this is 1 genius design, nothing can move air back and forth better then a fan with rotary blades, why didn't i think of that? . if they consider a price drop i'd buy it asap hehe
this is 1 genius design, nothing can move air back and forth better then a fan with rotary blades, why didn't i think of that? . if they consider a price drop i'd buy it asap hehe
everyone is stupid. this "subwoofer" is designed to produce notes between 1-10hz. these low frequencies are unheard by the human ear, so all you are GOING TO HEAR is fan noise.
if you increase the RPM's of the rotor won't that increase decibels at higher frequencies? It looks like this system doesn't even use a gear box, the blades are slapped right onto the end of the motor.... I bet with a larger electric motor and a transmission these things could work well at frequencies over 20hz. I'm sure that would require a much beefier assembly though, sheet metal fan blades wouldn't cut it.
This was done before... a company made a rotating subwoofer for car audio back in the early to mid 90's... it was a clear cylinder that was designed to be mounted in a box and it had a rotating fan assembly as well... glad to see the technology coming around again in a nicer package.. I don't think it was 360-degree rotary.. I think it was 180-degree (not sure)... but it worked... it was called the Cyclone by Phoenix Gold
And the fucking point of this shit is ???????????????.......... a fucking fan moving air in an enclosure producing low frequencies .. ???..... not impressed yet .... put it in a vehicle and shake the bolts off of it then i'll be impressed :)... until then its a just a fucking fan
Fuck right it would be ....the person who accomplishes this will be a fucking millionaire overnight .. no exaggeration either ,...!!.. every registered bass head will kill there mother for just one sub ..lol
study Fourier analysis... even a plucked guitar string has frequencies below 20Hz... however, the real question is which studios have not filtered that sub 20Hz out, and then, which receivers/amps don't filter it out. The answer to the latter is, surprisingly... the cheap eqpt doesn't bother to filter low stuff out. Some of the high end stuff tried to add value... but most just let it all fly thru to the speaker. Amps seem to have flat response down to 10Hz.
@IntoxicatedFailures Also... while the music may not go down below 20hz, if the woofer is capable of playing well below that, it means that at least down to 20hz, the output will be flat and not roll off... a lot of speaker systems start rolling off around 30hz which leaves a setup lacking in low bass output..
@IntoxicatedFailures You're clearly a jackass. ANY regular subwoofer is capable of reproducing frequencies in the 20hz-40hz range. The typical speaker design fails miserably at transmitting frequencies below 20hz and therefore don't even bother to (most have a cutoff at 20hz to prevent damaging the speaker).
And lots of recordings have frequencies below 20hz. The sound a helicopters blades make is about 14hz. I bet this would be great for watching movies with explosions.
@IntoxicatedFailures Also, this type of speaker wouldn't work very well in a car to my knowledge. They are designed for home use as they need a large area to act as an infinite baffle.
@Merrick178 Theoretically, it seems like this technology would work in a car. You could have the ultimate infinite baffle by venting the fan (woofer) to the outside. Am I missing something?
If you knew anything about vehicle transfer function and how to properly design a sub enclosure, Im sure you wouldnt have an issue building a good sounding system.
I don't expect you are one who likes to learn for yourself though, but rather have others do for you though based on your narrow minded comments.
For one smart ass i just want to enlighten you that i do know how to properly design a sub enclosure i mean honestly how deep are you willing to test me buddy ,really don't embarrass yourself in trying to show me out REALLY!!,and secondly this video is showing a fucking fan thats it no more no less ... i am sure it is mainly used for home theater systems if that but for car audio this thing at it's present state is useless bottom line ....vehicle transfer function ARE YOU FUCKING SERIOUS LMAO!!
Who said anything about putting it in a vehicle. You'd have to be a real jackass to try that anyway. You're the one who made the idiotic statement: "not impressed yet .... put it in a vehicle and shake the bolts off of it then i'll be impressed :)... until then its a just a fucking fan "
You make idiotic comments when you know nothing about how this operates or performs. As I said, narrow minded...
This is interesting because it shows a different way to do something. Id like to hear one.
There's always one asshole and today it just had to be your nerdy fucking ass !! vehicle transfer function .. My man this isn't rocket science or fucking NASA ,.. it is not that serious or Complicating about building a good sound system so please RELAX WITH YOUR PHYSICS BULLSHIT ,.,...
it's called 'self-noise' from the fan edges, vortexes I guess created by the fan blades. That gets filtered out by the final installation, which puts a large box in between the fan and the room, and inside that box is alot of fiberglass insulation which absorbs almost all of this noise, leaving just a tiny whisper that one can detect in perfect room silence.
Try a stepper motor with a cam to manipulate a diaphram or a linear stepper actuator. Myth Busters did a show attempting to simulate a tesla device known to be a type of earthquake machine using a linear actuator. May be worth looking into.
@tzotzo does that thing works the same way helicopters fans do? i mean, the noise comes by beating the crap out of the air and producing very low frequency notes?
Retards this is NOT for music...or at least the crap music most would like. These are for Movie SFx and for music such as classical to a limited degree. Most music doesn't have any notes low enough for these to bother reproducing. It is all about air displacement!
could you guys actually play some toons so that we can tell what the fuck this thing can actually do? id rather take a sub any day of the week. this thing sucks.
the reason for sound is movements in the air. This is a fan blowing air that is attached to a subwoofer motor, so it is moving forward and backward like a regular sub, but because the fan is blowing the air, it doesn't have to move as far as a regular sub to create a loud low frequency sound.
@Nirvalica no the blades are tilting back and forth as the fan spins around. the fan stays in one place as this happens and doesnt move forward or backward.
does it make all that extra clunking n crap noise all the time? i thought it would cleanly represent sub bass frequencies for the high price tag it has.
