From: Kris Kirby .... I play bass, and lacking a good amp, I process my music through a compressor, mixer, and EQ before sending it to a $125 50Wx2 Aiwa reciever. That Aiwa drives two Sony bookshelf speakers (8" W, 12" T, 10" D) and does a much better job of reproducing my bass than the 10W amp's own 8" speaker. Then again, that setup doesn't compare to my father's Ampeg BA-115. That's a 100W (Class-A finals) amp with a 15" speaker. It *will* rattle the walls. (But then again, houses aren't as thick as they used to be, nor use as much material.) --