 adjustments high/low crossover gain and level ... whats the reason for this and is the level setting bass boost or something else
I've seen this advice on a couple different channels, and I feel like it's close, but not quite right. I thought the crossover frequency was where the output was 3dB down from reference. So, measuring the unfiltered output, then turning the knob just until the voltage changes isn't accurately setting the crossover to the tuned frequency. This shouldn't affect the health of larger drivers like subs and mids, but could be destructive for smaller drivers like tweeters.
To get -3dB, you'd multiply the reference voltage by 0.707, then dial the knob to that level. So, when measuring 36VAC, you'd want to dial the knob until the DMM reads 25.4VAC.
This is the correct way ^
Old school heads know this stuff! This is highly critical in an SQ system when trying to get a good sub-satellite transition. -3 corner freq on the lp and matching -3 corner freq on hp creates a theoretical perfect 0db ripple at crossover pt. This concept is universal in crossover design. Not so critical for subsonic filtering. Not so critical for SPL systems either. Peace.
You are correct. -3db is the actual frequency cutoff setpoint
For a 6 db slope, this is correct. Learn more here: ua-cam.com/video/KUvJNhC-BAE/v-deo.html
Mark, so I would play a 50hz 0db tone at head unit clip point and have the LPF set max and multiple that voltage number by .707 and that new voltage number is my key point to set at 50hz?
Example, play 50hz 0db, set LPF at max = 70.23v now multiple 70.23 x .707 = 49.65 for 50hz LPF.
I upgraded to the sia 3500 do you set that the same way
So I'm assuming that you set your eq to flat when tuning your crossover?
You mean a DC square wave created by Pulse With Modulators! It turns on-off-on-off in a certain timing that looks like an AC wave!
Question: if i only want to use my crossover on my headunit how do i turn off the crossover on the amp?
Lets get setting gains baby!!!
edit: FILTERS....I meant filters!
What if I set my radio xover to 80, 6 way active xover to 75, and my amp’s xover to 70? All highpass on 6.5’s.
how you set gain on full range amplifier??
(brazilian amps like timpano and taramps)
i did it a bit diffrent if im wrong correct me but the way i did it worked for me greatly!!!!
i have a lc2i pro stovk head unit i set my lc2i at 5 volts to send clean signal to amp i then hooked up dmm to amp set gain to 45 volts 1000 rms @ 2ohm load
then i set croosover lpf i turned it all the way until voltage dropped looks to be at about 65-80hz
i did all this playing a 40hz -10 db tone
my system has never sounded so good oooweeeee
That remote work with SIA amps?
would be nice if more manufactures amps had accurate dials, some are terrible, some are pretty close. In my exp Alpine amps are fairly on point by a notch or two from sa 80hz setting. JL
amps are dead on from testing mine. I would assume audio control is also, no exp with their amps. Had a SKAR 2 channel that was wayyyyyyyyy off, i sold that a few years ago
Are you supposed to do this with the head unit at its max unclipped volume and with the gain set at it's max unclipped?
setting frequencies doesn't matter how loud your head unit is, set it to 25% and do it their, all you want to see is the numbers change on yourVolt meter and you know your at the frequency you need to be at
Can you use a tone generator via phone thru Bluetooth to the head unit?
Hi my friend how are you I want to ask you something I have a mono block amp and I play one sun at 80 frequency what voltage I must have in my multimeter in out put and to sub sonic
I'm confused lol I'm slow so when running the sub don't adjust highpass right just lowpass is what I thought this cross over stuff confuses me
@sundownunoffial. Now to be clear when setting your high pass you have the dial on the frequency all the way down. Then you go up till voltage drops. And for low pass you set dial on frequency all the way up then you lower the dial till voltage drops?.
