In this thread I did mention I was getting a Paradigm Defiance X12 subwoofer for my 7.1 surround system and compare it to the SB-3000 on my 2.1 system. As far as the subwoofers are concerned the ported X12 works wonderfully in the living room and the SB-3000 is perfect for the office. To my ears, I cannot tell the difference as both will shake the room, and the base is well defined. Using the movie Avatar, there is plenty of base in the sound track and either on the LX-16/SB3000 on the computer or the Yamaha/x12 in the living room I still get massive base response. I hope my neighbors don't mind!