For anyone looking for a fantastic sounding amp this is the ONE. This is my secound one. Just beware you need relatively efficient speakers 90db and up. One is powering my Infinity RS1B mid/tweeter panels ( not too efficient a speaker but still pretty loud ). The other runs my Source Technolgies Carbon Woofer (8 inch woofer only ) speakers with ground shakong bass believe it. I've had Manley tube monoblocks, Pass Labs, Odyssey, Belles ( OCM ) 500, Counterpoint, PS Audio 250C monoblocks, Sonic Frontiers monoblocks, SAR Labs, Citation 16, Bedini 100/100 class A, and others. THIS IS THE BEST OVER ALL LISTENABLE AMP. The only better amp was a OTL amp. If you have the money buy the OTL OTHERWISE BEST FOR THE MONEY THERE IS. Honourable mention to Bedini, PS Audio and OCM 500. PS Audio 250C monoblocks run the bass on my RS1Bs.