Heres some facts. As the frequency lowers the ear becomes less efficient, being itself like an inverted horn so 20-hz and below is basically inaudible to us. However the rearefaction & pressurization with high volumes @ 1hz-20hz changes the way we perceive the high frequencies. Fan noise is taken care of with a sound trap which is usually one box on the front in the theater and another in the next room or even better, outside. No problem getting 25db at listening position. I want one! nochti.com
You call that cacophony, a little fan noise???......producing infrasound??...good......producing music/Audiophile grade infrasound ???.....HA HA HA HA
I would like to see some hillbilly put this in his trailer and crank it, then post the video on youtube. If he can afford this he probably isn't living in a trailer.
to all those that hate on rotary subs...You have to feel it to appreciate it! Yeah you can have a cone system shake the walls and make things move around, but a rotary sub will smack your body like you were there when the the bomb goes off in a movie!
The subs work by pitching the blades forward and backward to create pressure waves. And the reason that none of you can hear the thing is because it only works below 20Hz which is at the end of human hearing and well below anybody's computer speaker range.
For fucks sake you lame ass. It is not below human hearing at all. And those who think it is are fucking retarded.
At 20Hz and below, the SPL generated by a standard sub-woofer dramatically drops and as such you hear no sound. At 5Hz, around 115db is required for an audible sound, this sounds similar to 30hz at 60db. This machine can create the necessary SPL levels at 10Hz and below that it is fully audible. Hence why people spend $20k on these instead of a standard sub-woofer.
The fan remains at a constant speed, then as a signal is passed to the controller, the blades are pitched to specific angles to create more or less air pressure. This is what your ear picks up as sound. You may notice that large speakers and sub-woofers always note an SPL level. This is a measurement of how much air can be moved at a given frequency.
Whereas a normal cone speaker gives out the sound pressure by combining frequency and air movement in one mechanism, this splits them up. The fan provides the air movement, and the pitch of the blades provides the frequency.
Oh yeah, if you said "you can hear how little fan noise comes along with the tremendous 1-20Hz sound pressure." then why are you running it at 30+ Hz?
Because you can't. Rotary Infrasonic woofers are designed to reproduce 18Hz or less waveforms requiring 1000's of watts of power which music instruments cannot produce. Bombs, tanks, Sci-Fi UFOs and Helicopters do.
Conventional speakers can no longer achieve this at such low frequencies and high energy levels.
It's an experience you will never understand... unless you have a Cat D10 rumble by 80 yards away from your house. XD
If you have a friend with a machine shop you can actually build one yourself pretty cheap. Just need a $80 1HP AC motor and some custom swashplate mechanism hooked to a voice coil to modulate the fan blade pitch.
Heres some facts. As the frequency lowers the ear becomes less efficient, being itself like an inverted horn so 20-hz and below is basically inaudible to us. However the rearefaction & pressurization with high volumes @ 1hz-20hz changes the way we perceive the high frequencies. Fan noise is taken care of with a sound trap which is usually one box on the front in the theater and another in the next room or even better, outside. No problem getting 25db at listening position. I want one! nochti.com
NOCHTIcom 1 year ago
You call that cacophony, a little fan noise???......producing infrasound??...good......producing music/Audiophile grade infrasound ???.....HA HA HA HA
prodigytechus 1 year ago
that is the most bumbest sub i seen fucken fagget ass fan thing
urbanbusta 1 year ago
can it do sine-waves and 808 bassdrums?
vegunited06 1 year ago
I wonder how far Morse Code at 2 hertz for 60 seconds per dot would travel with one of these woofers.
Amishman35 1 year ago
I would like to see some hillbilly put this in his trailer and crank it, then post the video on youtube. If he can afford this he probably isn't living in a trailer.
baronofbefoulment 2 years ago
to all those that hate on rotary subs...You have to feel it to appreciate it! Yeah you can have a cone system shake the walls and make things move around, but a rotary sub will smack your body like you were there when the the bomb goes off in a movie!
