@@craigohearn8652 I found a way to remove almost all the fan noise in the most recent build (not on yt yet). The new rotary sub is 18.5" in diameter and makes the car literally grow and shrink rapidly, it's so funny! The result inside the car is a very powerful and pleasant cinematic sound and sensation. It feels like the car is alive on the inside, everything is moving around! Video soon!
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
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 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.
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!
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
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.
@@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 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.
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!
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.
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!
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.
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!
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.
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 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
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
Whatever you're recording audio with did a baffling good job of picking up these low bass notes. I have a pair of high-end 15's for my office stereo that are port tuned to about 18hz, and your testing in the beginning of this had them moving so much air I could feel it across my feet. The walls sounded like they were going to fall in on me.
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
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.
@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 👌
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
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
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!
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.
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.
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!!
@NathanBulle- What impedance is this 17" Rotary Subwoofer? Also, how much power is going to the Rotary Subwoofer? Have you ✔️ed the Db @ 5 Hz, 10 Hz, 15Hz, and 20Hz? With the SPL Meter in passenger side kick panel area, and Driver side window down, should give best results, but try all windows sealed up as well.
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.
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.
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!
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.
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.
In welcher Richtung wird die Luft geblasen? Wenn dann muss der Subwoofer mit dem Ventilator interagieren.Anstatt die Luft in den Kofferraum zu blasen muss die Luft aus dem Kofferraum herausbeschleunigt werden damit das einen vernünftigen Bassreflexeffekt ergibt. Schon mal was im Gegenlaufprinzip ausprobiert? Wie bei einer Druckschallkanone.
Rotierende Subwoofer blasen Luft in beide Richtungen mit der gleichen Frequenz wie der erzeugte Schall. Es ist der Art und Weise, wie ein herkömmlicher Lautsprecher Luft hin und her bewegt, sehr ähnlich, mit der Ausnahme, dass ein rotierender Subwoofer dies mit viel größeren Luftmengen tun kann, da es sich um einen Ventilator handelt. Ich habe darüber nachgedacht, nach dem Vortex-Cannon-Prinzip etwas zu bauen, das ich gerne einen Quantenlautsprecher nenne. Ich bin mir nur noch nicht sicher, wie ich das machen soll. Ich bin mir sicher, dass, wenn ein Vortex-Quantenlautsprecher entwickelt würde, dieser deutlich höhere Amplitudenwerte erreichen könnte als normale Lautsprecher. Leider denke ich, dass ein Vortex-Kanonenlautsprecher ziemlich verzerrt wäre, da die Schallwellen eher auf kräftigen Luftstößen als auf präzisen Luftbewegungen basieren würden.
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.
Does it work with the trunk closed? So that you can drive around and bump it? Seems pretty awesome but maybe some kinda dampener or rubber bands around the end of the linkage to eliminate the clatter...
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.
@@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.
Nice build sir! Here's a suggestion for v3. Since power to weight ratio is a thing, I am thinking that having such wide blades could be hindering the frequency response due to the shear mass of the blades having to change direction so quickly. If it had 10 or 12 narrower blades, maybe it could oscillate much more accurately with less mechanical noise. perhaps even reaching above infrasonic and into audible spectrum. You could still have the same amount of surface area to move the same air, just with more control of the surface area. Can't wait to see if there is a v3.
Is there any feedback on the motor's RPM when the lower notes are played? It seems the spindle RPM decreases when the fan has to push more airflow. FYI, there’s a drill speed controller board called SuperPID that essentially converts a standard drill into a CNC spindle. It works by increasing the current to compensate for the added workload, maintaining a consistent rotational speed. Similarly, implementing some form of feedback on the spindle speed of your rotary subwoofer in a similar way could help stabilise performance for those lower notes.
Now that you have a slip ring in the design, I'm wondering if you can get rid of the voice coil and the blade tilt mechanism and use piezoelectric benders instead.
