The ATC P1 Power Amplifier packs 150 watts per channel in class A/B operation within in a dual mono design.
"...if you want to hear the important musical detail presented in a coherent, clear-cut fashion this pairing (Inc CA2) has remarkably little competition in the two box arena. There are a few integrated amps which give them a run for their money in one respect or another but nothing comes to mind which seems like a better overall package."
Jason Kennedy HiFi Plus
ATC P1 Power Amplifier / ATC Website