I recently pulled out my 1970's Technics SU-7600 integrated amp to use with my monitor audio S1 speakers. Its 41wpc and prbably puts out almost twice that rating. I've forgotten how good this amp was. I also have an early 1980s Yamaha A-400 40wpc amp and compared the 2. The Yammy sounds awful.

The Technics is warm, detailed with great high frequency sound. It weighs a ton for a 40wpc amp. They dont make them like this any more. I paid $175 for it back in 1978 and it listed at $225. I hope it never breaks down.

http://www.classic-audio.com/technics/SU-7600.html

http://www.hifigoteborg.se/technics_su7600_spec.htm