Wednesday, November 30, 2011

The Rotary Woofer

I first read about it more than 20 years ago, the Eminent Technology TRW-17 Rotary Woofer.  Yes, I can't afford it (not planning to open theme park).  Peter Montcrief in the International Audio Review called it the only true subwoofer.

They have a downloadable audio test CD.

They argue that there is no clearly defined low frequency limit to human hearing.  Instead, human hearing simply becomes less sensitive at lower frequencies.  At 5 Hz, it takes an astounding 115dB simply to be audible.  For cone speakers, this is extremely difficult, it takes more and more surface area to reproduce such low frequencies.  Of course, it was exactly what the TRW-17 was designed to do.

(I'm not planning go get one, they're very expensive and require custom installation.)

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