I replaced a dead B&K ST1400 (lost one channel) with a UPA-2. I was immediately impressed with the packing and build quality.
When I placed it into my system driving surround speakers (Energy 22 Pros), I played several SACDs in multichannel mode and was taken by the way the UPA-2 opened the Energys up. The music was clear and highly detailed.
I guess it is possible that the B&K was slowly winding down to the point where the overall sound quality was incrementally decreasing over the years, but I actually think it played to it's spec up until the left channel gave up. My front speakers are Energy Pro RefCons being driven by a 3X200 watt B&K TX4430. I just might try running them with the UPA-2 and see how the RefCons sound with a 'budget" amplifier (I paid less for the UPA-2 than it would cost me to repair the B&K).
All in all, I am impressed and quite satisfied with this amp.
XMC-1 UMC-1 retired Sony VPL-HW40ES Optoma HD73 retired Optoma HD25e retired Carada 120" 3 UPA-1s Front 2 UPA-2s sides and rear Rythmic F12 SW NHT SW-1 Audiosource AMP100 Zone 2 Oppo BDP-83 Toshiba HD-A20 Adcom GCD-700 DirecTV HR44 Energy Pro 22 RefConns - Stereo Energy RC-LCRs L/C/R - HT Emo ERD-1s side and rear 8 Impedance match volumecontrols/speaker sets for Zone 2 Harmony One Remote Monitored Security Winchester Defender 12
I was checking out the UPA-2 at Emofest, and I want to build my monitoring system for my computer home studio with the USP-1,UPA-2 fully rack mounted in the bridge because they sound great and run cool. I want to tie in with the ERM 6.2s'. I think the ultimate 2 channel listening/monitoring system out there for the bucks. Who else makes an amplifier this good for so little money? A no brainer for me. All I need to do is come out of my USB/Dac to the mixer then Stereo buss out to the USP-1, and the tape, and the remaining 4 busses can come out of my mixer into my remaining USP-1 inputs. Heck I think I have a spare input on the USP-1 to do a direct send if I want.
The UPA-2 will then get the signal and send to the ERM 6.2s. I'll have to employ a Sub like one of Emotiva's to take care of the lower octaves of the music. Emotiva makes it so easy to do anything with their products especially the UPA-2 too. ;D