Rotary/Regular Subwoofer Combo (Best Car Bass System with full audio range? 40,000Hz to 0Hz)
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- Опубліковано 12 вер 2024
- Having reached the pinnacle of my rotary subwoofer adventures, I bring you the rotary/regular subwoofer combo in the car. This setup is capable of audibly outputting frequencies from 40,000Hz all the way down to 0Hz, and I can even drive around while using it! It can also reach a stunning 140 dB at certain frequencies (around 12Hz). Watch as the system is used to literally "rock" the car back and forth, rattle the doors, shake the interior of the car, and more!
7:00 I was not expecting such power, you deserve more attention for this.
Thanks, I'm trying but there's a lot of UA-camrs out there. I want to bring this to a car meet tho
@@nathanbulle5782would love to see a video on that and their reactions. This is an insane piece of kit
@@nathanbulle5782i don’t know where you’re living, but long time ago I wrote a comment about rotary subwoofer in car to a channel called EXOcontralto who is a car enthusiast, he lives in the US, in a FAQ he answers saying that this would be craaazy ^^ bringing this to a car audio show will boost the R&D of the best setup for this and give you more attention.
I will try to inform him about this =)
@@nathanbulle5782 This is not practical for automotive use though in the house it will be better. Nobody wants to hear that fan running constantly nor to have the trunk open nor to be freezing cold.
You need to explore the original rotary design with a shroud and alternating current fan like the old theater subs and phoenix gold rotary sub. This way the air itself is moving in and out. Yes it is impressive to see the doors moving like they are.
With that being said I think you should look into using voice coils out of a computer hard drive to drive your fan blades tilting rather than a conventional sub magnet. Yes perhaps you will need to likely run one on each blade. This design has been done but the HDD coil design has not. This is your opportunity to be TRULY innovative.
You are welcome to use the idea. I have faith that you can do it so when you become a millionaire I want 15% for the IP rights. :)
You'd steal the show no doubt
That's moving a serious amount of air!!! That must sound and feel amazing!
Sounds like a pipe organ on steroids
@@nathanbulle5782what are the physical sensations? Also how fast can a rotary fan change pitch? Say one not to another on a basic scale? I'd imagine the fan blades carry some momentum?
@@SaltyAsTheSea the weight of the air, the pressure from the air, and the moment of inerta of the individually tilting blades all play a role in how quickly the blades tilt. On this build, the blades start to drastically decrease in maximum tilt angle after passing above 25 hz (25 tilts per second). A model with thinner blades could do more drastic tilts per second (say 50 tilts of 45 degrees per second) since the moment of inerta of the blades gets drastically reduced. Also the sensation feels like your insides a pipe organ (actually pretty much exactly like rolling a back window down in your car when driving 80 mph). Does this answer your question?
This dude is a sound genius this is nuts I don’t even know what I’m looking at but I understand it all
Your looking at an alien sound system lol
The articulating hardware moving the vanes, and the vanes are predictably noisy. It wouldn't be too hard to make a silencer box on both sides. The high frequency noises can be filtered with the correct sound absorption materials, while allowing full air flow.
There are currently at least two people working on rotary subs, the weak point is the hardware. The other guy is using model helicopter hardware that changes the blade angles much like a rotary sub. I think high quality components will be quieter because of tighter tolerances.
You are doing an excellent job with this project, I am a speaker builder, I am impressed with your ability to translate a complex commercial product into a working hobbyist prototype. There is definitely a market for a consumer level product based on this concept. See if you can get the attention of a venture capitalist with vision, and you may be able to develop a viable product.
That's my goal for sure I wanna sell these. Also I 100% agree with you on better quality components I need to get a resin printer just can't afford it yet
Even if it's just a tube covered in sound deading it would help
Bro as soon as u turned on the music it dropped off
Yes, build a 7th order bandpass box to act as an acoustic low pass to get rid of the fan noise. It doesn't have to actually resonate, so keep the ports as big as you can otherwise the ports will be the limfac.
@@nathanbulle5782You might need to go with fiber placement, but before you do that, look at forged carbon composites. You can 3d print either a mold or a model that you invest. Then layer up chopped carbon tow with epoxy and clamp the mold shut. There are good tutorials on how to do this on UA-cam, and I'm sure from looking at what you've built so far that you have the skills to do it. But don't skimp on protective gear you should wear gloves will resist the resin you're using and at least an n95 mask.
