Car Rotary Subwoofer V2 (Extreme Bass Flex)
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- Опубликовано: 3 окт 2024
- This is my finest rotary subwoofer yet. It has sleek 2mm carbon fiber blades and it is set up in the trunk of the car coupled with a 15 inch box subwoofer. the fan and the port are sealed to the interior of the car creating a dual coupled system with port and infinite baffle. If this doesn't have good response, I don't know what will.
Backround music used:
Calmado - DJ Double X - / @djdoublex1559
Demo song used:
THIS WILL MAKE YOUR HOUSE SHAKE (Rebased with infrasonics) ( • THIS WILL MAKE YOUR HO... )
![BabyChiefDoit - Too Slow (feat. STAR BANDZ) [Official Music Video]](http://i.ytimg.com/vi/zayaxws7RPg/mqdefault.jpg)
Next challenge is to minimize/eliminate mechanical noise and safely house it. I'm following!
The noise and resonances will be tricky
I wish I could experience this in person. 🥰🥰
Same
On of the biggest jumps to apply hifi/industrial tech to car sub tech and no one cares. Subs have not really changed in basic design for over 100 years. Keep it up mate I am watching closely what you get up to :)
@@PedroKing99 Fair, it's a good start. But really this should be getting 10-100x the views or more when you look at the car scene. All the people throwing cones at getting louder.. it's not very smart when rotary woofers are incomparable for deep bass and infrasonics, they have existed for a long time now. Use the cones where they make sense and the fans where they work.... I can't wait to see what comes in future.
Check out the Kona Infrasound Noise Generator (KING) project, with a Thigpen rotary woofer. They picked up infrasonics from it miles away through a volcano... low Hz readings.
These mechanical drivers have been around since the 1990s, they just don't perform that well so most of the companies or all of the companies that were producing them for car audio quit a long time ago
How am I supposed to install this in a customers car?
A custom installer can figure it out, you got this.@@cesarcervantes5840
@@cesarcervantes5840put it in yours first. Lol
16 hz from a pipe organ, the pew shaker notes ..
Most people don't know just how bonkers pipe organs are. I really want to hear one in person one day.
@@spamcan9208 never visited a church?
@@pianoten not one with a giant pipe organ built into its structure
I heard a pipe organ many many years ago when I was a kid, lucky enough to grow up somewhere that was 20 years behind everywhere else lol was truly an imposing sound, very impressive now that I'm a sound head as an older man
@@Terry-hb6wc I dont understand. Maybe its a US thing but are you saying all your churches have subwoofers??? In germany I dont know a single church that doesnt have a real accoustic pipe organ
I bet with only one window down, the cabin gain is insane. And I bet it moves a good amount of air through that single window opening as well
I look forward to future developments, rotary woofers are the kings of big bass. They are difficult to mount to something that acts like a huge room-sized box, but a car trunk makes a good bass box. Home installs are problematic, most installs use another room or an exterior window as the box or a basement.
Movie theaters lack super deep and loud bass, especially compared to a good auto setup. I'd like to see a row of these in every Imax theater.
Watched another video where the original creator built a custom box into the floor where his listening room was. I think that's crazy, just seen another of a kid doing a setup in his car, with a 15 for the higher notes.
Well, If you're near the West Coast/PNW... The Evergreen Aviation Museum has one set up for a Titan II launch simulator. They originally planned on installing two units, then realized one was more than sufficient.
@@sergioh2015 By "original creator" do you mean of this channel or the original creator of the rotary woofer (Bruce Thigpen)?
Interesting I have been studying this style of speaker for the past 10 years. You sir came up with a completely alternate design and introduced it to car audio. That's badass
bro dun said "lets make a type of sub that only plays bassotronics" and DID IT
good job on the biuld
make a speaker for talking with elephants.. check ✅️
@@ZoeyR86 Honestly though, I've always had 4" excursion subs that played loudly all the way down to 5hz and despite you cant "hear" that low, you can still easily feel it inside your body/chest and often ( probably cuz my box was over 100 pounds ) feel it in your seat/steering wheel and everything. Having infrasonic bass subwoofers was always fun to me and I started appreciating music that played
@@PhxSt0rmz -This 17" Rotary Subwoofer is cleaner= no "Chuffing", and has more .5 to 20 Hz output, than any 8" subwoofer.
@PhxSt0rmz I'm an engineer and will build one lol.
I have 8x 15in subs in my van in a tuned 4th order setup for a fb3 at 24hz it's still in the 139db range at 10hz and the doors look more like grandma's boob's in a tornado than a sheet of metal 🤣. But 40,000 watts can do a lot of work.
