their worthless trash actually. the only reason you can hear anything is because he ripped a speaker apart and jury rigged it to the back of that fan, but the actual rotary woofers dont output sound. they direct extremely high velocity pulsed air into a support column, which induces vibration through the entire foundation and walls, which is then perceived as sound, but still isnt. this idiot just ripped up a speaker and threw it in a window, but thats absolutely not how these devices work.
@@FingerinUrDaughter Look up rotary woofer on Wikipedia. It's an established thing for generating very low frequencies, the kind you can feel in your body.
I remember when UA-cam wasn't even owned by Google😢 it was like tiktok. Just random stuff from people.. but I'm talking about the beginning of a tiktok. It's just pure advertisements niw
@@martingo2680back when every video was a gamble, would Rick be hypnotizing us with timeless vocals and bass or would a backyard scientist actually go critical with their smoke detector reactor. Good times.
You could still use car parts from a junkyard, grabbing a couple of identical flywheels from manual transmission cars to help keep the motors at a constant RPM while producing sound waves. Using Automotive flywheels like that, most of them are balanced for use at thousands of RPMs, speeds you'll never need with that setup.
They're balanced for thousands of RPMs, but they're also sized for thousands of RPMs which would make them less suitable for this application. They'd probably still work, but it would be pretty hard to integrate them.
I wish some company would make these for concerts and theaters. These subs are awesome, and I love to see more people making them, engineering them, and just experimenting to make them better.
Because these require a space outside the listening area to vent air into and out of. This means you either send a lot of noise pollution outside as seen in this video. Or, contain it in a second large empty room adjacent to the listening area. This is much less cost effective than using a standard reflex sub tuned to low infra sub frequencies. Also this can't be used for outdoor environments unless you made a very large wall that separates all the energy from the front of the fan from the back of the fan.
I've been an audiohead for years. I owned Bose, B&O, Pioneer and many others. I have never heard of this and honestly, I thought it was a joke. I researched and and wow. That is pretty amazing for the science involved vs concept and the application. Nice work
@@SoylentGamer you mean KHz, what they actually struggle with is anything below 60 hz and they’re boomy around 80-120hz to counteract it. By no means a flat response. Efficient design but useless if you want to hear what the producer wanted you to hear.
I wonder what would happen if you put a little big of fog in the room to see how the air was moving. I'd love to see a fluid simulation and see just how that little device is moving so much freaking air
This! Or something along these lines. I had never heard of these and I am very curious how well it works, something that is unfortunately not really easily captured through video. Best I could come up with was something like an air balloon on a string or perhaps a candle to Mahe the waves visible.
@@danielfajkis4952 as i was telling nathan i the 3" video... its not just the mass but the balancing of the blades. pivot them along the CofG, and the only load is the mass of them, air pressure equalising on either side of the pivot. im of the opinion they should be flaps cut from a solid sheet, cover the port when neutral. but despite knowing of them for at least a decade... havent made one! i just know theyre closer to a helicopter than anything. the power is required to spin them, not flap the blades. i really should put my money where my mouth is and have a go myself. effing keyboard warriors! got a bunch of RC swashplates hanging around... i was MEANT to be making a collective pitch quad! lol, the irony of subsonic speaker demonstrations on dodgy 8 inchers... with the bass turned down cus i hate voices all boomy.
This sounds truly impressive even on video. I would love to experience it IRL, how does it feel in your body? I imagine this must feel more impressive than ordinary subwoofers!
Sounds amazing like driving down the motorway with one single window wide open. Nice using the room as a Helmholtz resonance chamber, depending on the things inside, it could rattle things like hell.
I remember seeing a video a long time ago where a guy built this sort of thing in the space between his walls and said a similar system would run upwards of $25,000. You, sir, are magnificent.
I remember seeing this being developed for commercial cinema use ten or so years ago. The commercial team used a DA converter and/or PPM/PCM to servos if I remember, basically a helicopter rotor head mechanism. it was sizable too. Definitely a digital drive. 10% distortion did not matter being that is was subsonics.
That's incredible, I had to turn my bass down a bit. I was amazed at the lows this produced because I had to put my hand down and feel like 15hz since you can't hear it. Interesting how it seems a bit tame the way it's not rattle the doors or anything.
Well, unless you have one of these rotor subs…you wouldn’t hear it anyway unless your sub could plummet below 20 and that just doesn’t happen. Your sub may flop at 15hz or 18hz but isn’t loading the air.