You, my man, are a legend 🔥 Been watching this over the years. Excellent work. Truly reminiscent of that little known linear oscillator that could bring down buildings. 😄
Does anyone want to see what this rotary sub would do when operated underwater?
That would go crazy
Well now...
This can work underwater?
@@djpronic I have no idea
Um. YES!!!
Imagine a water tower with this kind of system on the side, would be the biggest subwoofer ever.
Someday I will put a 20 foot version in a very large water tower
10 of em in there my god thatd be a experience
hey man, awesome video! never expected the mic to clip down in the infrasonic range and im definetly keen to see more rotary sub shenanigans!
I thought i should let you know that i make music and you can use the music i make to avoid the copyright issues, i can make bass edits of them with the sub bass lowered 1 octave or two and post them on a secondary channel, you wouldnt need to credit me if you'd like.
We should hook up! Do you want to connect with email, text, or how?
the mic was clipping with just him talking.
Haven’t seen a rotary in a car since the old phoenix gold units. Keep up the good work!
So awesome!
I love how the car doors was shakin’ like 2 BBW’s making out. Crazy!
I tried your song on this as well and I could hear the 7hz pretty easily
@@nathanbulle5782
Awesome 😎
This needs to be metered to see how many DB it's pushing at infrasonic frequencies. This is neat. It's a good setup the rotory subwoofer for ultra lows and the 15" Pro Audio woofer for mid bass punch.
I think at 12 hz at max volume it's pushing more than 140 dB. I did some research and this makes sense. It can make 3 hz very audible so it has to be pretty loud, more like pressure waves at this point instead of sound
@@nathanbulle5782 doesnt seem like a 140 imo. the whole car would be shaking with 140 db at 12 hz. My system does mid 140s in the 20 hz range and is much more violent than this
@@SbassLaser yeah because yours is doing 140db at almost twice the frequency. By the way, how many watts is your system?
@@nathanbulle5782 The amp is a smart 5k but I havent clamped it with this system so I'm not sure exactly how much the subs are seeing. I thought lower frequencies caused more vibrations, but I've never actually experienced less than 20 hz. It would definitely be interesting to see your system on the meter!
@@SbassLaserI’m going to have to agree with you. This is likely mid to high 130s at sub 20hz. But that’s extremely impressive for the driver size
That's the most badass thing I've seen since I've gotten into bass literally don't let anyone tell ya different you're thinking outside the box people are going to doubt but you know statistically speaking you've got the best
Great work including getting it recorded - my home sub only reaches about 15Hz and I can confirm that there was plenty going on down there!
Finally someone is going into rotary subs for real, this is fire bro ❤🎉
I just think of them as regular subs since I design the parts very light and with fantastic leverage on the blades
Thank you for putting this video out! I really wanted to buy a Phoenix Gold rotary subwoofer back in the 90s but couldn't afford one so it is great to see one on your video!!👍
A Phoenix gold cyclone is a little different but glad you liked the video!
Yes Ive seen Rotary subs but not in a car audio application. The PG Cyclone is different as it doesnt seem to make continuous spins. Would be great if you do comparisons between the two.
@@chokechange cyclones are also ridiculously expensive so I would have to build one. Any ideas on where to find the servo?
I'd almost want to see you take this to a car audio competition and see what SPL it meters. lol
Do they have spl meter that can read down to 5hz?
@@nathanbulle5782 I don't have an SPL meter personally, so I'm not sure how well they work at infrasonic frequencies, but I'm not sure why they wouldn't. They would use SPL meters designed for car subwoofers, which will often reach below 30 Hz, so I'm sure they're not using A weighting or anything like that for their measurements. IN theory, the "Z" weighting shouldn't attenuate the low frequencies at all, but I'm not sure if infrasonics are exempt from that classification or not.
@@ansonx10 the only reason they don't work well with infrasonics is because of the tiny surface area of the mic diaphragm. It can't move very far either so how is it supposed to pick up those really low pressure waves?
yes@@nathanbulle5782
@@nathanbulle5782 I believe the Termlabs measure as low as 3hz if i'm not mistaken
Man this is so cool. I'm seeing some basshead in the future building a wall of these in a van for 3Hz hair tricks lol.