I'm serious about building one I have tons of recones for subs around my shop and a 4in coil in a fixed motor setup with a machined peek poll extension for a big bldc motor.
I can vacuum forge some 3d carbon blades in an afternoon. It's actually not hard for me to make something like this over a weekend to a near commercial quality. I have a full machine shop and well over a decade of experience in aerospace manufacturing.
@@ZoeyR86 - I have 4-Fi Built 18s, in a Massive, Ultra Low tuned, ported No-wall enclosure. I have unofficially broke the Usaci Bass Battles No-Wall, World Record, back in 2019= i did not fill out all of the certified world record papers before, before driving all the way to a certified world record judge. Its capable of 150+Db, @ 19Hz, but i have not ✔️ Db @ 10Hz. Let me know how it performs, that should be really fun.
Thanks for all your positive feedback! On behalf of Nathan, it means a lot. The design suggestions are great!
Years before getting a degree in mechanical engineering, he was building stuff like this. He’s come out with stuff before others cornered the market on things like bluetooth headphones that vibrate with the bass. He’s designed many things before even stepping foot in any schooling program. He’s on the spectrum and his mind works in ways I'll never understand, but make no mistake, if he had the capital to start a business, these would be perfected, designed, manufactured and available to everyone interested. Don't hate, cuz this kid is truly amazing!
yeah baby, waitin' on ya . . good progress looing for more info to be released into the '
wild' for ordinary consumers and DIY'ers that want to BUILD IT!
Harbor freight has a great windshield removal kit that also works well on rear windows for when your bass system breaks your windows you can go to a self service wrecking yard and save money on glass.And oh yeah, thanks again for the recommendation of the sixty dollar roof rack for my c230k a few years ago.I still use the rack on my car.
Highly unlikely that hell break his windows with just this much power. But that kit is pretty decent you speak of.
I'm surprised you haven't been approached by one of the big subwoofer manufacturers to develop it even further. Good job and I hope you get what you want out of your hard work. Thank you for your video!
Well i think big audio manufacturers will hire or work with their audio engineers
big manufacturers depeloped, tried and decided they are worthless like 30 years ago...
Check out the TRW-17 made by Eminent Technology.
@@MrTeddy12397 Difficult to implement or install, yes... "Worthless", no.
I’m surprised Dayton Audio hasn’t made a DIY kit for one of these yet.
Love these types of builds, thank for putting the effort on creating this beast!
bro this is so cool and impressive. You are under the radar right now but keep it up and you will make it big. I can tell you are a genius just from this video lol.
Massive improvement from the last one! Looks way more durable :D Pretty awesome that you wanted one of these so you just... made one. Would be a very interesting install to demo at an audio show!
Rotary subs are fun because they can behave like they would have infinite "excursion".
It's only limited by how fast the rotor is spinning and how much air it can pull or push through it.
Hate to be that guy but
Push*
@@GnarpyGaming-shimmyYa typo on my end.
Sorry.
I will continue watching this whole project
I have absolutely loved watching your progress with this! So much more amazing than the original! I don’t remember if this has already come up but are you considering bringing it to market? Maybe like a kickstarter and a few different sizes of rotaries?
I would invest into a good audio processor so you can send the lower frequencies only to the rotary and higher frequncies to the subwoofer, it should help with having the blades move to much with higher frequencies. Really appreciate the real DIY and progress of your rotary subs.
You earned a like from me before I watched the video...Bravo young man, keep going.
If you add a curve to the fan blades it’ll add more strength and likely cancel out unwanted frequencies and vibration sounds
Round and smooth every single edge. Smooth flow of air is needed.
Round and smooth every single edge. Smooth flow of air is needed.
Yo thru the headphones those lows are insane..
This is really cool, nice seeing different designs and ideas
"Wake up Nathan has Uploaded again"
WE MAKIN IT OUT THE RESONANT FREQUENCY BARRIER WITH THIS ONE
played this on my house setup (6 15's 6 12's) and DAMN that thing plays low in a VERY aggressive manner lmao. i like how u made the design simpler. maybe put a divider between the skar and the fan so they have their own chamber in the trunk. maybe invert your mounting face so the blades don't touch anything, or set ur brace further back. amazing stuff man
how does stuff not fall of all ur shelves and cup break in ur cupboard
Next bass test you gotta play. "Sippin on some sizzurp" for the OGs 😂😂 that song single handedly contributed to my hearing damage in my early teens when I had a system in my first car. Good work my man, keep it up!
I love the design improvements.