Interesting. Would have been nice to see a frequency response curve. Also be nice to seen this vs the same coils, but used in the conventional way, also mounted in your window.
It is interesting that subwoofers can be created like this, since technically that is what a subwoofer does, it moves air and thanks to the cajon it intones the air that moves it and creates that beautiful bass tone. It is something that they wanted to use a long time ago but for aesthetics it was never used
I've got some old 700 size collective pitch helicopters. I've always wanted to put 3 tail servos (usually fast af) in place of the collective/cyclic servos, build an enclosure with a 700mm hole and modulate the servos to make some tones. Lotta power... one day
I'd love to see some of these in home theater use for infrasonic bass. Would be cool to experience the lung-emptying bass that some massive subs have down below 20Hz. Awesome setup, can't wait to see more!
Definitely some of the highest frequency rotaries I've ever seen, probably due to the lightweight 3D print. Every other rotary sub I've seen doesn't play past like 15Hz before wanting to rip itself apart, nice to see them used for audible sub bass for once. Well done on this build, I'm super jealous! I can only just about appreciate infrasonic thanks to a Dayton Audio BST-1 I've strapped to my chair lol. Effective minimum frequency I can feel is ~26Hz, after which it rapidly rolls off to about 12Hz. Not too bad... But I've wanted to build a rotary for years. Shame my windows are not suitable for it :( I have a question though, what (if anything) would you do about the blade speed bogging under high excursion? Especially in that last test, you could tell the fans were slowing down significantly due to the the aero load. Only solution I can think of is using large BLDC motors with a high current ESC, but that'd definitely bump the power draw far beyond 80W and I don't think the ESC would like the rapid current spikes lmao.
I've had a lot of people on UA-cam saying the blade speed going down is a problem. The blade speed being slowed is however not an issue. This is because there is a large range of speeds that produce the same amplitude of sound. I found that running the blades so slowly that you can see the rotation (i.e. it's not blurry) produces almost the same amplitude of sound. Likewise, running it super fast (very terrifying and loud fan sound) produces the same amplitude. The only difference that higher fan speeds make is that the rotary can play higher frequencies (i.e. the rotary running on 24 volts rather than 12 increases its range from 50hz to 100hz). These low power motors are plenty strong enough. The ratio for coil power to motor power is 3 to 1. If your coil can handle 90 watts, choose a 30 watt motor. Does this answer your questions?
I guess lower fan speeds are quieter in terms of fan noise, which could be a benefit as usually these things are located away from the listening area, in which case frequencies you can hear are played by regular drivers.@@nathanbulle5782
@@nathanbulle5782 Ah. fair enough regarding the amplitude. It's hard to get a sense of the amplitude changes based on deflection through a video, but I'm inclined to believe you since you've got (literally infinitely more) real world experience with rotary subs than I do. Completely removes the need of using a BLDC motor and a dedicated driver, so yeah that answered my questions perfectly, thank you haha. My windows don't slide in any direction, they open outwards on a hinge. Unless I completely take off the window (impractical and unsightly since it's facing the front of the house), it's just not accessible sadly. I do have a wardrobe built into the wall and it has quite a large internal volume but nothing will even come close to the infinite baffle of having it point out the window. Thank you for your responses
Ingeniously. Well done! What an approach. The besutiful thing is that the zero point will be found by the rotation rather than suspension. The volume of air moved by this way of bass coupling must be enormous.
This is some next level engineering. To take this from concept to reality is a huge accomplishment, endorphins would have been awesome when you heard your creation for the first time. I see you've made videos on how you did this, will be watching!
Neighbor: "WHAT'S GOING ON IN THERE?!" Other neighbor "Oh, they must be doing laundry again!" Sweet device though, I've been fascinated with these for years!
WOW i'm impressed by the result already on the first song when the blades startet to spin. I thought that would just be nice little neat thing for demonstration but that would be useable for example in big Party rooms. Can you also hear that loudly from the outside or only on the inside? Could you please make a another video on how you build them and so on? Edit: I see you already made a video on how to build it haha
This is sick, first I've ever seen or heard of a rotary subwoofer. I'm in AZ too, glad there's cool stuff like this around. Also, Legion is an absolute banger..
