I've had this sub for four months now and find that the 150 watt rms 15" driver provides nice tight bass and is in like new condition. It retails for $599 and is on sale now at www.hifi.com for $449. My selling price is less than one half their sales price. I talked my wife into letting me spend some major bucks on a Velodyne or SVS setup but she says sell this first. So somebody help me upgrade.