He's right for the most part. Generally your amp really dislikes you for putting all that current through half the bridge(Assuming class D), and your speaker starts to heat due to the voltage drop at the resistance given. AKA Don't do it. It would just push the coil in or out, depending on how you have it setup, it could be all the way out, or all the way in, since amps use a bipolar supply last I checked.
So what you are trying to say, djspock, is 0HZ is basically, just electricity running through the coils. Would this just push the cone outwards until something broke, ie fuse or voicecoils fused?
I'm trying to imagine what 0 Hz would mean for conventional cone speaker...its like the cone material would move forward ONCE but it wouldnt come back again... no ?
"I'm trying to imagine what 0 Hz would mean for conventional cone speaker...its like the cone material would move forward ONCE but it wouldnt come back again... no ?"
You can apply 0 Hz but it is exactly like you said. 0 Hz is a DC voltage, which should NEVER be applied to a speaker as it could weld the voice coil to the cone (I have done this to smaller speakers for shits).
Power amplifiers usually cut out at 1 Hz as a 0 Hz signal is like a short circuit to the amp as the speaker has little or no resistance when it is in the high state (the peak of the sine wave). A short circuit will kill your amp without protection (most amps).
Google is your friend. But a short synopsis: Imagine a speaker but instead of the cone you have spinning fan blades.. they spinn flat, when the voice coil engages, it changes the pitch of the blades creating a similar effect to that of helicopter blades to the air. This produces sounds that are too low for a regular coned subwoofer to reproduce accurately. And this device is not a "Sub-woofer", its an actual woofer. I made one back in the 90s, totally worth it.
It could probably get louder if you make the baffle board one inch in thickness so that it does'nt vibrate it and waste its energy output. I wonder if you could put one of these in a vehicle that you would get massive flexing action going on. lol!.
Actually the man behind this is working on that. Seriously. Wouldn't be that hard to modify since the original here is only 17" in diameter, and the blades are controlled by what basically is a speaker motor assembly and only requires a clean 200 watts to work. The problem is that while it can play higher frequencies just fine, it IS a spinning set of blades and has some mechanical noise that would require a large enclosure with a complex filtering system to block those.
This is the only true 'sub'woofer that can produce any significant volume below 20hz. In fact, it can produce sound below <1 hz. It's not meant to be musical, it's meant for reproducing extremely low soundwaves at volume, like that produced by an explosion or wind. Fucking amazing if you ask me.
LOL, please my friend, your JL is geared to CAR audio, this is HOME/THEATER application. Second thing, let's see your precious JL play a constant 1 hz tone that can seriously flex 3 motel rooms (damaged 2 walls) and move doors...on 200 true watts :) I'm not attacking you, just your misplaced comment. I'm also not knocking JL, they are a decent mid-level car subwoofer... and I'm sure you would take it over this $12,000 dollar piece of equipment.
You're right, we should call it what it is, a INFRAsonic wave generator. Plus at the hotel Marriot here in Denver a few years back they held a convention in which the "fan" was placed, it plays 20 hz and slightly higher no problem. Funny thing is that this was designed to be used as an extension for where subwoofers start to fail. Typical SUBwoofers can not accurately reproduce INFRAsonic sounds. Most subs CAN play a 1 hert cycle, but not audibly or felt, this can.
The transducer speed isn't as fast as a traditional subwoofer, so transient responce isn't all that accurate. It may be more efficient but hardly more musical, maybe supplemental is the word here. Technically speaking this is a subsonicwoofer (subsonic tranducer), rumble machine... :)
Like I want to watch movie with that in my apartment :P
j/k this innovative creation is great! I hope you guys get corpulently rich off it. seriously, Im an audio enthusiast/entrepreneur myself and can see this going somewhere with the proper marketing and management team...
not necessarily true... we did some tests that suggest you can 'hear' down to 8Hz or so... there's not a tonality at that point, but you can still 'hear' it with your ear.
I have heard some subwoofers in the distance when I'm out and I've heard some go down to about 20 Hz (I guess), and it feels more like my eardrum flexing than sounding like 20 Hz.
yeah, a that point you are hearing the effects of the low freaquency sounds rather than the sound itself. you are possibly also feeling them throughout yout body as well.
Funny thing is I just got back from the Halloween school dance, and they had the Mackie SWA1501 subwoofer (15" sub, maxed out), and the bass was LOUD! You can easily feel it, and it must have been around 120 or 125 DB's. It was great!
@slammah2012 True, but cat purring isn't a pure 20hz tone. It has harmonics to it that makes it so even 90 year old people can hear it. That's what you're hearing.
@ShokaLion true.. that only applies to a sine and triangle wave as a pure fundemental...... you can hear a saw wave pulse and squarewave easily at 20 hz.... the harmonic content allow you to hear the individual 20 cycles per second.
a fan moves air. so does a cone subwoofer. This highly specialized fan creates pressure waves in exact accordance with the low frequency signal. It does this by changing pitch, somewhat like a helicopter blade, except this pitch can go from negative to zero to positive and back and forth very quickly. It's an amazing simple yet robust design. Very hard to copy without actually getting one and cloning it down to the mm.
yes, this sub can go to DC :) it's called fan blowing air across your face... seriously. SO it can easily handle 0-1Hz as easily as 1-10Hz. The fan couples with the mass of air far more efficiently than does a cone at these low speeds of air pressure oscillation.
doesnt each fin on the fan change direction, so that the air is being pushed then sucked backwards and forwards very very fast, like a normal subwoofer?
yeah, but would it 'work'? the device seems simple in principle, but so does a helicopter. THis thing is not easy to build so that you result in clean low distortion output. It took alot of different blade, motor and mechanical iterations.
are u using the same camera in this one as the first vid coz this one sounds like shit but the first vid has nice deep bass in it and doesn't sound like a plastic bag in a car window??
that price does not include the very fine Lake Contour EQ you will need to crossover your other subs. WHich adds another $3-4k. It's not cheap because volumes are low, there is a tremendous R&D cost to recoup, and the inventor usually needs to consult on the design, and attend/install the actual unit installation.