It is a good idea, in addition to making sound, it cools the amplifiers by working as a fan
That was great! Thanks for showing us what frequencies can do. The way that they made the blades of your fan respond was impressive. I would like to hear the sub if it was not so close to the rear deck and back window. There is going to be a sweet spot for that sub, but for a sub that big, the rear deck and back window should be at least a few feet away. Very interesting video.
So i'm watching this over my nearfield setup with a sub that goes down to 13hz. Them sudden low notes notes outta nowhere shocked me🤣🤣 Keep going man! I hope you may start making some for customers! I certainly would love to have one and a friend also wants to build himself one.
I am tottaly in! but the scale of this rotary sw you trying is for megatheaters (very large spaces). Scale down, Try smaller diameter like 12 inch, cap the center of the fan, make smaller fan fins and also stiffer and thinner, use a more sensitive motor magnet, use a more powerfull fan motor , dont leave any gaps in any motion of the rods that move the fins. im following!
This gave me some big ideas for the massive 11040 outrunner bldc motors I have floating around.
I'd say Ditch the center make the blade s only 50% that long keep ther center solid and sealed and only have the motion system on the outer 30-40% the majority of the center of a fan is a dead zone. I think you can pick up a monster 8in sub like a sundown x8 or something remove the dust cap and attach a thin bearing to the coil and use the inside of the bearing to drive the fan this will integrate the sub with the fan all off a single coil and you can use the better BL gap from the subwoofer motor.
It looks to me like the driver motor needs more power
i 100% agree on center of fan being a dead zone.
The center part where there is no blade should probably be solid to make the whole system „airtight“. Making that part heavy could make it act as a flywheel to reduce the amount of rotational inertia lost from the blades suddenly causing a ton of drag
Getting better and better. Only a matter of time before finding the efficiency to size rpm ratio multiply that to multiple fans and enter an spl competition.
For SPL and keeping stuff cool this is a brilliant idea. Please put a metal shroud around her and never be in the path. Rotational force is huge (ruffly the mass triples when spinning), got keep you alive and well to see further advances! Been watching since the start, keep it pounding!!
@@stopdusty420 If I die to a rotary sub I will consider that a death of dignity!
I think you should watch the blades in slo mo to see if the blades are flexing and if they are stiffen them up even cf has deflection also have you thought of adding a tube to the front or back of the fan
great work. algo seems 2 luv it as well 🔥
try to float something in the window
This is an amazing video and I'm only 2 minutes in but the sound test probably does this absolutely no justice! The mic most likely cant pick up how crazy this goes irl. holy shit man good work
She was super clean when she leveled out. Almost there!
It sounds like a Helmholtz generator
I need this for my desert parties! Following for sure.
Repairing DNA in milliseconds! 😁
A lot of people don’t realize that rotary subs move air and create the vibration and movement of air similar to a standard subwoofer but these do not play sound like a typical speaker. A rotary sub alone would be pointless you would need normal speakers to hear music and sound.
Let’s goooo new upload
i just had a silly idea...
picture a dyson fan... but rather than a fixed slot that only blows one way... a "teetering" wedge that can rock side to side and force the air back and forth...or a valve over ports, something like that...
this has progressed much-so... shame about the mounts, lol...
next project, lol.
Very awesome!
@ 10:09 Needs damping.
The original design and the one by Nick Nolte makes almost no noise with the blades other than Bass.
Funny thing, the same applies to subwoofers nowadays that many "home brew" companies come out with loud subs with high excursion but sound like shit where the mechanical parts make alot of noise. The hardest part for any company and to have a subwoofer considered to be "SQ" is it's ability to play bass with almost no inherent noises at all.
Of coarse, i'm not bashing your design, it's awesome. I was just giving a noise lecture.
Are you talking about the eminent technology rotarys that make no noise?
@@nathanbulle5782
Yes the Eminent Technology's version.
It still makes a lil bit of noise but it's so low.
Not easy to make an object move back and forth without making noises of it's own since that would be the holy grail of speaker design; flat and noiseless.
@@Bassotronicshey bass tronics
Stronger basket for the voicecoil maybe 🤔. I like it!
You should sell a kit to make rotary subs so people can buy them from you and make it bc nobody sells them
I'm still working on that. Too bad nobody sells them
I don't think enough people know about them or like them. Be sure to tell your friend about rotary subs
keep it up! this might be the future!
