[PD] [OT] Bass driver unit

Charles Henry czhenry at gmail.com
Tue Jan 8 16:02:22 CET 2008

I would love to get my hands on one of these:

Thigpen rotary vane loudspeakers are like a sub-subwoofer, because
they have a low-pass characteristic rather than band-pass.  It's the
only loudspeaker that goes all the way down to 0 Hz.


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