For when you really want a true subwoofer system. No home theatre is complete without one.
I do have a question. Where does one find any musical content below, say 8 hz. On the Telarc CD recording of Tchaikovsky's 1812 overture (at the finale), the cannons fire. The initial crack of the cannons (authentic 18th century canons) is between 2 to 3 kilohertz followed by a down sweep in frequency to about 8 hertz, now that's music
snake, this is a topic much covered in the avsforums discussion group on the TRW.
Regarding music specifically, turns out that any transient sound, the pluck of a string or hit of a piano, has subharmonics down to near DC. Simple Fourier analysis. So having the TRW hooked up for 2 channel music surprises listeners with a noticeable increase in 'live' quality, depending, of course, on the quality of the recording itself.
cerwin vega was used for the 1974 disaster film "Earthquake" Sensurround involved the installation of up to ten large Cerwin-Vega subwoofer speakers in black-painted wood cabinets, which were placed beneath the screen and in the corners of the theatre.Powered by a 1,600 watt audio amplifier. When triggered by control tones on the film's optical soundtrack, the system generated an almost sub-audible rumble between 5 and 40 Hertz at sound pressures of 110-120 decibels.
possibly, but one TRW and a 200W amplifier can get 0-20Hz up to 125dB flat across the board, something I suspect your CerwinVega example was no where close.
Also, we must specify the size of the room ... to pressure a large theatre vs a small home media room are two different jobs...
"200W amplifier can get 0-20Hz up to 125dB flat" according to there website "Maximum acoustic output >110dB between 0 and 30Hz", "Frequency response 1Hz -- 30Hz +/- 4dB".
btw, the max acoustic output is quite conservative. The inventor/builder is a very humble guy and undersells and overdelivers more than anyone in the high tech field.
Actually snakefootak, cone "sub" woofers can produce wads of air-noise too - especially if your using a reflex enclosure (port-chuffing). Besides, reflex systems have pretty hopeless overall phase response.
The TRW, on the other hand, I think is (correct me if I'm wrong tzotzo) an infinite-baffle setup. Phase response is, at least, smoother, rather than lumpy.
Air noise can be almost eliminated by mounting the TRW the way the makers recommend (they're the experts!)
There is a bit of LF getting through - did you use the mic on the camera, or was it a good external mic (e.g., a measurement mic)? Maybe it's second harmonic distortion in the preamp, but it proves that thing REALLY shifts the air - top marks!!
The microphone on the Nintendo DS Lite makes a handy door-slamming detector. I ran a homebrew oscilloscope on it and took it to my local convenience store. I put the DS in the far end away from the walk-in cooler, then ran the video camera while the scope was drawing. Then I took the walk-in cooler door and wiggled it open and closed without making an audible sound. The whole scope trace moved up and down. If I can find the video, I'll upload it.
No physical cone speaker or microphone can reproduce what this "speaker" does. The volume of the house is literally the resonant chamber of the woofer.
This machine is reproducing wavelengths in the 1 Hz to 20 Hz range at 110+ SPL. Cone speakers are very inefficient and fail at such energy levels.
Understand this machine is for 1-20Hz. Cone subwoofers continue up from there.
lol loving all the dumb comments from people with no logic. things like 'sounds like a plastic bag in a car windows doing 70mph' and you think that from listening to this rotary subwoofer on your tiny PC speakers?
My tiny pc speaker is a cerwin vega 600 watt subwoofer which sounds good on all my bass cd's and rap, metal, classical. This still like sounds like a plastic bag in a car window.
yes, it does sound like that on your subwoofer. However, your subwoofer doesn't go below 30Hz most likely. Also, there is alot of fan noise, motor bearing noise that gets filtered out by what you don't see, which is the manifold on the other side of the fan. So from inside the home theatre, you just get the 0-20Hz frequencies.
i dont hear shit but a crappy fan.
MiniBomberOfficial 3 months ago
Oh, youtube comments...
Never change!
PatientBomb 3 months ago
And 25,000 $!!!!!! Shit...
TheManigliamuscolosa 3 months ago
Straight up AOTS.
saw141 5 months ago
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this is 1 genius design, nothing can move air back and forth better then a fan with rotary blades, why didn't i think of that? . if they consider a price drop i'd buy it asap hehe
plaske12 5 months ago
this is 1 genius design, nothing can move air back and forth better then a fan with rotary blades, why didn't i think of that? . if they consider a price drop i'd buy it asap hehe
plaske12 5 months ago
everyone is stupid. this "subwoofer" is designed to produce notes between 1-10hz. these low frequencies are unheard by the human ear, so all you are GOING TO HEAR is fan noise.
18abVFL 6 months ago
@18abVFL Your stupid. This sub was NOT designed for you to hear the notes, it was built to feel it. and it's 0-20hz.
GT5Enthusiast 5 months ago
@GT5Enthusiast how am i stupid, thats almost exactly what I said faggot.
18abVFL 5 months ago
@18abVFL That was not even remotely close to what you said. Maybe in your little brain, but to the average person it made no sense.
