not much similarity at all.
the M-50 is two generations older and considerably less power.
the M-85 had dual power transformers and made about 300 wpc while the M-70 was a carver licensed switching and triac controlled design.
the M-50 is two generations older and considerably less power.
the M-85 had dual power transformers and made about 300 wpc while the M-70 was a carver licensed switching and triac controlled design.