Correct, even when I set my crossovers with my CC-1 it tells you to start with the subsonic all the way down and low pass all the way up
@@clinthernandez9393 yes there to ways of setting your LPF Crossover 50Hz or 80Hz its Personal Preference at that point
@@clinthernandez9393 at what volume should the head unit be when doing the settings
Jm G not too high, if you’re setting your filters with a CC-1, it usually just requires volume about halfway or less, depending on the unit itself
@@clinthernandez9393 I'm using a DMM what volume should it be at for the testing
What does the numbers mean though what does this exactly mean, in lost on what number my meter should read
Yep, a key part to his mysterious madness. Also didn't explain headunit volume setting prior to hooking up the meter. I've rewound and rewatched but....still unclear. Why a 50hZ tone, not 40?
Maybe it's all clear to himself but...'splain.
How did he get the 36 for the 20 Hertz just asking for myself
He started it at a certain volume on radio and had filter all the way down and turned the knob up until the voltage started to change I belive
I heard those clip lights on the bass knobs (not just yours but mostly all brands) arent accurate. From what i was told, and from experience, slow or quick flashing of the clip light on the bass knob is ok. Its when it becomes solid red is when its actually clipping and thats when its dangerous. Is this true?
I did that exact test in this video. ua-cam.com/video/JNb1caulnKU/v-deo.html
Is this with gain all the way up??
Hello, on my system, with the blue light, the green light is also shining. Tell me, if you will, why?
How high do you set head unit volume
3/4 of full volume
I would think your highest clean signal.
Ima do that today on my amp ..high 20hz /low 50hz n then ima do bass gains as well 🙏🏾🙏🏾🙏🏾
Did this work? Was your gain set first?
@@Chris-B-Bassin dindt move gain bass at all left it zero
@@doncarl8734 I ended up figuring it out just now. But I had to use my cheaper dmm, the more expensive one kept fluctuating .2-.3 the cheaper one was pretty much stable
Can I use this bass nob on my sundown sae-1000d
Just wanna make sure I’m doing this right I have 2 subwoofers 300 watts each side so total 600 watts and I’m doing 2 ohms so would I do 300 x 2 or 600 x 2
u would do 6x2
Are you supposed to set the crossovers before or after you set gain?
After you set the Crossover set the Gain Just to Be Safe your not Sending Cliped Signal to your Subwoofers
@@streamplug6070 is it possible to set the gain first, then after setting your crossovers recheck the gain?
yo bro, i got a question 4 u, how we equalize the subwoofers from de head unit to the amp crossover, because we got a main eq, then we got a low pass filter both of them on the head unit and finally we got the amp crossover, how we set it to get, a clear and low bass , sorry for my bad english , saludos from saltillo mexico
Ye same I prefer 50hz LPF over 80hz LPF Its all personal preference neither is bad
So on the 4 channel sfb amplifiers, so the amp uses both sets of filters the LPF and HPF at the same time, you have to set the selector to FLAT correct? This video didn't say that and didn't assist a 4 channel amp only a sub amp 😔
oo he will Do More Videos of The 4 channel Dont worry
Emf does one on youtbe
What does the subsonic need to be set to for the x series? 😆
Depends on thr tuni g freq of the enclosure...usually 1/2 oct below tuning.
Depends on. BOx tuning man
Yup Depends on The Box Tune it could be Tuned to 30-32 hz Depends
Is there a way to cut off frequencies higher than 80hz. Like if you wanted to only play 150 and up?
The end of the video hes explaining using the high pass as a high pass for mids not as a subsonic literally right at the end
@@bigrobstillpimpn yes but its my understanding that he is playing 80hz-20khz. I want 150hz-20k hz
he was doing 20 hertz to 80 hertz.
if u want 150 and up, just set hi pass at 150, leave low fully open
what is the calculation? u just put 36v and its set as 20hz? im confused.
il n'y a pas de calcul, tu décides la fréquence de coupure que tu veux comme 20 hz dans cette vidéo , tu joues un son de 20 hz et tu règles la tension de sortie de ton ampli quand elle commence à diminuer et puis c'est tout
I didn't get to watch all of this and will watch again when I have time. How do u know where to set the head unit as far as clipping before the amp? I have many questions concerning this and I think there is many different variables concerning this. I'm not against it at all or trying to say anything bad at all. I am trying to learn how to do this perfectly myself. I can't afford any smd products so this is for the poor man. I need to know how to do it properly!!! Thanks again for the video.