I really love your designes of the rotary sub but could you make a tutorial how to make them cause i still don´t get the part where you move the whole thing with the speaker coil
Hi Nath ! I'm still trying to build one of these since your vids got out, my first attemps was a failure due to my lack of enginering, i'm still trying to figure out a new design and trying to be inspire by this one, if one day you will share the material of this one, it would mean the world to me. In term of DSP and making the rotary sub usefull with any song I found a way to "create" sub-low frequency. There is a plugins on digital mixing console from behringer named sub octaver, wich "create" sub frequency from Live source. So I was wonderingn if something like that can be used, and yes it is ! I found some VST to use on whatever DAW you Have and use the following chain process: I duplicate the track I want to use, so one will be process and the other one remains untouch. On the process track i'm loading a low pass EQ to like 70 Hertz, then the Sub Octaver wich will pitch one octave down, and finally another Low pass to like 25 Hertz. By this process you have one channel feeding the amp with only Sub frequencies we want (25 to 0 Hz) and the other copy of the song feeding your main sound system, without the need of pitching down a song, or a rebass or whatever ! Thanks again for the inspiration you're giving to me, I hope to get in touch with you one day ! A French BassHead !
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
@@LukeQuin it can play down to 3 I think. Hearing or feeling 1hz is not necessary in any application because you can literally dance at 1hz whenever you want
@@nathanbulle5782 Thanks for the quick reply! That amp has a Subsonic Filter that goes as low as 10Hz. How can you go lower than the lowest value of the Subsonic Filter? Also, how do you filter out the higher frequencies? Sorry for all the questions. I want to build my own rotary sub, but I'm getting stuck on the amp selection.
To increase the performace of that rotary sub i would probably put a 15hz cut on it because you're definately getting some unwanted LF oscillations out of it and i would boost the overall output on the coil, anything 30hz and over. Perhaps you could introduce a parametric EQ with a incline going from 30hz upward. Also just curious, whats the impedance of that coil and it is hand wound or did you buy one off a catologue/AliX?
I'd got down to 15hz and play sond that slowly scales back and forth. I think with better motor it'll work better. Definitely slow fan speed down on lower bass notes or hits.
What is the mechanism that makes the blades rotate? I really want to build a rotary sub but don’t know what that is called. Closest thing I have found is a rc helicopter blade mechanism thingy
@@RandomOrganist687 I designed my own rotating tilting mechanism. You can copy my design if you want, the rotator is am electric skateboard wheel with the rubber tire part cut off
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
@@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
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.
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?
Great work 👍, from what i researched, I believe it can be smaller in size to better fit your set-up (noticed the rear deck blocks .25 air flow behind the motor). Back in day, horns were used under the dash to supplement the mid's and hi's. I see this the same way and think its brilliant to use one of each (sub and fan) playing at its own dominant frequency. I have a question, is the fan motor and voice coil one piece? I noticed the copper windings on the outside 🤔? Looks great and compact, but how did you combine the two if so?
@@dannyvee1596 the motor is the silver thing that the blades are directly around and the voice coil is behind the motor. The voice coil covers a very large neobdenium magnet. I welded a tube that connects the magnet to the motor but there's space in between
@nathanbulle5782 amazing Sir 🫡, that's a huge revamp from the last design Bravo👏👏👏. Keep up the great work and I'll be sharing to help grow your channel 👍
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.
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. ✨✨
I would need to hear this in person ,before I could give my opinion on sound an what you could do to improve it ...I'm in maryland ,so if you happen to be close I'd like to check it out . Interesting idea tho .
Don't know if you're still active but have you ever thought about reversing the polarity loading the trunk with the windows down would love to see and hear that
Next challenge is to minimize/eliminate mechanical noise and safely house it. I'm following!
The noise and resonances will be tricky
I think balancing the blades along their rotating axis would go a long way to help eliminate mechanical noise
@@craigohearn8652 I found a way to remove almost all the fan noise in the most recent build (not on yt yet). The new rotary sub is 18.5" in diameter and makes the car literally grow and shrink rapidly, it's so funny! The result inside the car is a very powerful and pleasant cinematic sound and sensation. It feels like the car is alive on the inside, everything is moving around! Video soon!