I want to build a cube building with four engine driven rotary subs that have like a 10 food diameter. That could cause tectonic plate movement 💀
@@nathanbulle5782 KINDA sounds like the "weapon" tesla built that he had to smash when he almost brought his building down.
@@justotalkalottashit8392 can you plz provide a link to a video of this "weapon"? I'm quite curious
There is a fine line between being brilliant, and plum loco. You, my man are walking that line. Keep it coming!
Followed for while after being introduced to this concept from your videos it’s incredible to see how far it s come
YOU DID IT YOU MADD LADD!
Thank you so much for your donation! You have no idea how much this means to me, may God bless you!
Very impressive! I bet if you put 4 of those in a mini van, you could compete in the SPL contests and win! They'd have to change the rules because it would out class them!
Thanks for the video!
I might collapse the van lol
And that's a bad thing? 😁
@@billklement2492 it would certainly be a funny thing
Gotta build myself a rotary sub just to hear how yours sounds now 💀💀💀
Ik lol, you can still see a subwoofer or headphone driver moving tho for the frequencies that are too low to hear
That rotary sub could be half the size and do damage to that car lmao. That's nuts that you would have the rotary sub bigger than the regular sub. That could shake a dry-walled house apart.
Wow! I so stoked to see this setup in your car. Great work! Guess you could put a grille on the fan so it’s safe. Cool to see the doors and car flex with the lows. Wonder how this can be implemented into an SQ system… maybe the spare tire wheel well could be cut-out for the rotary sub fan location and if it can be quieter. It’s so amazing for the low frequencies. Again, great work! Bravo 👏🏼
I thought about the wheel well as well, good idea but we also have to try to keep the air from having to go around too many corners
@@nathanbulle5782 oh, I see. There’s definitely a lot to it. Great work 👍🏼
Such a sweet update! Have you made a post about it on DiyMobileAudio yet? The old dudes over there would love this kind of project. They're a bit grouchy at times, heavily opinionated... that said, there are some great minds on that site. I'm sure they'd love to follow along and offer some assistance free of charge. Especially regarding audio recording, frequency response measurement, driver integration (crossover/amplification setup) and automotive fab (bracing, etc) ideas. Awesome work Nathan. Bright future ahead of you.
That sounds interesting I'll have to check it out. Maybe they could help me with the interference I'm getting when the bass hits and sends part of the signal into my car stereo
I have to agree. At first, I watched janky set up and I thought “another one of those UA-cam you can’t hear a subwoofer videos”. But then you got into the detail and explanation of the rotary sub works. I was listening to this on my home theater system with golden ear XXL supersub and your demo took my sub BEYOND ITS LIMITS(!!).
Probs for the setup and much thx for the demo!
Love that youre playing Disconnect as your sound test, big up DnB!
This is awesome! I've been waiting to see someone do this ever since I saw the word rotary subwoofer. I wonder if you could have a manufacturer make something like the Audio Control Epicenter bass restorer to get infrasonics. I've heard they make country sound like hip hop with how much bass it can find.
That sounds interesting, is that an audio interface or like a type of subwoofer?
@@nathanbulle5782audio interface, a bass restoration device
@@nathanbulle5782it’s a sound processor like a dsp made to enhance the bass in music.
@@nathanbulle5782 it is an RCA pass through DSP
it's a product by Audiocontrol@@nathanbulle5782 . it's a sub-hrmonic synthesizer and will take upper harmonics and recreate the fundamental. it's been around car audio for decades. it's awesome for older music that had very limited bass.
Best video yet, I can tell you put more into the production!
I think this is something you have to be there to appreciate.
Yes
glad it worked so well, you were saying last time that it work in a car. I don't know why bass competition industry still does not have a hybrid or some resemblance to this. The lows are insane.
💰- they can’t price a box fan at $500 😂
@@thebotlobbydaily I didn't get it at first glance but this is really good one!😂🥳
awesome to see the progression you've been making! keep it up
Been wanting to see something like this for a while good stuff my guy
I could tell that was Chase & Status - Disconnect, just from feeling it through my chair (bass shaker) lmao.