First off, thanks so much for the video and build! I absolutely love it, and it’s a shame people aren’t able to see or feel the amount of force something like this truly creates! If you ever wanted to level up from here, I’d recommend you’d use a rotary linear bearing attached to the woofers shaft, going to a rubber timing belt, connected to a remote motor and flywheel thus removing the need for as complicated woofer design , and spending more space and time on the voice coil design and prints. You could run some big ass coils (3” sundown or similar) and have more than adequate cooling, and use a Neodymium magnet and steel plate as the motor to save even more space and have more Bl (force). The final thing left would be making a mold for some carbon fiber fan blades, and maybe using brims joints with some lightweight carbon fiber rods from Amazon to connect it all. I just mentioned the flywheel in my last comment (weighs close to 200lbs) and is flat down to 0.05 microns 😂
I love how it's basically an helicopter turned subwoofer. Speaking of, if you can get a governor going on (or even just a flywheel as another person mentioned) it would likely improve it further.
Wow, thanks for sharing, I don't fully understand how this works, let alone how to hook it up to an amp and how to drive it, but I think it's amazing, I've seen a model installed in a door years ago and was blown away fascinated, do you intend to make a permanent installation?
Its hard to judge performance from video, but its a cool idea. I do know that more blades produce less noise, whether from a fan or even a helicopter prop. Might be worth checking out to see if 5 or more is doable in your design.
Nathan's Mom: NATHAN! Turn that down! Mrs. Griffin, two houses down, already claims you broke three of her Precious Moments figurines. She doesn't like us, as it is.
I have two of those Harmon Kardon speakers, I absolutely LOVE them. I've always been intrigued by Rotory subs, never seen them placed in a window before
@@coaber yeah, just one of the woofer fans can cause ear damage when played at 18 hz. I did this once at full volume and it felt like someone had connected a bicycle pump to my ears it was an insane amount of pressure.
The only thing I could think about while watching this is that you could make a wicked haunted house for Halloween with something like this. I read in the past that subsonics can produce creepy "invisible presence" effects in the mind that could be the origin of some ghost stories.
I just drilled through the entire shaft. It is much easier than you would expect. First you turn on the motor and start the hole with a tiny drill bit (this centers the hole). Them you hold the desired size of drill bit with a vice grip and use the motor to drill itself the rest of the way. I recommend using cutting oil.
I'm also trying out different designs for this. If you see my video about the smallest rotary subwoofer you'll see another design I tried. It's quite different from the original.
@@nathanbulle5782 Actually no. I stand corrected. After doing research I see a few other DIY designs using the directional blades. I am used to the fixed blade rotaries that actually change rotation such as the Phoenix Gold Cyclone. Still very cool Yours was the first time I have seen the bearing with the coil method. I didn't even know it was a thing. I think the other method uses a type of DC motor running on AC current.
@@nathanbulle5782 The cyclone IS a rotary sub. That's what I am trying to tell you. Older rotary subs didn't have a coil and a spider. What you built is some kind of hybrid design. That's why it took me for a second. I looked them up on google and see a couple others like yours and they are DIY designs. Go look at older rotary designs and you will see what I mean. Theres a reason the original rotaries aren't in use anymore and that is efficiency and new technologies that allow our piston motor subs reach low frequencies. That is likely why the design you are using was created as sort of an in between. Still very inefficient however.
What if you had two duct fans going in opposite directions? Add a T junction after the output, and solenoid or servo driven flap valves inside the junctions. The airflow comes into the junction from outside (= inside, for the other fan) after which the flap makes it either loop back outside (= back inside), or increase pressure in the house (= decrease pressure in the house). You could generate some huge SPL with this kind of setup!
"If you wanna have a sneaky smoke, just go in the laundry." "Nobody will know?" "Nah you're safe. just be sneaky" *turns on extractor fan* "BABE NO!!!"
UA-cam algorithm doings its job! I hope this blows up, it's an unique idea that I haven't heard of being done by anyone else, yet! After looking through comments I learned its not a new idea, still very interesting!
In the early part of the video I was like "Well this is just another design of no use". But when I heard the drop, I was impressed. Would like to experience the subwoofers in real life.
I held off on commenting "what's the point of this, this is dumb." And after reading a few comments I've landed on "i just don't think the juice is worth the squeeze on this one tbh" but you do your thing bro. It's better then going out and finding trouble.
These are the new age CB devices. There's so much bandwidth going through the air the range of frequencies that can be used as citizen bands, encrypted or not, is immense compared to previous CB radio technology.
