Hsu subs

There is a long list of reviews on the HSU 1220 and 1225 at Audioreview.com

I've had a Hsu 12va for 2 1/2 yrs, and I don't honestly know why I would ever part with it. They make a very nice product.

The Hsu amps have an equalization circuit in them that boosts peaking at about 19 hz and then cutting off at the low end. Essentially, the Hsu's are detuned a half octave lower than a true fourth order and then the boost brings them to flat down below 20 hz. The nice part of this is that in the range of boost, the port is radiating all the energy while the cone is not moving much (port resonance). Thus, the distortion remains very low

I use 2 TN1220HO subs & Hsu's Model 500 Subwoofer Amp crossed at 51 Hz to augment the low end of my Magnepan 3.5R speakers. For 95% of the music I have listened to, the 1220's blend into the speakers seemlessly; the 1220's are very clean sounding and powerful, but not boomy, and I have had no need to turn the dial on the sub amp past the 9 o'clock postion; I have listened to a home theater system pairing Velodyne's top-of-the-line 18-inch subwoofer with MG 3.5Rs, but the Velodyne's boomy sound muddied and ruined the sound coming from the speakers; If you just want to shake the building, go with something like Velodyne, but for reference-quality bass extension, I find the TN1220HO subs worthwhile.

I owned a pair of 10sw's These were the first HSU's offered, I can tell you I miss them bad. I'm going to order the newest thing he has to offer. They are simply the best you can do for the money!!!!Thanks, Richard