I had the vtf2 mk3 and it was a good sub. I sold it to my friend for $350 and he is absolutely amazed how it shakes his room with good bass. I see him occasionally and he keeps smiling and tell me it is the best sub he owns and the best $350 he ever spent. Back in 1999, HSU and SVS were the two ID sub companies that drew lots of attention. They still do but there are more choices now: Outlaw, PSA, Rythmik, Chase, JTR, Submersive, etc... Just saying.