This awesome 👍 They need these at clubs and concerts. Also it seems the blades don’t like to flip back-and-forth and change direction. They’re making some sound that sound similar to tearing paper. Maybe they need to be stiffer or more aerodynamic angles
I am very curious how you coupled the blade actuator to the hub with a 3d print that isn't shattering from the forces there. Would be a ton of fun to try
Fascinating. Rather than having a bigger surface to move more air, you literally have an already-spinning fan to really move more air.
yeah its so cool :)
That's it? It's just a fan doing that? What the horse shit?
yeah man they are the most efficient sub you can get for infrasonics and near infra. By a long shot.
their worthless trash actually. the only reason you can hear anything is because he ripped a speaker apart and jury rigged it to the back of that fan, but the actual rotary woofers dont output sound. they direct extremely high velocity pulsed air into a support column, which induces vibration through the entire foundation and walls, which is then perceived as sound, but still isnt. this idiot just ripped up a speaker and threw it in a window, but thats absolutely not how these devices work.
@@FingerinUrDaughter Look up rotary woofer on Wikipedia. It's an established thing for generating very low frequencies, the kind you can feel in your body.
This gives 2007 UA-cam vibes. Just regular people making cool stuff.
I remember when UA-cam wasn't even owned by Google😢 it was like tiktok. Just random stuff from people.. but I'm talking about the beginning of a tiktok. It's just pure advertisements niw
@@martingo2680back when every video was a gamble, would Rick be hypnotizing us with timeless vocals and bass or would a backyard scientist actually go critical with their smoke detector reactor. Good times.
How many of you want a video explaining how to build one of these?
Ye seems so weird but cool
Just make the video.
@@emiel333 Are you shore about dat??
@@nathanbulle5782 Yeah.
I'd definitely like to see. That laundry room is bumping!
Would be interesting to see how much the RPM drops when its playing vs when standby. Maybe a flywheel could help keep it sounding more consistent
You could still use car parts from a junkyard, grabbing a couple of identical flywheels from manual transmission cars to help keep the motors at a constant RPM while producing sound waves. Using Automotive flywheels like that, most of them are balanced for use at thousands of RPMs, speeds you'll never need with that setup.
They're balanced for thousands of RPMs, but they're also sized for thousands of RPMs which would make them less suitable for this application. They'd probably still work, but it would be pretty hard to integrate them.
a flywheel would add a lot weight, not what you want on something moving multiple time in milliseconds
@@dh2032the flywheel would only be locked to the shaft's rotation, no impacts on the capability's of the subwoofer to produce sound
@@GewelReal that's almost exactly what I was going to say.
I wish some company would make these for concerts and theaters. These subs are awesome, and I love to see more people making them, engineering them, and just experimenting to make them better.
There is a company that does this. They had their product on the market for over 20 years.
I might sell these in the future for $300 a piece. I don't want to make the same mistake eminent technologies made by pricing them at $12,000 a piece
Because these require a space outside the listening area to vent air into and out of. This means you either send a lot of noise pollution outside as seen in this video. Or, contain it in a second large empty room adjacent to the listening area. This is much less cost effective than using a standard reflex sub tuned to low infra sub frequencies. Also this can't be used for outdoor environments unless you made a very large wall that separates all the energy from the front of the fan from the back of the fan.
So they're the ideal subwoofers for cars, then? 🤣
@@Wiiplay123 lol that would be an awesome application
I've been an audiohead for years. I owned Bose, B&O, Pioneer and many others. I have never heard of this and honestly, I thought it was a joke. I researched and and wow. That is pretty amazing for the science involved vs concept and the application. Nice work
They struggle to produce frequencies above 20hz, but for below 20, they're by far the most compact and efficient design
If you own this junk, you are for sure no audiohead. 🤣🤣
Bose and b&o are for people who think they like audio, big money marketing shit equipment imo
@@SoylentGamer you mean KHz, what they actually struggle with is anything below 60 hz and they’re boomy around 80-120hz to counteract it. By no means a flat response. Efficient design but useless if you want to hear what the producer wanted you to hear.
@@Mapa356 hello fake expert, nice to meet you
I wonder what would happen if you put a little big of fog in the room to see how the air was moving.
I'd love to see a fluid simulation and see just how that little device is moving so much freaking air
This! Or something along these lines.
I had never heard of these and I am very curious how well it works, something that is unfortunately not really easily captured through video.
Best I could come up with was something like an air balloon on a string or perhaps a candle to Mahe the waves visible.
Yes pls
Laminar flow towards the dryer pump
Never knew this type of subwoofer existed, but definitely worth attempting as a personal DIY project. This is very very cool and sounds amazing.
Phoenix Gold made some for car audio many years ago.