GT5Enthusiast 5 months ago
you can't hear a thing only air
jk1567 7 months ago
i hear.........a fan
BrUt4LSm4cKDoWn 7 months ago
Man, I'm really curious to what this sounds like with some music.
dana44s 7 months ago
I dont see any advantage to make it rotary
deaftodd 7 months ago
I love this song!
graytico 11 months ago 5
SUB SONIC BASS IS FELT NOT HEARD THATS HOW IT WORKS
IMACULATESHOTZ 1 year ago
idk how the fuck it works ,but its still sick
CClocals 1 year ago
@CClocals It's a fan attached to a woofer. Quite simple... It works on the principle of alternating the fan's air to produce a big amount of bass
MrEinstain 1 year ago
why do u need such low frequency.... you can't hear below 20hz
wow1022 1 year ago
@wow1022 You FEEL below 20Hz. Ever been near a large explosion? Or a jet?
dc12volthippy 1 year ago
could this finally be the unit that will reproduce the "brown" note ?? hahaha awesome
theprscustomartist24 1 year ago 14
if you increase the RPM's of the rotor won't that increase decibels at higher frequencies? It looks like this system doesn't even use a gear box, the blades are slapped right onto the end of the motor.... I bet with a larger electric motor and a transmission these things could work well at frequencies over 20hz. I'm sure that would require a much beefier assembly though, sheet metal fan blades wouldn't cut it.
nukem419 1 year ago
@nukem419 Or you could just, idk, get a normal subwoofer for frequencies over 20hz instead of worrying about hooking a transmission to a fan. Moron.
Merrick178 9 months ago
@Merrick178 Why bother with comments like this. Seriously? What's wrong with a little experimentation? Probably pretty good for movies imho.
cs01ab 9 months ago
This was done before... a company made a rotating subwoofer for car audio back in the early to mid 90's... it was a clear cylinder that was designed to be mounted in a box and it had a rotating fan assembly as well... glad to see the technology coming around again in a nicer package.. I don't think it was 360-degree rotary.. I think it was 180-degree (not sure)... but it worked... it was called the Cyclone by Phoenix Gold
akura2 1 year ago
So what's this sub like when watching movies with helicopters and explosions? Is it that different from, say, a THX certified movie theater?
A550RGY 1 year ago
did'nt get it . ..
gottuntersterblichen 1 year ago
BTW, anybody commenting that you can't hear below 20hz, only feel . . . that's the whole f*cking idea dumbass.
As mentioned numerous times, it's not for music. Sure, some music will have low enough bass for it, but it's probably not intended to be heard.
This is for watching movies with realism. If you're watching a movie with earthquake, then you will feel the earthquake.
Seriously, use google, type in "rotary woofer" and educate yourself.
theJesusYHSWH 1 year ago
WTF, why are people even discussing using a rotary woofer in a car? Does anybody who suggested that even understand how one of these works?
It needs a VERY LARGE SPACE behind it, hence why it's installed between the listening room and another room.
Honestly, what are you going to do? Put it in the lid of your trunk and try to rattle your car to pieces?
theJesusYHSWH 1 year ago
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Are you all forgetting that Bass Below 20Hz is almost unhearable?
sure you can fell it......and shake your mortor and foundation apart............... GET some TNT that will do a better job
Bet the SQ is like bad diarrhea in a public bathroom
smokeymasterjedi 2 years ago
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Cats have little hooks all over their tongues
mesamesa1 2 years ago
And the fucking point of this shit is ???????????????.......... a fucking fan moving air in an enclosure producing low frequencies .. ???..... not impressed yet .... put it in a vehicle and shake the bolts off of it then i'll be impressed :)... until then its a just a fucking fan
raygunz45 2 years ago
@raygunz45
its really for movie theaters that are gonna start to use em for more feeling in your movies. But a car sub of this, would be incredible.
IntoxicatedFailures 2 years ago
Fuck right it would be ....the person who accomplishes this will be a fucking millionaire overnight .. no exaggeration either ,...!!.. every registered bass head will kill there mother for just one sub ..lol
raygunz45 2 years ago
only problem is, what songs do you listen to have freuquencies worth listening to that go below 20hz?
They need to make these for cars to be in the 20-40 hz range.
IntoxicatedFailures 2 years ago
study Fourier analysis... even a plucked guitar string has frequencies below 20Hz... however, the real question is which studios have not filtered that sub 20Hz out, and then, which receivers/amps don't filter it out. The answer to the latter is, surprisingly... the cheap eqpt doesn't bother to filter low stuff out. Some of the high end stuff tried to add value... but most just let it all fly thru to the speaker. Amps seem to have flat response down to 10Hz.
tzotzo 2 years ago
@tzotzo
my point is, what is there to listen to below 15 hz, you cant hear it, only feel it. Theres no point to it for a car to have.
IntoxicatedFailures 2 years ago
@IntoxicatedFailures Also... while the music may not go down below 20hz, if the woofer is capable of playing well below that, it means that at least down to 20hz, the output will be flat and not roll off... a lot of speaker systems start rolling off around 30hz which leaves a setup lacking in low bass output..
akura2 1 year ago
@IntoxicatedFailures bass i love you
EASTYJAZ34 1 year ago
@IntoxicatedFailures You're clearly a jackass. ANY regular subwoofer is capable of reproducing frequencies in the 20hz-40hz range. The typical speaker design fails miserably at transmitting frequencies below 20hz and therefore don't even bother to (most have a cutoff at 20hz to prevent damaging the speaker).
And lots of recordings have frequencies below 20hz. The sound a helicopters blades make is about 14hz. I bet this would be great for watching movies with explosions.
