"Larry" wrote in message
...


You also don't
need a $1200 woofer that can reproduce 10-50 Hz, because the only thing
down there is turntable rumble and a few heavy trucks rattling FM
detector's tuned circuits, in older radios. Shhh...this farce has been
successfully sold the the public since WW2. It made many billionaires!


Subsonic frequencies are often recorded as low frequency effects in some DVD
movies. Watch "Das Boat" on a home theater system equipped with an 18"
Velodyne subwoofer and you will be convinced. Nothing you hear, but
certainly something you feel.

Eisboch