Hi again, let's see if I can get this right. The 5010 Master Lead Combo was the transistor equivalent of the JCM 800 model 4010 50w 1x12 combo.

I will try to link schematics of each below for evaluation.

All right, thanks guys, I'll research and post some more specific details. Again thanks for the welcome and no flames!

Mike

Hi all, I've been playing guitar since about 1985 and have owned all kinds of gear at one time or another. I've owned several various tube amps and been successful tinkering with their innards.
I now have a Marshall Master Lead Combo Model 5010 dated circa. 1986. It's just like one I used to own in 1989. Lately I have been into reacquiring retro(old) gear I used to have.

This amp was supposed to be the solid state equivalant of a JCM 800. Well, to my ears...maybe.

I want to change some tone stack values around, and my question is if this is supposed to sound like a JCM 800 why is the tone stack so different?

Has anyone around here messed with one of these?

Thanks so much...Mike