I’ve been following you since the original one, which made a crack in your house if I remember, later rained and some how coils burned? , never thought you would come back with an upgrade, which is worth a sub, will be looking forward to you making this totally usable tech , who know maybe future expensive audiophile stuffs may have your rotary, drivers. ✨✨
Okay Im totally talking about another channel 😂, but still cheers 😂🙌🏼
I need one as a radiator fan lmao, badass stuff! reminds me of that hydraulic cooling fan that can reverse rotations
I WISH I COULD HEAR THAT WITH MY OWN EARS‼️
Ive been testing some 10hz mini sub horns and i can tell you that the infra that im getting is insane!
Never heard one in real life, but I'm sure it would be game changing! Possible improvements? maybe a stabilizer to hole the front center of the mechanism to the rear center to increase rigidity (in the vid it appears to be wobbling at certain points). Also maybe a blade guard for injury reduction. Maybe 3d print a spacer that allows the trunk to close but with a gap to increase air throughput. Also maybe balance the connecting shaft to help with vibration/noise. I really got to experiment with this... 2 12's is not cutting it if you know what I mean :)))) Keep up the good work man! You have a bass machine that not many people have even heard of!
Also, maybe a stronger motor to keep the rpm consistent.
There's just so much that can go wrong with this
I came across your channel on the first vision because I was thinking of building one for my jeep
Toroidal fan next? Just kidding, great work!
Just drive down the road with only the back window open 😂 Same thing
Sorry, last comment. (my phone sucks and doesnt let me edit comments) overall this is a super novel idea which i think you inplimented extemely well. Im super excited to see where you take it.
I think it may just need some small tweaking to the signal input/blade modifications but you definately killed it with the overall build! Well done.
Bet your neighbors love you. I did custom sub boxes/installs in another life, and would get obscenities thrown my way almost every time I tested.
Finally someone did this. Awesome!!!
I been watching since v1. Keep up the good work.
Idek what I'm watching but I like it. Keep us updated!
Sick shit bro keep it up man they just keep getting better and better !You post the STL's for this one yet?
I kinda lost all the files for this because I reset my computer and forgot to back up but this doesn't bother me I mean this was my design anyway
Know that’s thinking outside the box!👍🫵🏻👍
love it dude
Love your videos, cant wait to see what you've done now!
edit: that is a really cool design, although theres a problem with the noise the sub makes whenever it pitches the blades, it kinda sounds like a scratching noise. if you manage to fix that it'll be golden
dude do you just love the lows ive seen you in the comments of pure sesh😅
It's probably because the sub was accepting too much high frequency and maybe not spinning fast enough
@@pointlesscontent9241 yeah i love me some lows (plus ive known him for years so theres that). i used to run and IB setup in my bedroom that played down to 7hz
@@nathanbulle5782 i would try the lowest spinning speed that works as the high rpm gives noise.
Wow I didn't realize how much of a loading effect the air has until I heard it with the rotary off!! How much does blade speed factor in? Is lower speed more boomy/pitchy vs higher speed being tighter with more bandwidth???? Super curious
I think you'd gain much output from building an enclosure in the trunk with a solid baffle. Maybe run 2 of them. Seal off the trunk from the cabin completely. You'd also have more control over the pressure regulation on the blades with a well built sealed enclosure. Should help with mechanical noise and output. Probably at least 1.5 - 2 cu ft per rotary.
I always use high quality rubberized undercoating for sound deadener in my enclosures. And anywhere there's vibration or flex, try to isolate and stiffen with foam and or deadener. You'll just keep gaining output the more you seal and deaden.
Fantastic idea and design man!! I've always thought this would be a game changer on lows.
Really cool! So the basic principle is rotate it slower for deeper frequencies and faster for higher ones to eliminate mechanical noise?
Best rotary sub channel, when you gonna start machining the parts and selling kits?
Not sure
This style of woofer has tremendous drawbacks, but its just so damn cool. Ive wanted to make one for a while but I dont want to start cracking plaster in my house. Easier and safer to get a 24in sub
love where this is going
such a sick project. i think if you took everything but the basket and cone of a traditional sub, maybe a 12 or 15, and used that to drive blade pitch it might be able to respond to some higher frequency stuff. i saw one design with essentially the whole voice coil/spider assembly from a kicker speaker or something in a 3d printed mount that was driving the blade pitch, and it sounded like it was going up to maybe 45hz
You can hear it bottom the mic out when it reaches its ideal frequencies.... That's insane!!! 3:09
I'd make fan blades spin slower and only when bass hits. Need a good motor, though, to run it. So, start and stop is intantly
now we just need a 3d printed fan shroud to look nicer and have a great seal with little vibration
Big step forward, shows proof of concept.
I'd try a smaller fan at the other end of a pipe, maybe defeat some of that self-noise.
