That Dorey guy knows what he is talking about. I got to hear a Sunfire (legendary Bob Carver designed) subwoofer a few weeks ago at the local Ultimate Electronics. It had dual 12" woofers that fired in opposite directions powered by a 1000 watt amp. The woofers were about as rigid as a watermelon. The tightest, loudest, cleanest bass I have ever heard. It cost $1800 and I woke up from my dream. When I win the lottery, I'm getting two of those bad boys in my system.