@@nathanbulle5782
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
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
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 wish I could experience this in person. 🥰🥰
Same
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)?
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!
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
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.
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.
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!
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'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.
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.
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!
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.
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.
Love these types of builds, thank for putting the effort on creating this beast!
You earned a like from me before I watched the video...Bravo young man, keep going.
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 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
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
Whatever you're recording audio with did a baffling good job of picking up these low bass notes. I have a pair of high-end 15's for my office stereo that are port tuned to about 18hz, and your testing in the beginning of this had them moving so much air I could feel it across my feet. The walls sounded like they were going to fall in on me.
@@Dexter-tx5fp lol, I'm glad I could rock you and your house with my video
Yo thru the headphones those lows are insane..
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
This is really cool, nice seeing different designs and ideas
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.
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 👌
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
"Wake up Nathan has Uploaded again"
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.
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.
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.
great work. algo seems 2 luv it as well 🔥
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!
@NathanBulle- What impedance is this 17" Rotary Subwoofer? Also, how much power is going to the Rotary Subwoofer? Have you ✔️ed the Db @ 5 Hz, 10 Hz, 15Hz, and 20Hz? With the SPL Meter in passenger side kick panel area, and Driver side window down, should give best results, but try all windows sealed up as well.
Dual 4 ohm coil, 145db at 12 hz, loudest with sealed cabin but infinite baffle
@@nathanbulle5782 Wow, Awesome, a 145 Db @ 12 Hz!
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.
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.
She was super clean when she leveled out. Almost there!
I love the design improvements.
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!
This is next level dude. I'm about to put a 24" sub IB though the floor - one of these might be even more impressive. 😱
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.
It sounds like a Helmholtz generator
I only with you were in Central Illinois, so I could hang out and listen to the beast in person.
@@drbirdie I know. I showed it to some older folks and they said it feels like a Disney ride.
try to float something in the window
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.
In welcher Richtung wird die Luft geblasen?
Wenn dann muss der Subwoofer mit dem Ventilator interagieren.Anstatt die Luft in den Kofferraum zu blasen muss die Luft aus dem Kofferraum herausbeschleunigt werden damit das einen vernünftigen Bassreflexeffekt ergibt. Schon mal was im Gegenlaufprinzip ausprobiert? Wie bei einer Druckschallkanone.
Rotierende Subwoofer blasen Luft in beide Richtungen mit der gleichen Frequenz wie der erzeugte Schall. Es ist der Art und Weise, wie ein herkömmlicher Lautsprecher Luft hin und her bewegt, sehr ähnlich, mit der Ausnahme, dass ein rotierender Subwoofer dies mit viel größeren Luftmengen tun kann, da es sich um einen Ventilator handelt. Ich habe darüber nachgedacht, nach dem Vortex-Cannon-Prinzip etwas zu bauen, das ich gerne einen Quantenlautsprecher nenne. Ich bin mir nur noch nicht sicher, wie ich das machen soll. Ich bin mir sicher, dass, wenn ein Vortex-Quantenlautsprecher entwickelt würde, dieser deutlich höhere Amplitudenwerte erreichen könnte als normale Lautsprecher. Leider denke ich, dass ein Vortex-Kanonenlautsprecher ziemlich verzerrt wäre, da die Schallwellen eher auf kräftigen Luftstößen als auf präzisen Luftbewegungen basieren würden.
Would a quad setup reduce the noise? Lower Moving mass allowing for a quieter overall design....
Are you planning on a doing a breakdown video of the new design? Where is the spinning motor? is it the silver cylinder sticking out past the fans?
@@LukeQuin it's a skateboard wheel motor
@@nathanbulle5782 Oh nice. that's really clever.
I need one as a radiator fan lmao, badass stuff! reminds me of that hydraulic cooling fan that can reverse rotations
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.
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.
keep it up! this might be the future!
