David Drake

What about the 15 inch used in the Speakerlab Ks? It had an Fs of 16 Hz and QTS I am told of .19. By accident ( my sister had tape monitor on tape did not get any sound, turned the receiver volume all the way and trying to get sound put monitor on source.)!!!! on the first band of the record Earthquake movie soundtrack pushed by a Marantz 2270 at full volume. My sliding glass door was cracked from top to bottom, and neighbors asking if we felt the tremor!