How do you know that it sounds amazing?
@@TheSynged That's more of a servo sub.
@@TheSynged But other than that also still a very cool design.
@@IzzyBone10000 no it's not.
You can hear how the bass just turns massively up when you turn the fans on just wow
That kicks ass, surprising to me how high they can play. As soon as my rotary sub exceeds 12hz it wants to tear apart the blade actuator mechanism
The reason they play so high is because the blades and actuator mechanism combined weigh the same as a standard subwoofer cone assembly
@@nathanbulle5782 true true, mines is all metal
try to use more rigide and light weight material
@@danielfajkis4952 as i was telling nathan i the 3" video... its not just the mass but the balancing of the blades. pivot them along the CofG, and the only load is the mass of them, air pressure equalising on either side of the pivot.
im of the opinion they should be flaps cut from a solid sheet, cover the port when neutral.
but despite knowing of them for at least a decade... havent made one! i just know theyre closer to a helicopter than anything. the power is required to spin them, not flap the blades.
i really should put my money where my mouth is and have a go myself. effing keyboard warriors! got a bunch of RC swashplates hanging around... i was MEANT to be making a collective pitch quad!
lol, the irony of subsonic speaker demonstrations on dodgy 8 inchers... with the bass turned down cus i hate voices all boomy.
Thanks for playing music on those
That sounds insane!! It’s like controlled buffeting. I absolutely love it!!!
This sounds truly impressive even on video. I would love to experience it IRL, how does it feel in your body? I imagine this must feel more impressive than ordinary subwoofers!
Do you live in Az?
@@nathanbulle5782 unfortunately not, I'm across the pond haha
@@tigerelectronics5966 ahh man 😞
@@nathanbulle5782 i do
Is it a lot more powerful than a normal subwoofer??
Sounds amazing like driving down the motorway with one single window wide open. Nice using the room as a Helmholtz resonance chamber, depending on the things inside, it could rattle things like hell.
AKA free air design
That's a really neat project. I'm glad someone else is trying this concept out. How did you engineer the blade tilt mechanism?
I engineered the mechanism on solidworks
i imagine its pretty similar to how the collective in a helicopter works?
@@abysswalker2403 It looks like it, basically a very stripped down swashplate with only 1 degree of freedom controlled by the driver.
I remember seeing a video a long time ago where a guy built this sort of thing in the space between his walls and said a similar system would run upwards of $25,000.
You, sir, are magnificent.
I remember seeing this being developed for commercial cinema use ten or so years ago.
The commercial team used a DA converter and/or PPM/PCM to servos if I remember, basically a helicopter rotor head mechanism. it was sizable too.
Definitely a digital drive. 10% distortion did not matter being that is was subsonics.
That's incredible, I had to turn my bass down a bit. I was amazed at the lows this produced because I had to put my hand down and feel like 15hz since you can't hear it. Interesting how it seems a bit tame the way it's not rattle the doors or anything.
Well, unless you have one of these rotor subs…you wouldn’t hear it anyway unless your sub could plummet below 20 and that just doesn’t happen. Your sub may flop at 15hz or 18hz but isn’t loading the air.
Interesting. Would have been nice to see a frequency response curve. Also be nice to seen this vs the same coils, but used in the conventional way, also mounted in your window.
Wow. I don't know what I was expecting, but I wasn't expecting that. That is a lot of clean sounding bass! Great video!
It is interesting that subwoofers can be created like this, since technically that is what a subwoofer does, it moves air and thanks to the cajon it intones the air that moves it and creates that beautiful bass tone.
It is something that they wanted to use a long time ago but for aesthetics it was never used
I've got some old 700 size collective pitch helicopters. I've always wanted to put 3 tail servos (usually fast af) in place of the collective/cyclic servos, build an enclosure with a 700mm hole and modulate the servos to make some tones. Lotta power... one day
I noticed the fan speed dropping when the it hits hard. that's very cool and educational. brilliant work
I'd love to see some of these in home theater use for infrasonic bass. Would be cool to experience the lung-emptying bass that some massive subs have down below 20Hz. Awesome setup, can't wait to see more!
