Here is a copy of my review of the MartinLogan Depth subwoofer I just added to my 2 channel system. This is from Audioreview.com! Reviewed by: Pummill, AudioPhile Price Paid: $1700 at Audible Elegance Product Model Year: 2004 Summary: Just picked this sub up last night to compliment my Magnepan 1.6QR's. I was looking at something that would have tight, fast, bass to match my maggies. I have found it in the Depth. Currently, I am using it in a 2 channel set up, but I will soon be build a dedicated room that will include 5.1 music capabilities as well as a future home theater set up. I had thought about getting a Rel Strata III, but after hearing this sub, i knew that it would be a good match with the maggies. The Depth has excellent hook up possibilities for both music and movies. MartinLogan and Magnepan....a match made in sonic heaven!! Strengths: Ease of hook up and versatility of tweaking the sound. Fast, tight, clean, powerful BASS!! Weaknesses: None so far. Similar Products Used: Paradigm PW-2200, SVS PC-Ultra,Velodyne CT-120. The Depth beats all of these subs that I have owned!! I also have a HT system in my family room consisting of 6 B&W speakers along with my beloved SVS PC-Ultra. The Ultra is one great sub for HT, but I have found the Depth to be a better match with my maggies. I am thinking that I may upgrade to even higher end components in a 2 channel system downstairs, along with 5.1 music capabilities, and watch movies in the family room. I have always been about an 80/20 music over movie man!!