Merrick178 1 year ago
@IntoxicatedFailures Also, this type of speaker wouldn't work very well in a car to my knowledge. They are designed for home use as they need a large area to act as an infinite baffle.
Merrick178 1 year ago
@Merrick178 Theoretically, it seems like this technology would work in a car. You could have the ultimate infinite baffle by venting the fan (woofer) to the outside. Am I missing something?
bjorn2run 1 year ago
@raygunz45
If you knew anything about vehicle transfer function and how to properly design a sub enclosure, Im sure you wouldnt have an issue building a good sounding system.
I don't expect you are one who likes to learn for yourself though, but rather have others do for you though based on your narrow minded comments.
captainobvious9999 2 years ago
For one smart ass i just want to enlighten you that i do know how to properly design a sub enclosure i mean honestly how deep are you willing to test me buddy ,really don't embarrass yourself in trying to show me out REALLY!!,and secondly this video is showing a fucking fan thats it no more no less ... i am sure it is mainly used for home theater systems if that but for car audio this thing at it's present state is useless bottom line ....vehicle transfer function ARE YOU FUCKING SERIOUS LMAO!!
raygunz45 2 years ago
Who said anything about putting it in a vehicle. You'd have to be a real jackass to try that anyway. You're the one who made the idiotic statement: "not impressed yet .... put it in a vehicle and shake the bolts off of it then i'll be impressed :)... until then its a just a fucking fan "
You make idiotic comments when you know nothing about how this operates or performs. As I said, narrow minded...
This is interesting because it shows a different way to do something. Id like to hear one.
captainobvious9999 2 years ago
There's always one asshole and today it just had to be your nerdy fucking ass !! vehicle transfer function .. My man this isn't rocket science or fucking NASA ,.. it is not that serious or Complicating about building a good sound system so please RELAX WITH YOUR PHYSICS BULLSHIT ,.,...
raygunz45 2 years ago
whats that very high frequency noise?!
carlnathan 2 years ago 3
it's called 'self-noise' from the fan edges, vortexes I guess created by the fan blades. That gets filtered out by the final installation, which puts a large box in between the fan and the room, and inside that box is alot of fiberglass insulation which absorbs almost all of this noise, leaving just a tiny whisper that one can detect in perfect room silence.
tzotzo 2 years ago 8
@tzotzo how about using a brush less motor? those are fairly quiet.
fronteraroja001 1 year ago
@tzotzo i know that its a bad idea, but can you build one for car audio purposes?
Draco1180 1 year ago
@carlnathan More possibly noise from the motor itself. Sounds like a fairly strong electric motor.
obeyance 1 year ago
Try a stepper motor with a cam to manipulate a diaphram or a linear stepper actuator. Myth Busters did a show attempting to simulate a tesla device known to be a type of earthquake machine using a linear actuator. May be worth looking into.
PhysicsGuerrilla 2 years ago
so is this turning clockwise and counterclockwise very rapidly?
MTLkayaker 2 years ago
no, it always spins the same direction.
the variable pitch blades are responsible for the frequency changes.
cichlidkeeper89 2 years ago
correct, you got it cichlid.
tzotzo 2 years ago
@tzotzo does that thing works the same way helicopters fans do? i mean, the noise comes by beating the crap out of the air and producing very low frequency notes?
fronteraroja001 2 years ago
The pipes of some organs produce ~16Hz tones, and, of course, any oscillator would. It would be nice to build one of these.
IgorSavtchenko 2 years ago
my ceiling fan is making a ton of bass right now! I always wondered what that was,now i know.
s0uthp4w68 2 years ago
Retards this is NOT for music...or at least the crap music most would like. These are for Movie SFx and for music such as classical to a limited degree. Most music doesn't have any notes low enough for these to bother reproducing. It is all about air displacement!
Super73VW 2 years ago
could you guys actually play some toons so that we can tell what the fuck this thing can actually do? id rather take a sub any day of the week. this thing sucks.
sneitz001 2 years ago
Fan with noise
MaxextremeMs 2 years ago
play some music not popcorn noise
Activethrasher00 2 years ago 2
i dont wanna sound dumb.. but r u calling this a subwoofer? or is the fan acting with a sub to create a low fq.. please answer soo lost
dougie730 2 years ago
it's a sub woofer spining on a motor
bait28 2 years ago
Pffahahaahaha.
AaronWallace 2 years ago
the reason for sound is movements in the air. This is a fan blowing air that is attached to a subwoofer motor, so it is moving forward and backward like a regular sub, but because the fan is blowing the air, it doesn't have to move as far as a regular sub to create a loud low frequency sound.
Nirvalica 2 years ago
ohh ok totally awsome
dougie730 2 years ago
@Nirvalica no the blades are tilting back and forth as the fan spins around. the fan stays in one place as this happens and doesnt move forward or backward.
bassl0va 2 years ago
Yea, I was wrong. I wonder if it could work the way I described too...
Nirvalica 2 years ago
it probably would, but maybe not as well. glue a fan to a sub and see! : )
bassl0va 2 years ago
Haha, yea, I was thinking about it.
