I had two red JCM 800 2203 model amps that were killer sounding for rhythms and leads, sucked for cleans on the second channel, so all I could ever do was turn down the volume knob on my guitar for cleans.
Sold it eventually because the tolex turned from red to pink on both of them which made it the only reason they had to be sold plus I was told the cost to get it retolexed was like $800.
I missed those amps for a long time.
I was new to playing on Marshalls in my early years and I had just gone from a single 50 watt Marshall that had no gain in it and I had to use a distortion box to get any gain then my roadie forgot one night to bring the distortion box to a show for me.
There I was playing the first two songs without any distortion because I didn't have a distortion box (and they were Metallica covers).
Then some guy from the crowd asked me why the hell was I playing without any gain and I said I didn't have my distortion box because the roadie forgot it.
He jumps up on stage and turns the gain knob up then jumps back into the crowd.
I was completely blown away.
In fact, everyone in the band and crowd was blown away.
They turned and looked at my amp and had the stupidest looks on their faces because we were all hearing something we never heard before - A massive wall of sound!!!!
All 4 Marshall cabs were being pushed with incredible high gain!!!
I only had the amps for about a week and I was knew to high gain amps so I didn't know anything about the knobs except for what was in common to my 50 watt Marshall.
Well, I tossed the orange Boss distortion box into the trash later that night and never looked back.
Actually, my roadie dug it out of the trash and took it home, lol.