Definitely some of the highest frequency rotaries I've ever seen, probably due to the lightweight 3D print. Every other rotary sub I've seen doesn't play past like 15Hz before wanting to rip itself apart, nice to see them used for audible sub bass for once. Well done on this build, I'm super jealous! I can only just about appreciate infrasonic thanks to a Dayton Audio BST-1 I've strapped to my chair lol. Effective minimum frequency I can feel is ~26Hz, after which it rapidly rolls off to about 12Hz. Not too bad... But I've wanted to build a rotary for years. Shame my windows are not suitable for it :(
I have a question though, what (if anything) would you do about the blade speed bogging under high excursion? Especially in that last test, you could tell the fans were slowing down significantly due to the the aero load. Only solution I can think of is using large BLDC motors with a high current ESC, but that'd definitely bump the power draw far beyond 80W and I don't think the ESC would like the rapid current spikes lmao.
I've had a lot of people on UA-cam saying the blade speed going down is a problem. The blade speed being slowed is however not an issue. This is because there is a large range of speeds that produce the same amplitude of sound. I found that running the blades so slowly that you can see the rotation (i.e. it's not blurry) produces almost the same amplitude of sound. Likewise, running it super fast (very terrifying and loud fan sound) produces the same amplitude. The only difference that higher fan speeds make is that the rotary can play higher frequencies (i.e. the rotary running on 24 volts rather than 12 increases its range from 50hz to 100hz). These low power motors are plenty strong enough. The ratio for coil power to motor power is 3 to 1. If your coil can handle 90 watts, choose a 30 watt motor. Does this answer your questions?
Also, if your windows can open, then they are suitable. A single rotary sub only weighs about 4 pounds.
I guess lower fan speeds are quieter in terms of fan noise, which could be a benefit as usually these things are located away from the listening area, in which case frequencies you can hear are played by regular drivers.@@nathanbulle5782
@@nathanbulle5782 Ah. fair enough regarding the amplitude. It's hard to get a sense of the amplitude changes based on deflection through a video, but I'm inclined to believe you since you've got (literally infinitely more) real world experience with rotary subs than I do. Completely removes the need of using a BLDC motor and a dedicated driver, so yeah that answered my questions perfectly, thank you haha.
My windows don't slide in any direction, they open outwards on a hinge. Unless I completely take off the window (impractical and unsightly since it's facing the front of the house), it's just not accessible sadly. I do have a wardrobe built into the wall and it has quite a large internal volume but nothing will even come close to the infinite baffle of having it point out the window.
Thank you for your responses
@@_XRMissie if your windows open at least 30 degrees then they still could work
This is absolute insanity! Bravo for making these!
Cool - I heard of these about 15y ago but now I finally have an idea how they actually work! Very well done indeed
Ingeniously. Well done! What an approach. The besutiful thing is that the zero point will be found by the rotation rather than suspension. The volume of air
moved by this way of bass coupling must be enormous.
So it basically turns your house into a tuning fork. I dig it, good vibrations!!!!!!!
This is some next level engineering. To take this from concept to reality is a huge accomplishment, endorphins would have been awesome when you heard your creation for the first time. I see you've made videos on how you did this, will be watching!
Neighbor: "WHAT'S GOING ON IN THERE?!" Other neighbor "Oh, they must be doing laundry again!" Sweet device though, I've been fascinated with these for years!
This is extremely cool and I love this idea being put into action
WOW i'm impressed by the result already on the first song when the blades startet to spin. I thought that would just be nice little neat thing for demonstration but that would be useable for example in big Party rooms.
Can you also hear that loudly from the outside or only on the inside?
Could you please make a another video on how you build them and so on?
Edit: I see you already made a video on how to build it haha
The infrasonic is audible outside
This is sick, first I've ever seen or heard of a rotary subwoofer. I'm in AZ too, glad there's cool stuff like this around.
Also, Legion is an absolute banger..
First off, thanks so much for the video and build! I absolutely love it, and it’s a shame people aren’t able to see or feel the amount of force something like this truly creates!
If you ever wanted to level up from here, I’d recommend you’d use a rotary linear bearing attached to the woofers shaft, going to a rubber timing belt, connected to a remote motor and flywheel thus removing the need for as complicated woofer design , and spending more space and time on the voice coil design and prints. You could run some big ass coils (3” sundown or similar) and have more than adequate cooling, and use a Neodymium magnet and steel plate as the motor to save even more space and have more Bl (force). The final thing left would be making a mold for some carbon fiber fan blades, and maybe using brims joints with some lightweight carbon fiber rods from Amazon to connect it all.
I just mentioned the flywheel in my last comment (weighs close to 200lbs) and is flat down to 0.05 microns 😂
I love how it's basically an helicopter turned subwoofer. Speaking of, if you can get a governor going on (or even just a flywheel as another person mentioned) it would likely improve it further.