Nirvalica 2 years ago
the fan has movable blades to that it can be a subwoofer that can displace huge amounts of air
pokerface3699 2 years ago
Good mic in your camera and nice 13-25hz bass.
yrpajaillu 2 years ago
why dont you make a vid of it playing music
Wtorres996 2 years ago
sounds like ur makin popcorn
sprijic2 2 years ago
is das ein scheiß das ding taugt null
duesseldorfer123 2 years ago 2
auuuuuuuuuuuuuuuuuuuuuuuuuuuuuuhhhhhh this suckkkkkkkkksssss
JamesRB1995 2 years ago
what...is it?
firefightjason 2 years ago
INSIDE OF A DRYER? LOL
bassline786 2 years ago
does it make all that extra clunking n crap noise all the time? i thought it would cleanly represent sub bass frequencies for the high price tag it has.
prankmypants 3 years ago
He's right for the most part. Generally your amp really dislikes you for putting all that current through half the bridge(Assuming class D), and your speaker starts to heat due to the voltage drop at the resistance given. AKA Don't do it. It would just push the coil in or out, depending on how you have it setup, it could be all the way out, or all the way in, since amps use a bipolar supply last I checked.
Just don't do it. xD
TeslaWasHere 3 years ago
So what you are trying to say, djspock, is 0HZ is basically, just electricity running through the coils. Would this just push the cone outwards until something broke, ie fuse or voicecoils fused?
xPr1m3 3 years ago
wtf?
kingadaboom 3 years ago
wow! I wonder what happens when you hit your wall's resonnance frequency...
korram 3 years ago
Ha!!! Hilarious!
mikeyanimations 3 years ago
i wonder how these sub-20Hz freqs sound..
h4x0y 3 years ago
ask a whale, because they're the only ones who can hear it.
mortson978 3 years ago
but u can feel it
h4x0y 3 years ago 2
How is it that can it handle 0 Hz ?
I know that a shockwave has 0 Hz .
I'm trying to imagine what 0 Hz would mean for conventional cone speaker...its like the cone material would move forward ONCE but it wouldnt come back again... no ?
NikuCN 3 years ago
"I'm trying to imagine what 0 Hz would mean for conventional cone speaker...its like the cone material would move forward ONCE but it wouldnt come back again... no ?"
I don't even think that it would move :S
Smekarn0 3 years ago
nup, i dont think it moves till around 10hz, and then from there it doesnt actually play a proper note until 20hz or more
simonmitchellbird 3 years ago
You can apply 0 Hz but it is exactly like you said. 0 Hz is a DC voltage, which should NEVER be applied to a speaker as it could weld the voice coil to the cone (I have done this to smaller speakers for shits).
Power amplifiers usually cut out at 1 Hz as a 0 Hz signal is like a short circuit to the amp as the speaker has little or no resistance when it is in the high state (the peak of the sine wave). A short circuit will kill your amp without protection (most amps).
djspock 3 years ago
wouldn't 0 Hz be impossible because how can you have zero waves per second... it just doesn't make any sense its like trying to divide by zero
poopyhead280 3 years ago
Obviously you did not read what I wrote...
0Hz = Direct Current.
It is still a voltage with different properties than AC (Alernating current) which is required to make sound.
djspock 3 years ago
ah i see that makes sense
poopyhead280 3 years ago
lol poopyhead
firefightjason 2 years ago
I Dont see how it works or how it can be a subwoofer?
pwND001 3 years ago
Google is your friend. But a short synopsis: Imagine a speaker but instead of the cone you have spinning fan blades.. they spinn flat, when the voice coil engages, it changes the pitch of the blades creating a similar effect to that of helicopter blades to the air. This produces sounds that are too low for a regular coned subwoofer to reproduce accurately. And this device is not a "Sub-woofer", its an actual woofer. I made one back in the 90s, totally worth it.
..X..
Xonegod 3 years ago
THanks.. Lol... Google is your freind...
pwND001 3 years ago
this is one of those things "you have to be there" there is NO way the camera mic can pick that up....
VideyoJunkei 3 years ago
most 'Bass booms' in Rap songs from the 90's was about 40 Hertz. (Perhaps because tape decks can't 'go low' too well)
VideyoJunkei 3 years ago
It could probably get louder if you make the baffle board one inch in thickness so that it does'nt vibrate it and waste its energy output. I wonder if you could put one of these in a vehicle that you would get massive flexing action going on. lol!.
thetechnician22 3 years ago
Actually the man behind this is working on that. Seriously. Wouldn't be that hard to modify since the original here is only 17" in diameter, and the blades are controlled by what basically is a speaker motor assembly and only requires a clean 200 watts to work. The problem is that while it can play higher frequencies just fine, it IS a spinning set of blades and has some mechanical noise that would require a large enclosure with a complex filtering system to block those.
Speedcult77 3 years ago
This is the only true 'sub'woofer that can produce any significant volume below 20hz. In fact, it can produce sound below <1 hz. It's not meant to be musical, it's meant for reproducing extremely low soundwaves at volume, like that produced by an explosion or wind. Fucking amazing if you ask me.
maxtroy 3 years ago 17
@maxtroy too bad you can't hear below 20hz.
deathprince 1 year ago
wtf is that ment to be does it sound any good?
kawwasaki 3 years ago
This comment has received too many negative votes show
i dont care what anybody says, ill take my jl audio 13.5 W7 over this fucking fan anyday
jrfarve 3 years ago
yea right
bassplayer2525 3 years ago
LOL, please my friend, your JL is geared to CAR audio, this is HOME/THEATER application. Second thing, let's see your precious JL play a constant 1 hz tone that can seriously flex 3 motel rooms (damaged 2 walls) and move doors...on 200 true watts :) I'm not attacking you, just your misplaced comment. I'm also not knocking JL, they are a decent mid-level car subwoofer... and I'm sure you would take it over this $12,000 dollar piece of equipment.
Speedcult77 3 years ago
I have no idea why you people call this a subwoofer. This is more like a rumble machine. It would be good for concerts
MATTx602 3 years ago
You're right, we should call it what it is, a INFRAsonic wave generator. Plus at the hotel Marriot here in Denver a few years back they held a convention in which the "fan" was placed, it plays 20 hz and slightly higher no problem. Funny thing is that this was designed to be used as an extension for where subwoofers start to fail. Typical SUBwoofers can not accurately reproduce INFRAsonic sounds. Most subs CAN play a 1 hert cycle, but not audibly or felt, this can.