Does it work with the trunk closed? So that you can drive around and bump it? Seems pretty awesome but maybe some kinda dampener or rubber bands around the end of the linkage to eliminate the clatter...
I need this for my desert parties! Following for sure.
Finally someone did this. Awesome!!!
I came across your channel on the first vision because I was thinking of building one for my jeep
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
Do you sell these? The motor and blade assembly like in this video? Sorry if I asked an obvious question. Thank you.
Nice build sir! Here's a suggestion for v3. Since power to weight ratio is a thing, I am thinking that having such wide blades could be hindering the frequency response due to the shear mass of the blades having to change direction so quickly. If it had 10 or 12 narrower blades, maybe it could oscillate much more accurately with less mechanical noise. perhaps even reaching above infrasonic and into audible spectrum. You could still have the same amount of surface area to move the same air, just with more control of the surface area. Can't wait to see if there is a v3.
@@naturelovertx thanks for your suggestion. V3 already has been designed with 9 blades
@@naturelovertx I will post v3 within a month from now!
Stronger basket for the voicecoil maybe 🤔. I like it!
Is there any feedback on the motor's RPM when the lower notes are played? It seems the spindle RPM decreases when the fan has to push more airflow. FYI, there’s a drill speed controller board called SuperPID that essentially converts a standard drill into a CNC spindle. It works by increasing the current to compensate for the added workload, maintaining a consistent rotational speed. Similarly, implementing some form of feedback on the spindle speed of your rotary subwoofer in a similar way could help stabilise performance for those lower notes.
@@darkstatehk thanks for the advice!
Now that you have a slip ring in the design, I'm wondering if you can get rid of the voice coil and the blade tilt mechanism and use piezoelectric benders instead.
It's a very interesting idea. I wonder if they are strong enough to control the blades
@@nathanbulle5782 If that doesn't work you could try small motors
It is a good idea, in addition to making sound, it cools the amplifiers by working as a fan
Idek what I'm watching but I like it. Keep us updated!
this is incredible! 🇿🇦💚🇵🇸
Very innovative and could be the next big thing in car audio once it is perfected.
@@LongBeard67 new video coming soon!
@ When you’re designing it, imagine your the customer and ask yourself what you would be looking for in that kind of subwoofer and make it happen.
So what’s the 15” and what’s the other?
Repairing DNA in milliseconds! 😁
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
Let’s goooo new upload
I really love your designes of the rotary sub but could you make a tutorial how to make them cause i still don´t get the part where you move the whole thing with the speaker coil
Hi Nath !
I'm still trying to build one of these since your vids got out, my first attemps was a failure due to my lack of enginering, i'm still trying to figure out a new design and trying to be inspire by this one, if one day you will share the material of this one, it would mean the world to me.
In term of DSP and making the rotary sub usefull with any song I found a way to "create" sub-low frequency. There is a plugins on digital mixing console from behringer named sub octaver, wich "create" sub frequency from Live source. So I was wonderingn if something like that can be used, and yes it is ! I found some VST to use on whatever DAW you Have and use the following chain process:
I duplicate the track I want to use, so one will be process and the other one remains untouch.
On the process track i'm loading a low pass EQ to like 70 Hertz, then the Sub Octaver wich will pitch one octave down, and finally another Low pass to like 25 Hertz.
By this process you have one channel feeding the amp with only Sub frequencies we want (25 to 0 Hz) and the other copy of the song feeding your main sound system, without the need of pitching down a song, or a rebass or whatever !
Thanks again for the inspiration you're giving to me, I hope to get in touch with you one day !
A French BassHead !
There's another video on my channel on how to build a smaller rotary subwoofer. It includes parts to make it.
@@nathanbulle5782 I know, I know ;)
Can you tell wich model of skaterboard wheel motor you used ? =D
Also you should try some dub music, these kind of music have pretty low bass :)
@@hybridzofficial6357 a cheap one. I think it's 250w
WE MAKIN IT OUT THE RESONANT FREQUENCY BARRIER WITH THIS ONE
I been watching since v1. Keep up the good work.
