For the last year I've had twin SVS 20-39CS Subs powered by Parasound Mono Amps in my system. I don't think I need to go into how GREAT they sound because you've probably heard it a million times from others. I put together a relatively small (at first) A/V system for my Brother-in-law and of course I had to recommend SVS for the Sub. The budget he gave me to work with only allowed for the purchase of a single 25-31PC. I had it shipped to my house because I used my Credit Card for the purchase. It arrived yesterday and I unpacked it and did a quick test in my room. I disconnected my twin 20-39's and ran the signal line into the 25-31PC. HOLY CRAP....Does that sucker put out the BASS for its size!!!!! I didn't push it by any means and I even had the door open to my Theater Room that is normally closed for movies. I had the beach scene from DTS Saving Private Ryan running and was simply STUNNED. I think my Brother-in-law is going to be quite impressed with this sucker when I hook everything up on Saturday. If anyone has any doubts that the "little guy" for under 700 bucks can't compete with anything under 1,500-dollars, they are seriously mistaken. On the spec sheet it may not go as low as twin 39's or 46's, but lets just say it KICKS ASS !!!! Shawn S PS.....I got a "Grinch like" ear-to-ear grin at the thought of hooking up all three SVS's for a test, but the better half of me maintained control and I put it safely back in the box.