Also, holy power on the sweep, bloody hell. I know the mic really doesn't do it justice but I can somewhat appreciate it thanks to said bass shaker. Below 10hz tho it must feel absolutely wild... Crazy powerful stuff dude
I thought about putting bass shakers behind both the seats on top of it lmao
Could you do a build video on this sub, it looks quite a bit different from the first one you built?
It's built the same way it just has different crude aluminum beams holding the speaker part to the motor
While I'll layout some criticism, overall cool demo.
1. Rotary sub requires an infinite rear enclosure, and technically an infinite front enclosure. In a house the volumes can approach "infinite" for any measurable usefulness. In a car, it cannot. you tested with the trunk open, is evidence enough. You'd have to test with the truck closed, and then it's not going to work very well. The blades will be forcing air into the car while the gap on the edge is going to hiss from the air trying to get back in the trunk.
2. The part where you turn on the rotary sub and on the mic you pick-up this loud ... Fan sound... And you comment over it explaining that with it on its inaudible and use a subsonic mic/meter as the indication of information.
3. The infinite baffle sub you have directly next to your rotary which would be working against your goals. Presumably you are not playing sound from it, which means that it's flexing negative as the pressure in the car builds and forwards when it drops.
Man now you need one more fan and holy shit you have a monster in the car this will change car competitions forever if this can become a new thing
Thank you for implementing this into a car! We’ve all been wondering what this would do in a small cabin.
this is a sick and well executed experiment. i think what is needed to take it to the next level is a fully engineered rotary. custom high efficiency airfoils and well packaged linkages to maximize the intentional air movement and minimize turbulence and wasted power as well as improve response at 'higher' (normal) bass frequencies.
The gain match has its advantages when tuning the speakers.looks like an interesting build.
That is really cool, you should put a large sheet of something flexible infront of the subwoofers and you might be able to see it move back and forwards
I had this playing in the background while I was working on a project... I have two 50watt Dayton Audio BST-1 tactile bass transducers attached to the back frame of my computer chair... That bass sweep @6:30 made it so I couldn't even focus my eyes while it was running... Caught me a bit off guard! XD
Lol, gotcha!
Back in the late 90's / early 2000's, Phoenix Gold made a rotary car sub called the Cyclone and I always wanted one. Nice to see a DIY one in a car!
The cyclone is a very different design
Have my first one printed up, but have not gotten the hardware. I play with lots of the healing/meditation type music, specifically at 11hz right now. I get to it with sending 50hz to the left sub, and 61hz to the right (just an example), and this phase cancellation works pretty well for the desired effect, but the Rotary seems a much better answer, and very worth trying it out.
That's cool that you can achieve infrasonics by mixing two audible bass frequencies. Very clever. I think you can definitely achieve a more pure bass wave from a rotary sub tho
wow it sound impressive on my headphones.
The lows damn 🔥🔥🔥 my jbl earphones picked so well , that demo is sick bro thanks a million for the hard work and sharing with us
Glad you liked it
I am super intrigued. Would love to experience it in person
I live in az
I think this system is what a tank was built for
Seems interesting. But i could not here it. I can barely see it move. I noticed it was working when i saw the standard sub move. But it seems to be doing good. Just dont rattle the car to death. I have seen back windows blow out. If you close the trunk you may want to creat a air vent as a pressure release because you might end up with a warped trunk lid. So best of luck to you. Keep it up. You just may end up with a marketable product in the end. Who knows. Its nice to see such experiments . Don't give up on it keep working on it to make it even better. Maybe one day we will see it on the market .
I was not expecting that at all you did an awesome job
Dang this is really impressive
Sounds like my old dads car on while everyone was screaming lol 8:44
I wonder what it would do on a db meter on the windshield. What would the score be? Would it register at all? I would love to see you revisit this set up with a meter.
I was going to buy an spl meter but all of the meters don't register below 30hz. 😭 12hz is when this thing really kicks ear drum
@@nathanbulle5782 ah OK that sucks!! Thanks for the reply! I love this little series you got going on with this rotary sub.
@@nathanbulle5782I know there’s some that will go lower than 30 but I imagine they’re very spendy
Have you measured the SPL? This is such a good idea. Miss the PG cyclone rotary.
Haven't measured it but from research and comparison I think it's 140db
Nice infrasonic mic hack!