Super73VW 2 years ago
The subs work by pitching the blades forward and backward to create pressure waves. And the reason that none of you can hear the thing is because it only works below 20Hz which is at the end of human hearing and well below anybody's computer speaker range.
guitarfreak664 2 years ago
For fucks sake you lame ass. It is not below human hearing at all. And those who think it is are fucking retarded.
At 20Hz and below, the SPL generated by a standard sub-woofer dramatically drops and as such you hear no sound. At 5Hz, around 115db is required for an audible sound, this sounds similar to 30hz at 60db. This machine can create the necessary SPL levels at 10Hz and below that it is fully audible. Hence why people spend $20k on these instead of a standard sub-woofer.
DUMB ASS!!!
snedie69er 2 years ago
piece of trash...
macoy12 3 years ago
i cant hear anything but a noisy fan
is the bass from that so low that my speakers cant play it?
also, where do you buy this thing? can you play normal music with it
sabness69 3 years ago
so it looks like the fan blade is acting as a cone normally would?
stonerj0e 3 years ago
Not in the slightest lol.
The fan remains at a constant speed, then as a signal is passed to the controller, the blades are pitched to specific angles to create more or less air pressure. This is what your ear picks up as sound. You may notice that large speakers and sub-woofers always note an SPL level. This is a measurement of how much air can be moved at a given frequency.
snedie69er 2 years ago
stick your hand in it ;P
jkristheking 3 years ago 8
lol stick you dick in it
ow :(
Bamchucknorris 2 years ago 8
hey tzotzo, do you personally think infrasound has notable psychological effects like some speculate?
otacon451 3 years ago 2
Whereas a normal cone speaker gives out the sound pressure by combining frequency and air movement in one mechanism, this splits them up. The fan provides the air movement, and the pitch of the blades provides the frequency.
ShokaLion 3 years ago 2
i dont get it with these rotary subs i dont get how they work and it looks weird!!!!!!!
sonybloke 4 years ago 2
i dont get how that works?
pete7wiegard 4 years ago
por que no lo ponen a sonar con musica?
xxxmanuelxxx 4 years ago 2
Oh yeah, if you said "you can hear how little fan noise comes along with the tremendous 1-20Hz sound pressure." then why are you running it at 30+ Hz?
westonsagle 4 years ago
is it really that good ?
thepurepwn 4 years ago
That looks like an altivar. I just took an entire course on those frequency drives!
westonsagle 4 years ago
yes, indeed! it is an altivar motor controller... the thing is amazingly tweakable.
tzotzo 4 years ago
I might be the only one here who actually knows what a Cat D10 is...lmfao
SpeakerPolice 4 years ago
a dozer....not a d11 but respectable
pitbullowner77 4 years ago
this pwnz subwoofers..
z7zZz7z 4 years ago
what a big noise o.O
bloom69 4 years ago
put your finger in it
1337h4x0rZ1337 5 years ago
^ lol
madjimms 4 years ago
howcome NOBDY ever actually plays MUSIC on rotary subwoofers?
madjimms 5 years ago
Because you can't. Rotary Infrasonic woofers are designed to reproduce 18Hz or less waveforms requiring 1000's of watts of power which music instruments cannot produce. Bombs, tanks, Sci-Fi UFOs and Helicopters do.
Conventional speakers can no longer achieve this at such low frequencies and high energy levels.
It's an experience you will never understand... unless you have a Cat D10 rumble by 80 yards away from your house. XD
gavincurtis 4 years ago
i always wanted one of these subs but i dont have enough room for one now
EJV900DJ 5 years ago
If you have a friend with a machine shop you can actually build one yourself pretty cheap. Just need a $80 1HP AC motor and some custom swashplate mechanism hooked to a voice coil to modulate the fan blade pitch.
bradform 4 years ago
rotary subwoofers can produce lower frequencys louder because noise travels int he air and the fan takes it further... something like that right?
ThisIsAmbulanceX 5 years ago
lol yep. ermm and this beats an ordinary subwoofer how?
sometube123 5 years ago
the fans is use to rotate the sound waves by pushing a specific wave by also rotating the wings on the motor, able to push lower freqs
EJV900DJ 5 years ago
I don't get it, but it looks cool
relativityboy 5 years ago