I recently picked up a Velodyne DD-12 (part of the Digital Drive series), and it has been the most significant upgrade that I have done. My gear is more than capable of reproducing clean, accurate deep bass - Thiel CS3.6's, with Theta Enterprise monoblocks. But my room is an acoustical nightmare, with no low frequency reinforcement and numerous peaks and valleys in the low frequency response. The ability of the DD-12 to analyze the low frequency performance of your system, in your room, and then to fine tune the sub's performance to correct for it, it nothing short of revolutionary. What a tremendous differnece it has made! As an end result, my system is more accurate, and I believe more musical. I bought the 3.6's because I didn't want to have a subwoofer. And in most rooms, there is no need whatsoever for a sub with 3.6's, but in my room, adding the DD-12 made a tremendous improvement.
As for musicality, the Digital Drive series employ Velodyne's servo technology (which keeps the cone from continuing to vibrate after sounding the note), and even give you control over how strong the servo response is. This means that you can have one preset that is geared towards HT, and one that is tighter, and geared towards music. Or, do like me, and keep it all nice and tight. With a 1,250 watt RMS amp, my little DD-12 can keep up with the big Thiels quite nicely.
Highly recommended.
Tom.