Imagine a ceiling fan as a rotary subwoofer
Needs a baffle. Think attic fan instead 😅
Speed, amount of pitch needed, and surface area, not to mention mass. All contribute.
One day I wanna try a 32” version of it.
fr same
ayy bassotronics
I first read about rotary subs about 20 odd years ago, read about it in the speed and sound magazine. Good job here.
Wow… even through my phone with no earphones or buds in that shyt was crankin!! Man house parties will never be the same!!
Wow, thanks for sharing, I don't fully understand how this works, let alone how to hook it up to an amp and how to drive it, but I think it's amazing, I've seen a model installed in a door years ago and was blown away fascinated, do you intend to make a permanent installation?
Probably when I buy a house with an attic
@@nathanbulle5782 oooh that'd be nice in the attic
Basement too
Its hard to judge performance from video, but its a cool idea. I do know that more blades produce less noise, whether from a fan or even a helicopter prop. Might be worth checking out to see if 5 or more is doable in your design.
More smaller blades might also have less rotational inertia give it better frequency response.
...... wait next episode the bass copter
Nathan's Mom: NATHAN! Turn that down! Mrs. Griffin, two houses down, already claims you broke three of her Precious Moments figurines. She doesn't like us, as it is.
I have two of those Harmon Kardon speakers, I absolutely LOVE them. I've always been intrigued by Rotory subs, never seen them placed in a window before
Are you saying Harmon kardon makes rotary subs?
He's talking about your speaker sitting on the washer
@@drpritchett91ify ohh lol
Those things are nuts. Any chance we could get a video on how to build these?
That's exactly what I'll be doing very soon! and it should only cost about $40
@@nathanbulle5782 that's great to hear. it's very promising how much bass these thing seem to crank up.
@@coaber yeah, just one of the woofer fans can cause ear damage when played at 18 hz. I did this once at full volume and it felt like someone had connected a bicycle pump to my ears it was an insane amount of pressure.
Damn! That kicks big ass with ease
Imagine someone pulls up in a car with 12 of these bad boys installed 😂
Brilliant idea, and a well engineered execution of it. Must get out my headphones to listen properly.
se escucha increíble ese bajo, nunca había visto algo asi :)
This is very impressive you should play some infrasonics on them ❤ 10 hz and below 💪💪
bro keep it up, these look dope, love the idea!!
A decremental frequency test track would really help demonstrate the effectiveness of these subs. There's several here on youtube.
Now put this on a car
Awesome choice of music, that sounds absolutely badass! Wish my earbuds had that kind of base.
The only thing I could think about while watching this is that you could make a wicked haunted house for Halloween with something like this. I read in the past that subsonics can produce creepy "invisible presence" effects in the mind that could be the origin of some ghost stories.
Cool design, but where did you get the hollow shaft motor?
I just drilled through the entire shaft. It is much easier than you would expect. First you turn on the motor and start the hole with a tiny drill bit (this centers the hole). Them you hold the desired size of drill bit with a vice grip and use the motor to drill itself the rest of the way. I recommend using cutting oil.
Is this your design? If so I would patent it. It seems much different than your typical rotary subwoofer from the good old days.
I was thinking about parenting it and featuring it as a car audio upgrade. Is the design different enough to patent?
I'm also trying out different designs for this. If you see my video about the smallest rotary subwoofer you'll see another design I tried. It's quite different from the original.
@@nathanbulle5782 Actually no. I stand corrected. After doing research I see a few other DIY designs using the directional blades. I am used to the fixed blade rotaries that actually change rotation such as the Phoenix Gold Cyclone. Still very cool Yours was the first time I have seen the bearing with the coil method. I didn't even know it was a thing. I think the other method uses a type of DC motor running on AC current.
I did some research on the cyclone sub because I didn't know how those work but they seem easier to build than a rotary sub
@@nathanbulle5782 The cyclone IS a rotary sub. That's what I am trying to tell you. Older rotary subs didn't have a coil and a spider. What you built is some kind of hybrid design. That's why it took me for a second. I looked them up on google and see a couple others like yours and they are DIY designs. Go look at older rotary designs and you will see what I mean.
Theres a reason the original rotaries aren't in use anymore and that is efficiency and new technologies that allow our piston motor subs reach low frequencies. That is likely why the design you are using was created as sort of an in between. Still very inefficient however.
That's amazing man! Never heard about this subwoofer, i thought it was like a clickbait video but then i clicked on it, best decision of my life.
