This 20 watt/channel DC integrated amp sounds rich, powerful and really musical. I think it sounds better than an NAD 3020, in a quick comparison. Very revealing of bad source material, it shines with good recordings.
I found this unit and opened it up. It uses a heavy transformer for it's power and beautifully made circuit boards with point to point wiring. It runs hot, and has a very cool (looking) heat sink that is exposed at the back.
Made in Japan from 1973-1975 this was one of Sony's best pieces, exported to impress and open up the north american market.
I am really enjoying the music with this amp!