Subwoofer like no other?

[iceVee]

Here's a subwoofer technology I haven't seen before.

http://www.eminent-tech.com/main.html

Click on the "TRW-17" image (the one that looks like a fan.)

I just can't figure out where I'd mount it in the car...

[RichB]

I have actually seen one of these things in person. Very ingenuious design. Not surprised though becuase Bruce Thigpen of Eminent Technologies is a very smart dude.

[OnelowcabriO]

ouch!

Rotary Woofer Pricing:


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

pretty cool though

[clubfootedmidget]

I bet I know someone who'd buy that. That's a really impressive piece of equipment.

[iceVee]

I have actually seen one of these things in person. Very ingenuious design. Not surprised though becuase Bruce Thigpen of Eminent Technologies is a very smart dude.

Did you get a chance to listen to it at all? I'm curious because the description of how it works makes sense (air displacement is the key, after all) but I guess I'd like to listen, since I'm curious as to whether it also makes the typical noises you'd associate with a fan.

Having "listened" to a home theater system that was capable of real sound energy below 20 Hz, I've long thought that the 20 Hz cutoff was too high.

The mechanical system for changing blade pitch must have a mighty fast response time...

[RichB]

Did you get a chance to listen to it at all? I'm curious because the description of how it works makes sense (air displacement is the key, after all) but I guess I'd like to listen, since I'm curious as to whether it also makes the typical noises you'd associate with a fan.

Having "listened" to a home theater system that was capable of real sound energy below 20 Hz, I've long thought that the 20 Hz cutoff was too high.

The mechanical system for changing blade pitch must have a mighty fast response time...

This was a display suite/room at CES.... kind of hard to set this up properly in a hotel room, so no I did not hear it.

For music most music reproduction, 35 to 40 Hz is plenty low enough for any sound system. I can see this for use in HT use though (and certain organ music).

[iceVee]

This was a display suite/room at CES.... kind of hard to set this up properly in a hotel room, so no I did not hear it.

For music most music reproduction, 35 to 40 Hz is plenty low enough for any sound system. I can see this for use in HT use though (and certain organ music).

My favorite is listening to the tympani in "Also Sprach Zarathustra". If you've only heard this on a system capable of 35 Hz there is a whole range of notes that aren't even audible. The friend that has the HT system capable of the low stuff spent quite a bit of time with a sound meter and a tone generator to get the system response correct, and discovered its low frequency capabilities essentially by accident. The subwoofers are mounted in the ceiling directly over the viewing surface, and the attic (it's a ranch) functions as the enclosure. Pretty impressive with certain movies.

[RichB]

the tympani in "Also Sprach Zarathustra".

I understand what you are saying but Also Sprach (i.e. 2001 the movie music to most other people), but it is not most music (or typical of even most classical music). The end of that also has some low organ too IIRC.... it can be a beast to reproduce for any system (stereo or multichannel).

The lowest note on a piano is around 40hz, lowest note on a electric bass is 44hz (double basses and tuba scan get down around there too). Most classical music, pop music, rock, music, jazz etc is about 40Hz or higher.

My point being, for music reproduction, I'd rather have a excellent (speaker) system that goes from the low 30's Hz on up than a good system that gets that last octave from 35Hz on down.

I have a excellent old article from the Audio Engineering Society Journal on the Sound of the orchestra.... very interesting reading. If you ever want a read I'll make you a copy.

[WickedWabbit]

Has anyone ever tried to test how long "the never ending note" by The Beatles lasts?