What would happen if you made smaller, stouter blades and brackets, as stiff as possible? Titanium is too pricey to play with, so carbon is definitely the way. Maybe add stiffening ribs?
I like ceramic bearings with tungsten disulfide for heim joints under constant repicrocating movement, like in a swash plate.
Linear movement can be had with a big voice coil, like in a tactile transducer, or various kinds of linear actuator. I'm not smart enough to use a digital controller and stepper motor. Raspberry is neat, but escapes me.
Awesome build, love it! Would love to build my own one day, you are a great inspiration :)
Iv always wanted to build a few of these rotary subs . I really love infrasonics. My current build is 2 24" subs and its a huge 6th order enclosure. Its possible to hit down to a single hz in my truck with really good pressure. Problem is i want more pressure. Would like to be able to do 160db under 10hz.
rave on wheels
Ive always wondered why someone doesnt create a tech that changes the ports length/resistance, could use some sort of camera shutter style valve that opens and closes quickly based on bass signal and the length of the port could be changed by using an o-ring style pipe that slides over the outside of the baffle and uses a rail/gear system to lengthen or shorten it in conjunction with the shutter style valve on the end of the port. BUT i am also not a sound expert so i could be completely off base with how this would effect the sound quality.
You could reduce the ambient sound of drag by increasing the surface area of the rotor blades so they create a uniform circle when the pitch is 0°.
Alternatively, I wonder if you could emulate the sharrow propeller design, and how this would effect drag, efficiency, and sound.
I absolutely love the way you think outside of the box this is incredible 🦾🦾🦾🦾
I might have to try this
You should
I want to hear this in person so bad.
The collective unit looks good. (Not sure if there's another name for the pitch adjuster, but same principle as with helicopters.) I'd guess the response is where it needs to be? Looks like the rotor part needs a reduction gear from the driving motor and some kind of fly-weight, it seems to stall at times when pushed hard enough. Either that or a motor with more torque behind it. I don't think it's desirable to have it drop out from that when trying for a sustain, so those things may help with that.
Also it's amusing to see that a bass fan has a bass fan. When all bugs are worked out, maybe that could be a logo sticker for it?
Maybe a shorter coil would limit the movement to stop the mechanical slap like a kind of limiter so it doesn't get outta control or implicate some rubbed isolators
Hi, been watching some of your vids, in this design if you could ad weight to the tips of the blades directly in line with the turning axis of the blade - the fan wouldn't loose so much speed and wouldn't hinder the movement of the blade to much.
And what is the difference if you only use positive or only negative flow instead of both ways? Meaning air moving in just one direction to 0 instead of back and forward like normal speaker.
Due to mechanics of conventional speaker it has to go both ways, but in your case it doesn't so let the port do the work for airflow in one direction.
need to rubber brace around the edges to make them less flimsy eliminating some of the noise
You gotta close the trunk and sit in the drivers seat to get the real vibrations! Another port hole on the 15inch sub box for the rotarys air pressure to go thru the 15nch box and into the cabin without having to open trunk would be really interesting
Im thinking use the sub as passive radiator but it goes through tuned port.
let me know when u start up, would like to invest
Thanks!
@@kristabulle6335 lol, since when did you start watching my videos? 😂😂 JK your the second person to give a super thanks!
@nathanbulle5782 I like watching them in succession. I'm always excited when you put out a new video and you're chill about mistakes and malfunctions. Every invention has to be constantly improved and practice makes perfect 👌
The mad lad is back lol. Does it sound the same/similar on video as it does in real life? It sounded more like a helicopter thwaping my eardrums through my iems. I thought you said something about microphones being a limitation awhile back.
That fan looks killer though. I'd like to see more on how you designed and assembled it
It definitely sounds different in real life. Honestly a lot better too.
Great looking build
Awesome video. I’d love to hear it in person.
I ran one of those Rockville RVA-M2 amps, decent little budget buy. 650w @1 if I remember correctly
Youve done what ive been wanting to do for a long time, nice job! I feel there is a more prctical way to achieving the same outcome. I still want to try this out though. Would love to see this at a meet. Bass on my brother 🔊🙉 🌬
My only issue with this system (as someone that competes in IASCA competitions) is that you're not propagating a sound wave, you're transducing a pressure wave from rotational kinetic energy. The effect is absolutely what people with a "windy" system aim to achieve, the amount of energy required to do hair tricks with this system is well below a quarter of what typical drivers would require. I'd be interested to see if it registers on a Term-LAB.
It's gotta be high tech since its carbon fiber
That's what everyone says lol