Did someone say Sonic?
It is genius how he uses old subs as microphones. This guy knows his stuff
never heard of this until now this is awesome
7:15 thats just straight up a 5000w sub or sm thatss amazing tbf coming from a rotary sub
So you technically sitting inside the enclosure 😂 thats sick
Dude you seriously need to take this to an SPL contest just for some giggles, it'd be insane to see what this kind of setup officially measures
Not sure they have the right equipment to measure
@@nathanbulle5782I think it would work. I believe spl meters (DB drag meters etc) are measuring the pressure, not microphone frequency or frequency itself. I think if you're generating pressure, you'd show up on a quality spl meter
Wonder how the air velocity is with trunk open, and only one front window down? Could probably do infrasonic hair tricks
Maybe idk I need a woman
I could see the camera in your hand vibrating with the bass even outside as you walked around your car. In freekin credible !!!
I know there is a lot of that lol
Willing to sit next to a fan that might explode. Haha!! Well done!
Dude clean the inside of your car, but I am impressed because I've never seen one in a car before
I remember in early 90s my friend told me about new spinning subs like this.I never see them but he told me his friend had a fan set up like this.
Did he tell you about how it made cracks in his house and his mom banned it forever lol?
Bruhhh, when I seen the front of that car, all the damage….at that moment I knew…..that damage had to been caused by that damn subsonic woofer HOLY SHIT!!!
that's so funny. what a back story. much more hilarious than the real story behind the damage
LMAO, it was actually my step mom who crashed the car but I wish it was the rotary sub
@sarahbulle8704 hey sis!
@@nathanbulle5782 hi bro
8:38 "VERY HARD ON THE EQUIPMENT"😂😎
Someone walking by will be calling for the exorcism of that car😂
Lol
Truly the car of all cars
This is right up my alley. Please dump the raw infrasound file to download in the description. So I can geek out on it. 😉
Do you want the Becky Hill disconnected audio or the sweep?
That's the loudest infrasonics I've ever seen for the little amount of power you were using you would normally see that kind of door flex with 6th order bandpass setups with 4 18s with thousands of Watts, It would be interesting to see how much air it's moving with one window down and see if it can float things in the air.
You're doing the Lord's work man
Just wait till I start putting scripture in my videos!
Also that pro audio would perform better if you put a small sealed chamber behind it, and bandpassed it to play prob. 40Hz to 200 or 300Hz= would have less cancellation with your rotary, by being sealed, and would have much harder kick's.
I knew I subscribed to you for a reason
You mad lad
Keep up the work i definitely digging it ive been wanting to make one for some time now and this definitely is enspiring
🤔...✨✨✨ ❤️💯 Very nice do more experimenting 💯
This IS SPARTAAAA! 🕳️🏃🦵
Let's see some roof or windshield flex. Maybe even rearview mirror
I needed this. Ide like to see a stealth build where you cant see the vents to the outside air and it can operate without the trunk being open. Maybe run a tube to the outside of the car? And maybe test to see if it can operate inside of the trunk with the seats up. You know, a practical permanant build.
This is why I'm currently working on a couple of 6" ones that go in place of the car's rear speakers. These should work with the trunk closed
@@nathanbulle5782 cant wait for the update.
This is absolutely insane
I'd like to see a combo like this for a home theater setup.
I'd probably love movies a lot more like that.
Yeah if you want your house to shake almost enough to blow out windows
Pretty insane man.....very cool
Be cool as hell to experience that in person
That's awesome!
I recommend spend a little on cleaning the car and new (better) mic. but it sounds good
Great advice, especially since everyone says this
Can I suggest another test with a bunch of balloons or ribbons/strings or a pom pom so we can see how the air is moving back and forth? Or maybe even a fog machine??
Fair play for getting this together it sounded great on my 10" isobaric sub ,but maybe not as low as your's .
You made a comment about the rotary sub being at full volume, but if you could put up with more fan noise, all youd need to do to move even more air around is increase the fan speed
Increasing the fan speed helps with higher frequencies but is also harder on the coil.
Neural Liquidity achievement unlocked!