This isnt about the other settings. They're irrelevant for this process. This is only about setting crossovers.
Alright thanks. Just trying to learn and understand. Don't want to damage my subs or anything.
Can we use the same method on speaker amplifiers like high pass?
Yes
How did you know to set it at 37v for 50hz. I'm confused 😕
Lets say 1900watts max power 1ohm u multiply that gives 1900 ,google 1900 square root gives you 43.5 volts for gain and LPF. Subsonic take 43x707=30.40
So 36.0 Vac is 20Hz tone & 37 Vac is 50Hz tone?
Where should the head unit volume be set at while doing this?
Stay Under The Maximum Volume Avoid Clipping At all Cost
@@streamplug6070 ok thanks
12 or 24 dB per octave?
24 dB per Octave @ 50Hz LPF
And if you dont like 50Hz use 80Hz LPF it's all Personal Preference
Will these work good on mids
Noo the Mids need to be set @ 250Hz LPF And HPF @80hZ
@@streamplug6070 i think you are wrong mate ;)
@@streamplug6070 250hz for lpf - sub ? Way to high..... Max 80hz for subwoofer and then 80-120 for mids so hpf
Hey so I got the hifonics Zeus 2400 hooked it up and not getting the boom I should with two twelves and ideas?
Set LPF @ 50Hz and Set Gain With a Metter Stay Under Cliping And Your Neighbors will Hear Your Boom
How accurate is this if you was to actually meassure it?
Does every Hz tone have a different voltage you had to bring it down to. For example if 40 Hz you bring it down to 36 V then does 50 Hz have a different voltage you have to bring it down to or is it the same?
JACOB HIGHLEY you need to watch it again, adj in till voltage drops, then bring it back up, I don't know what each frequency voltage will be
It is going to be different for everyone because of car/truck/suv voltage not to including 16v if these amps go that high
my setting will be different because my car is strong voltage is in the high 13 volts ranges
How do the sfb amps go bellow 80hz if the low pass doesn't go below 80hz and is the bass boost just for 50hz how does this amp work
I’m trying to figure out the same thing. He sets the low pass to 50hz but my sfb2000 low pass filter stops at 80Hz!!??
I did this 50 hz thing and I had words coming out my subs
@@daedae1342 set it to 80Hz, all the way down, if using this for subs only. Unfortunately that is the lowest it can go. You should be good after that.
Yea I already had it like that just wanted to test the theory he was giving I'm gonna upgrade to a different amp cause the sfb 1500 isn't enough for 2 sa 12 v2's probably gonna get the skv2 2500.1 by skar audio
My amp also clips when I know it shouldn't I used a 50hz test tone to set it and the AC voltage is only at 41.43v which is around the 1500 mark
im more interested on how he knows the Hz based on the voltage. how does he know the 50hz is at 37v
Thats what I was thinking. He lost me at that point.
37v is what the amp puts out and he's using it as a reference to set the 50hz
@sundownaudiounifficial
Can you post a link to that little amplifier on Amazon?
Jamie Price I would like to have that amp as well
Just Google it, amazon is the first link when you Google sfb 3000d
@@That_Car_Kidd
Not the Sundown amp bro lol. That little caseless amp for the 2.75's. All good though...I found several similar already on there!
@@MFFOG i misunderstood but yeah I've seen all kinds of those little amps on the internet, I've just been very skeptical. It would be nice to see a full review from a professional.
@@That_Car_Kidd
There are other options too with cases that actually look like a finished product. Would be cool to make a nice little DIY bluetooth speaker setup!
Or you can come to me to set them with a cc1
My amp don’t have a subsonic filter. Taramps smart 3k
Your high-pass filter is your subsonic
Why tf would he do that? He'd need a ported boxed that tuned stupid low. It's half a octave lower than tuning
Bro, just buy a h Hz meter from SMD Chumley and Tony the Tiger...or Walmart
Your things was already set so you knew what to leave it on. G Or someone like me that don't know much, I wouldn't know what to set it on.
