Despite hearing all the testimonies of praise for the SVS subwoofers all over the net, I have been a little apprehensive about purchasing any speaker without hearing it first. When I was at CES, I was given the opportunity to hear the Earthquake sub and was really blown away by it. Since I got great pricing on it, I took advantage and grabbed it immediately. This sub dwarfs my Sunfire True Sub in sound and size. It is a sub with two 15" elements and is remarkably powerful. I can feel my pant legs moving at times! I sampled various demo DVDs such as Jurassic Park III and U-571, and it was just amazing how much I can piss off my neighbors with this thing. I also found it to be excellent with music also as it is quick and tight...very responsive with no muddiness. It played complex bass lines quickly and easily. My friend recently won an SVS Sub at the AVS Forum dinner. I look forward to finally hearing one and draw comparisons.