Can't wait to build one myself. I already said it once, but I wanna make it my final work in school. Just wanna see teachers go deaf lol
Yeah installing one of these in the classroom would be absolutely baller. It would really blow the students away
I love this
This is pretty cool I also like to see what those big $400.00 earthquake tactile transducers could do or even bigger commercial ones in a vehicle
The tactile transducers are so stupidly simple lol
You just did unexpected, big up
Yup
You need to go set a world record for loudest car audio at 4hz or something hell set is from 0.5hz all the way to 15. I think the only comp u got is myth busters who used a car engine as the sub motor and a 60” sub or something crazy. They got like 130 spl at 16hz or something crazy before the connecting rods between the engine and sub broke. They would literally have to make whole new class just for you but same time I would love to see the spl readings and would love to see a spl high excursion like 30mm xmax motor and suspension on one and then see if it can blow out windows.
130DB at 16 hz is not that loud. Nowhere near a record anymore. Pretty sure my homie Jay Janelle is louder than that, albeit on considerably more hardware and power.
Mine reaches about 140 dB at 12 hz, quite painful on the ears
@@nathanbulle5782 yeah db and spl are two metric. Spl is how much pressure you build and based on your door your easily getting that and really look at a 160ish spl car and that’s about the amount the door flexes but all so widows start getting waves all so wonder if a ducted turbo fan would work all so at the HZ you are using that at you could switch off the sub motor to a high speed high excursion voice coil actuator or there are several other types that you could get over probably the 30mm xmax with just idk how that would translate into the fan blades attack and better there is a sweet spot u have to stay if and a really steep fall off when they go flat or to angled and no longer dig and move the air but actually just get a bunch of drag slowing the fan Rpm while creating a bunch of dirty noise. And a good experiment I would love to see is making some kinda really big horn loaded set up cause horn loaded works weird and really attaches the sound to the air movement better than anything else really. Idk if it would work or be worth the effort. Another thing idk if you’re aware of. You’re not very far off on basically having a working Tesla earthquake machine. The one he hooked up in the basement of the skyscraper in NY then only with a few oz or lb oscillating weight moving at like between 0.1 and 12hz but was able to hit the buildings resonating frequency and the whole building started to shake then kept growing till he got scared and shut it down but the shacking didn’t stop apparently he was I think around the sheuman resonance and that’s at 7.86 hz or something and the resonance of the earth but actually he claims set off a like 4.6-5 earthquake on top of all most causing the entire skyscraper to collapse. But I’ve seen those cause cracks in houses and stuff and you do realize you’re basically doing the exact same thing as Tesla.
@@RedBeardRebass for that hz kinda is and bet with some tweaking you could get that a lot higher and not have the double the watts for 3 db increase but more about how much pressure you fan can build and how much torque it has. Some fans move lots of air for air flow others are for building pressure and bet with some mods u would be surprised. Plus not many cars can go near that loud below 15hz even with massive amounts of power.
@@kevinb.8649 ...what?
Subscribed this is awesome and very interesting
only a matter of time until a rich guy does a little trolling and puts one of these on a windmill.
Basically.
I'm not a sound engineer but I'm pretty sure you want one or two resistors on that speaker cable running directly into the input. That enough power to pump a whole woofer. U need to tame it down before running to a circuit with no power dissipation unless you want it to melt or short.
Do most woofers get run through resistors?
@nathanbulle5782 no idea. Again, im not a sound engineer, i have no idea what's normally done. But i think speaker outputs run around 70 volts while line voltage is around 1 volt. So ur recording device might be designed for WAY less power than it's getting. It's supposed to get an unamplified signal as far as i know. Like enough power to drive a tiny earbud speaker, not a big woofer.
I really like your sub builds. I have a few different designs in mind for different priorities I'd like to try. It'll have to wait for all my other projects im in the middle of not finishing tho...
How would this work in a vehicle? True IB and fan blades face out of the vehicle? If so, i have a tahoe I would love to play around with this. Would only need it to cover from 10-60 hz as my Midbass has 60 and up covered. Also, i will be out in AZ in about 3-4 months to drive around the state for about a week. Would really like to experience the effects of this if it's possible.
If you can provide some form of contact maybe we could discuss and you could swing by
I can't Take this guy seriously, with a Rockville sub
LMAO!
Give your car some love. Some washing and some vacuuming 😅
But crazy setup 🤯
Que gambiarra do caramba bicho... mas é legal.