Speedcult77 3 years ago
the fan's noise is so loud, you will no longer hear the fucking infrasound
moester101 3 years ago 3
The transducer speed isn't as fast as a traditional subwoofer, so transient responce isn't all that accurate. It may be more efficient but hardly more musical, maybe supplemental is the word here. Technically speaking this is a subsonicwoofer (subsonic tranducer), rumble machine... :)
PinchePolloLoco 3 years ago
Hey PinchePolloLoco, guess you're a 'cuate', adivino bien ? saludos desde BuenosAires4u. Chau.
buenosaires4u 3 years ago
Like I want to watch movie with that in my apartment :P
j/k this innovative creation is great! I hope you guys get corpulently rich off it. seriously, Im an audio enthusiast/entrepreneur myself and can see this going somewhere with the proper marketing and management team...
jando86 3 years ago
haha gues you dont have to worry about blowing it then huh?
nofearX18 4 years ago
how does the Hz scale work? what is the highest and lowest possible Hz?
pete7wiegard 4 years ago
the highest a human can hear at birth is 21khz and the lowest anyone can hear is 15hz past that you dont hear it, you FEEL it
speeddemon1092 3 years ago 11
not necessarily true... we did some tests that suggest you can 'hear' down to 8Hz or so... there's not a tonality at that point, but you can still 'hear' it with your ear.
tzotzo 3 years ago
I have heard some subwoofers in the distance when I'm out and I've heard some go down to about 20 Hz (I guess), and it feels more like my eardrum flexing than sounding like 20 Hz.
31Orcas 3 years ago
yeah, a that point you are hearing the effects of the low freaquency sounds rather than the sound itself. you are possibly also feeling them throughout yout body as well.
alphamone 3 years ago
Funny thing is I just got back from the Halloween school dance, and they had the Mackie SWA1501 subwoofer (15" sub, maxed out), and the bass was LOUD! You can easily feel it, and it must have been around 120 or 125 DB's. It was great!
31Orcas 3 years ago
I made a vid of the Mackie sub at the dance. Please watch it and my other videos please!
31Orcas 3 years ago
@speeddemon1092 the strange part is the i can hear 1hz :/ is that normal?
Pure2Trance 1 year ago
@speeddemon1092 ...
cats purr at 20 hz....thats easy to hear.... 10 hz is one octave down....
my yamaha cs80 can generate oscillations way below 1 hz.... my guess is below .25 hz or 4 seconds per cycle...
slammah2012 1 year ago
@slammah2012 True, but cat purring isn't a pure 20hz tone. It has harmonics to it that makes it so even 90 year old people can hear it. That's what you're hearing.
ShokaLion 1 year ago
@ShokaLion true.. that only applies to a sine and triangle wave as a pure fundemental...... you can hear a saw wave pulse and squarewave easily at 20 hz.... the harmonic content allow you to hear the individual 20 cycles per second.
slammah2012 1 year ago
@ShokaLion and yes, triangle isnt pure but is still inaudible at 20
slammah2012 1 year ago
how is it possible for spinning blades to create a subwoofer? i just dont get it.
pete7wiegard 4 years ago
a fan moves air. so does a cone subwoofer. This highly specialized fan creates pressure waves in exact accordance with the low frequency signal. It does this by changing pitch, somewhat like a helicopter blade, except this pitch can go from negative to zero to positive and back and forth very quickly. It's an amazing simple yet robust design. Very hard to copy without actually getting one and cloning it down to the mm.
tzotzo 4 years ago
is it possible for a sub to go any lower than 1Hz? if so, how much?
pete7wiegard 4 years ago
yes, this sub can go to DC :) it's called fan blowing air across your face... seriously. SO it can easily handle 0-1Hz as easily as 1-10Hz. The fan couples with the mass of air far more efficiently than does a cone at these low speeds of air pressure oscillation.
tzotzo 4 years ago
yes but cant hear it just feel it... you might hear the sound reverberating off walls or windows. when they vibrate they make there own pitch.
Spencer2302 4 years ago
doesnt each fin on the fan change direction, so that the air is being pushed then sucked backwards and forwards very very fast, like a normal subwoofer?
barevids 4 years ago
I'd love to hear a rotary sub in action!
CruzDemon 4 years ago
i make this rotarywoofer by 3000us$. "made in argentine by me"
darrayd 4 years ago
yeah, but would it 'work'? the device seems simple in principle, but so does a helicopter. THis thing is not easy to build so that you result in clean low distortion output. It took alot of different blade, motor and mechanical iterations.
tzotzo 4 years ago
are u using the same camera in this one as the first vid coz this one sounds like shit but the first vid has nice deep bass in it and doesn't sound like a plastic bag in a car window??
bouncingbetty1 4 years ago
not sure which cam we used for this video, but the main video was taken with a very high end studio grade HD cam.
tzotzo 4 years ago
Found it:
TRW-17 transducer $12,900.00
Motor Controller $350.00
Amplifier and crossover $700.00
Design and installation, typical $8,000-$12,000*
Total $21,950-$25,950
snakefootak 4 years ago
that price does not include the very fine Lake Contour EQ you will need to crossover your other subs. WHich adds another $3-4k. It's not cheap because volumes are low, there is a tremendous R&D cost to recoup, and the inventor usually needs to consult on the design, and attend/install the actual unit installation.
