Eminent Technology Thigpen Rotary Woofer TRW-17

Eminent Technology Thigpen Rotary Woofer TRW-17 Eminent Technology Thigpen Rotary Woofer TRW-17

Item: 3596

** This product is no longer available **

The Thigpen Rotary Woofer is the worlds first true infrasonic home audio or home theater woofer. Conventional subwoofers roll off rapidly below 20Hz. With no cone the rotary woofer achieves high efficiency at very low frequencies. Most subwoofers have a difficult time producing acoustic output below 20 Hz at audible levels. They generally require large amounts of equalization, distortion rises rapidly, and even the most expensive available cannot produce significant output below 10 Hz. Subwoofer electronics usually contain a cutoff filter which sharply rolls off content to the subwoofer below 20 Hz to protect the speaker. On the other hand, the rotary woofer has enough acoustic output to move an open door back and forth .5” between 1 and 5Hz! It has enough output to find resonance frequencies of walls and ceilings in a room. It requires no equalization to achieve flat response to below 1Hz. Microphones have low frequency capability that far exceeds the low frequency output of current subwoofers. In many cases infrasonic information is in a recording; it is just not being reproduced by the sound system.

A missing link in sound reproduction. Experience special effects like never before. If you want to hear and feel the 11 Hz hertz fundamental frequency from a helicopter rotor, the low frequency rumble of wind, the space of a concert hall or infrasonic information contained in an explosion, this is the only woofer technology available. Over the years the generally accepted low frequency limit of hearing has been 20Hz, some suggesting 16Hz. However nothing existed to produce significant enough output to change this belief. This development will spawn new special effects and we will begin to understand the true low frequency limit of human hearing. The TRW-17 rotary woofer is now being used in theme park attractions, concert venues, professional audio applications and research projects.

Note that for home audio the model 17 must be professionally installed in an attic, basement or side room which becomes an infinite baffle.


Amplifier Requirement 150 W @ 8 Ω
Maximum Output >115 dB @ 1-20 Hz
Suggested Crossover 20 Hz @ 18 dB/octave
Impedance 8 ohms 0 Hz - 40 Hz
Distortion 3% 1-20 Hz @ 90 dB
AC Input Power 200 to 240, 50/60 Hz, 5.4 A
Retail Price $13,350.00