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
Best rotary sub channel, when you gonna start machining the parts and selling kits?
Not sure
The listed frequency response of the Rockville RVA-M2 amp is 10Hz - 300Hz. it can play down to 1Hz?
@@LukeQuin it can play down to 3 I think. Hearing or feeling 1hz is not necessary in any application because you can literally dance at 1hz whenever you want
@@nathanbulle5782 Thanks for the quick reply! That amp has a Subsonic Filter that goes as low as 10Hz. How can you go lower than the lowest value of the Subsonic Filter? Also, how do you filter out the higher frequencies? Sorry for all the questions. I want to build my own rotary sub, but I'm getting stuck on the amp selection.
@@LukeQuin you can use a 1000 uf capacitor and a 10 ohm resistor on the input of the amp to filter any unwanted high bass frequencies.
To increase the performace of that rotary sub i would probably put a 15hz cut on it because you're definately getting some unwanted LF oscillations out of it and i would boost the overall output on the coil, anything 30hz and over.
Perhaps you could introduce a parametric EQ with a incline going from 30hz upward. Also just curious, whats the impedance of that coil and it is hand wound or did you buy one off a catologue/AliX?
Dual 4 ohm
I'd got down to 15hz and play sond that slowly scales back and forth. I think with better motor it'll work better. Definitely slow fan speed down on lower bass notes or hits.
What is the mechanism that makes the blades rotate? I really want to build a rotary sub but don’t know what that is called. Closest thing I have found is a rc helicopter blade mechanism thingy
@@RandomOrganist687 I designed my own rotating tilting mechanism. You can copy my design if you want, the rotator is am electric skateboard wheel with the rubber tire part cut off
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.
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?
That is really impressive!
Awesome build, love it! Would love to build my own one day, you are a great inspiration :)
Great work 👍, from what i researched, I believe it can be smaller in size to better fit your set-up (noticed the rear deck blocks .25 air flow behind the motor).
Back in day, horns were used under the dash to supplement the mid's and hi's. I see this the same way and think its brilliant to use one of each (sub and fan) playing at its own dominant frequency.
I have a question, is the fan motor and voice coil one piece? I noticed the copper windings on the outside 🤔? Looks great and compact, but how did you combine the two if so?
@@dannyvee1596 the motor is the silver thing that the blades are directly around and the voice coil is behind the motor. The voice coil covers a very large neobdenium magnet. I welded a tube that connects the magnet to the motor but there's space in between
@nathanbulle5782 amazing Sir 🫡, that's a huge revamp from the last design Bravo👏👏👏. Keep up the great work and I'll be sharing to help grow your channel 👍
@@dannyvee1596 thanks! My next project is replacing the 6 inch rear speakers in my car with 6 inch rotary subs!
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.
What song was used for the bass test at 2:40? I don't think it's the song in the description.
It's just called bass test I think
th-cam.com/video/Wi8YjtSAmt0/w-d-xo.htmlsi=66UhbXeUg4WH6wOH
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 😂🙌🏼
Could you incorporate a sunroof somehow? Put the rotary right under a sunroof, and when you open the sunroof you have open air?
Ive been testing some 10hz mini sub horns and i can tell you that the infra that im getting is insane!
I WISH I COULD HEAR THAT WITH MY OWN EARS‼️
So what you're telling me is that if I have servos on my rear windows while I'm driving on the highway, I can have a subwoofer?
@@PortalJumper5 transducers would be best. However, car windows are not the most flexible things so it's hard to get really really low bass with that
Really cool! So the basic principle is rotate it slower for deeper frequencies and faster for higher ones to eliminate mechanical noise?
I would need to hear this in person ,before I could give my opinion on sound an what you could do to improve it ...I'm in maryland ,so if you happen to be close I'd like to check it out . Interesting idea tho .
Toroidal fan next? Just kidding, great work!
Don't know if you're still active but have you ever thought about reversing the polarity loading the trunk with the windows down would love to see and hear that
@@finessetheekid7625 I've tried with the windows down but not much happens