New approach to amplifier protection

Yamaha didn't really build most home product to that level by that time period. Home product was all sheet Al fins and TO-3P outputs. The PC2002 was completely different and used TO-3 output transistors. The P2200 isn't as clean, but it is still a great amp. Really heavy heat sinks and TO-3 outputs as well. Huge Toroid that would mash the meters if the amp fell on it's face in a rack (seen that once or twice!). I was warranty for both consumer and MI product then.

If I had a clean PC-2002, I would use it in my living room. The cosmetics are way better than the Bryston 4B cubed (which is a fantastic amp). Some of the M series was pretty, but lightly built and not as clean. I wouldn't bother with one. The M4 was pretty close to being the way Marantz built their stuff in the late and earlier 70's, similar to my 300DC amps (1980 - ish).

The M-2 looks pretty similar, I'd have to see them on my bench to be certain. It may be closer to the P-2200, we'd have to check the year of manufacture to tell easily. Pretty robust.
 
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