Wrong method Sir. For a butterworth 12db/oct crossover with an unfiltered 37v your target voltage is 3db down at 80hz (assuming thats the frequency you choose) which is actually 26v. So play a 80hz tone with the crossover wide open if you see 37v on your dmm keep turning the knob until you see 26v , that is 80hz on a 12db/oct crossover. If its a 24db/oct crossover then you want about 18.5 volts.
hello youtube
Are you supposed to set the ac volts to 15 if we want it at 15 hz.?
No, voltage isn't directly related to frequency. See ohms law.
@@herculesbrofister265 thanks brotha helped outta lot
They don't seem to be answering any questions ⁉️
1st. I cant believe I just did this. So stupid
I cant believe you did either....lol jk
@@BlaZiN1213 --pray for me
@@Barney-hk3es LOL you Must have Did it Wrong Just Make Surw You aren't Clipping Your Equipment
Where do you get a test tone cd?
Online?
Buy it From @meade916
Steve Mead says this is impossible ,says it can only be done with his OVERPRICED crap
😂 thought the same way when he said there was no way truely set your gains proper without his product and that oscilloscopes are more expensive and arent as accurate ..
Jeff Klein that’s a false statement. And his equipment isn’t crap. I’ve used both a DMM, and the DD1-HV and crossover calibrator for years. When used correctly, they all are accurate. I’m really getting tired of the people out here in the audio world trashing guys making devices to make your job easier, and quicker. Also, makes for an easy check for someone who is a gain and crossover toucher. The DMM is a math thing that most new audio guys don’t know how to do for wattage to your subs, or bass, or mid bass, or midrange, etc. the problem with only using just the DMM, is it doesn’t give you distortion reading. That’s what an O-scope does. For crossovers, this is possible, but not as accurate, and hard to match crossovers for multiple amps, which could throw off tuning, causing subs to work against each other in a common chamber enclosure. That’s the benefit of the crossover calibrater over the multimeter. You can match all amps to the T with efficiency and accuracy with less chance of error.
The only thing I would by from him is the SMD Dyno machine that is it. Other then that all his portable devices are trash real talk STICK WITH THE DMM AND A OSCOPE WITH A CLAMP DEVICE AND BE ON POINT THE OLD SCHOOL WAY..........
@@mikehonda7934 Thank god Steve Mead came along ,for fifty years all car stereo installers have been doing it wrong and messing up people's stuff,YOU JUST KEEP BUYING THAT SHIT .!
@@jeffklein9623 20yrs in this game flawless gain and xover settings with the old school way hell NONE OF YOU DO NOT KNOW NOTHING THESE DAYS AND YOU ON STEVE MEADES NUTS WHAT A DOUHE BAG :D LOL
Or you can use a CC-1
or you could spend next to nothing
@@swagon7626 let's see a comparison between a CC-1 and a dmm. I bet the CC-1 is spot on and the dmm could be a couple hz off.
CC-1 IS NOT ABLE TO SET FULL RANGE AMPS LIKE THESE FAILED :D LOL THE ONLY ONE DEVICE FROM STEVE MEADE IS THE AMM-1 OR WHATEVER IT IS BUT IT IS OVER PRICE LIKE HELL :D LOL
@@________GHOST________ better do some more research. I own all of them. CC-1, DD-1+, AMM-1, and the IM-SG.
I'll stick with RTA. A $75 MiniDSP RTA Mic and free REW (room eq works) software. Highly accurate and you can get very specific with what's right for the car and speakers.
Man I don't know why they done this video so incomplete, you got to do some math jack. Looking for frequencies you just can't turn a knob until you see the voltage move you got to get to an exact voltage and that takes math
It's confusing when you said 50hz and meter is showing 37 LoL 🤣
37 is the voltage the amp puts out, 50 is the frequency he is using
@@tyronearendse1722 thanks