I have a Kenwood KA9100 integrated amp in my garage system (now that I've elevated the modified T Amp to in-hours status). The KA9100 has twin power meters and drives a pair of 87db efficient (not very efficient but great sounding speakers) Dahlquist DQM905s. I have never seen the meter indicate output of greater than 5 watts per channel. I don't play head banging music at deafening levels, but I'll get the jazz and Eric Clapton going pretty good.

Enjoy the Music. Trust your ears. Laugh at Folks Who Claim to Know it All.