For when you really want a true subwoofer system. No home theatre is complete without one.
tzotzo 4 years ago
Price very well may be this things downfall. . .
snakefootak 4 years ago
And just how much does this cost? price please.
snakefootak 4 years ago
what's the MSRP
snakefootak 4 years ago
I do have a question. Where does one find any musical content below, say 8 hz. On the Telarc CD recording of Tchaikovsky's 1812 overture (at the finale), the cannons fire. The initial crack of the cannons (authentic 18th century canons) is between 2 to 3 kilohertz followed by a down sweep in frequency to about 8 hertz, now that's music
snakefootak 4 years ago
snake, this is a topic much covered in the avsforums discussion group on the TRW.
Regarding music specifically, turns out that any transient sound, the pluck of a string or hit of a piano, has subharmonics down to near DC. Simple Fourier analysis. So having the TRW hooked up for 2 channel music surprises listeners with a noticeable increase in 'live' quality, depending, of course, on the quality of the recording itself.
tzotzo 4 years ago
cerwin vega was used for the 1974 disaster film "Earthquake" Sensurround involved the installation of up to ten large Cerwin-Vega subwoofer speakers in black-painted wood cabinets, which were placed beneath the screen and in the corners of the theatre.Powered by a 1,600 watt audio amplifier. When triggered by control tones on the film's optical soundtrack, the system generated an almost sub-audible rumble between 5 and 40 Hertz at sound pressures of 110-120 decibels.
snakefootak 4 years ago
possibly, but one TRW and a 200W amplifier can get 0-20Hz up to 125dB flat across the board, something I suspect your CerwinVega example was no where close.
Also, we must specify the size of the room ... to pressure a large theatre vs a small home media room are two different jobs...
tzotzo 4 years ago
according to there website it's: Frequency response 1Hz -- 30Hz +/- 4dB
I would never call +/- 4db , flat.
snakefootak 4 years ago
"200W amplifier can get 0-20Hz up to 125dB flat" according to there website "Maximum acoustic output >110dB between 0 and 30Hz", "Frequency response 1Hz -- 30Hz +/- 4dB".
snakefootak 4 years ago
btw, the max acoustic output is quite conservative. The inventor/builder is a very humble guy and undersells and overdelivers more than anyone in the high tech field.
tzotzo 4 years ago
can i just ask you how the fuck did you afford a rotary subwoofer lol
vinny460 4 years ago
Actually snakefootak, cone "sub" woofers can produce wads of air-noise too - especially if your using a reflex enclosure (port-chuffing). Besides, reflex systems have pretty hopeless overall phase response.
The TRW, on the other hand, I think is (correct me if I'm wrong tzotzo) an infinite-baffle setup. Phase response is, at least, smoother, rather than lumpy.
Air noise can be almost eliminated by mounting the TRW the way the makers recommend (they're the experts!)
mckdees 4 years ago
There is a bit of LF getting through - did you use the mic on the camera, or was it a good external mic (e.g., a measurement mic)? Maybe it's second harmonic distortion in the preamp, but it proves that thing REALLY shifts the air - top marks!!
mckdees 4 years ago
we recorded this using the built in mic on the camcorder... turns out alot of cheap mics actually do a good job of LF recording.
tzotzo 4 years ago
The microphone on the Nintendo DS Lite makes a handy door-slamming detector. I ran a homebrew oscilloscope on it and took it to my local convenience store. I put the DS in the far end away from the walk-in cooler, then ran the video camera while the scope was drawing. Then I took the walk-in cooler door and wiggled it open and closed without making an audible sound. The whole scope trace moved up and down. If I can find the video, I'll upload it.
Amishman35 3 years ago
No physical cone speaker or microphone can reproduce what this "speaker" does. The volume of the house is literally the resonant chamber of the woofer.
This machine is reproducing wavelengths in the 1 Hz to 20 Hz range at 110+ SPL. Cone speakers are very inefficient and fail at such energy levels.
Understand this machine is for 1-20Hz. Cone subwoofers continue up from there.
gavincurtis 4 years ago
Yes, but, the high frequency noise is unacceptable.
snakefootak 4 years ago
huh?
xXxmidgexXx 5 years ago
lol loving all the dumb comments from people with no logic. things like 'sounds like a plastic bag in a car windows doing 70mph' and you think that from listening to this rotary subwoofer on your tiny PC speakers?
vegunited06 5 years ago
My tiny pc speaker is a cerwin vega 600 watt subwoofer which sounds good on all my bass cd's and rap, metal, classical. This still like sounds like a plastic bag in a car window.
snakefootak 4 years ago
yes, it does sound like that on your subwoofer. However, your subwoofer doesn't go below 30Hz most likely. Also, there is alot of fan noise, motor bearing noise that gets filtered out by what you don't see, which is the manifold on the other side of the fan. So from inside the home theatre, you just get the 0-20Hz frequencies.
tzotzo 4 years ago
hook it up to some bass songs and prove it can actually play music
thuger91 5 years ago
it sounds like a noise from open window in high-speed train. I can hear some scaring sound when I watching this movie. It's cool devise.
1u2ra3gan 5 years ago
That's the whole idea. I believe it does 1hz - 30hz at atleast 160dB. Google it. Thigpen Rotary Woofer. They cost 20k.
spezzy 5 years ago
Can it be made to perform like a real subwoofer and actually do bass in movies and normal songs?
willhub 5 years ago
sort of... an open car window does make lots of very low freq noise. These demo's were of random low freq noise.
tzotzo 5 years ago
sounds like a plastic bag in a car windows doing 70mph
anythingoriginal 5 years ago
how do u make one of them, i want one lol
devvo2oo6 5 years ago