I’ve got a 2100 SL-X here at the studio. It’s a serious amp for sure! I want to send that and my JCM Slash to Cliff to model someday. The Slash is a killer Jubilee (destroys the new reissue), so that one has become my new favorite Marshall for harder rock stuff.Finding an old thread, but the JCM900 2100 is the version to model if this is ever to be considered.
Has a very nice warmth to it. Popular amp used a lot in mid 90s death metal the way they fed those keeley-modded TS9's into them, or even after a Proco Rat for thicker stacking like Trey Azagthoth of Morbid angel always did from his Rack Rat R2DU (with one side of the two built in rats he had modified and using either or even double stacking them into the amp with each module on low to moderate gain and the amp dialed to about the same.
900-2100 was an unbelievable warm sound but still stayed very clear and focused. I will never forget when I was in the presence of such amps. I may try to pick one up.