Never thought I would see a new kind of subwoofer. This is freeking awesome.
What if you had two duct fans going in opposite directions? Add a T junction after the output, and solenoid or servo driven flap valves inside the junctions. The airflow comes into the junction from outside (= inside, for the other fan) after which the flap makes it either loop back outside (= back inside), or increase pressure in the house (= decrease pressure in the house).
You could generate some huge SPL with this kind of setup!
Replying to @maraz666:
**DARZHNARZHERFLARVERSHARVER??
DARZHNARZHERFLARVERSHARVER??**
I might need a visual of this. Sounds interesting
@@nathanbulle5782 i.imgur.com/dozCWXr.png
when the bass sounds legit even on a 480p feature phone camera mic, you know it's real
The microphone is revealed at 5:21.
Woa this video feels like it was made decades ago surprised its new! Looks awesome
That's what happens when a poor person builds an audio novelty
First time I've seen these. Very cool concept. Thanks so much for sharing
It goes to show what these are capable of. Very nice set you've made. Hat's off
Really interesting project! Thanks for posting this.
hell yeah brother love it!
"If you wanna have a sneaky smoke, just go in the laundry."
"Nobody will know?"
"Nah you're safe. just be sneaky"
*turns on extractor fan*
"BABE NO!!!"
what a crazy idea, it's impressive that it actually works, congratulations !!
With headphones on the difference in playing legion with and without spinning is truly massive...
So you just made your laundry room into a speaker cabinet. This opens up so many possibilities..
I am amazed on how well those are staying together despite the higher frequencies involved
I went to a rave in Brooklyn in 1993 and they had a row of these installed in several roof vents. Plastic Dreams by Jaydee sounded..... just wow.
UA-cam algorithm doings its job! I hope this blows up, it's an unique idea that I haven't heard of being done by anyone else, yet!
After looking through comments I learned its not a new idea, still very interesting!
i made these back in 2015 and have videos on here too. well done
Can you post the link? I want to check it out.
@@nathanbulle5782 ua-cam.com/play/PL0EN9aUB2BJRQtnCL0HF90ROZmfVWZYGj.html&si=jTd93Elb6_c7qIV8
In the early part of the video I was like "Well this is just another design of no use". But when I heard the drop, I was impressed. Would like to experience the subwoofers in real life.
Extremely interesting and amazing.. thank you for all of this demo as well
Bro it sounds phenomenal
Awesome job that sounded clean even through my headphones
Wow that's a really cool concept.
this is such a brilliant idea, what an innovative engineering insight!
Sound experiments and doing laundry simultaneously. What a concept!
That was awesome!
A lot of old churches used a similar design for their classical organs, my church still has theirs!
I have that same harmon kardon speaker and i love it. These subs seem amazing. Ill certainly try making one in the future
That is the deepest bass i ever heard, and i think my headphones couldn't even keep up with the base lol
I held off on commenting "what's the point of this, this is dumb." And after reading a few comments I've landed on "i just don't think the juice is worth the squeeze on this one tbh" but you do your thing bro. It's better then going out and finding trouble.
Makes logical sense and Logical boom too. Thanks for showing them in action
These are the new age CB devices. There's so much bandwidth going through the air the range of frequencies that can be used as citizen bands, encrypted or not, is immense compared to previous CB radio technology.
Really nice work brother. Well appreciated 👍
This is fantastic. I’m seeing these more and more, but I still want to whitness this irl
Mom: "NATHAN! If the laundry detergent container falls and splits open again, it's coming out of your allowance!" 😁
This awesome 👍
They need these at clubs and concerts.
Also it seems the blades don’t like to flip back-and-forth and change direction. They’re making some sound that sound similar to tearing paper.
Maybe they need to be stiffer or more aerodynamic angles
That's such a cool concept a fan is able to move a lot more air
Yo great job! This is awesome! I wonder how "Bass I Love You" would sound on this.
Probably the same as on the other woofers
Burger King Bass Lettuce. Last thing you'd want in your Burgerking Bass Lettuce is someone else's bass, but with this, it might be what you get..
I could feel it all the way over here. Awesome
Badass bro first time I’ve seen them actually play content off of them
Jeez those things sound amazing!!!
I am very curious how you coupled the blade actuator to the hub with a 3d print that isn't shattering from the forces there.
Would be a ton of fun to try
funny how you think we peasants will hear ANYTHING this monster does without us having the same equipment lol
That's why I think making videos of this is kinda stupid