Marshall Shootout - JCM 800 vs JCM 2000 vs 2555X vs 2558

Song Loop - Alice In Chains - Man in the box

Signal Chain
Gibson Les Paul Supreme
Boss DD200 (for loop recording)
Boss SD-1 (JCM800 ONLY)
Marshall 2558 50w combo/ Marshall 2550x 100w Reissue
Marshall 4x12 MF400 Celestion K100 speakers
Shure SM57
API512C
Lynx Aroura
Pro Tools

Hands-on thoughts:

JCM800
Certainly has less gain than the other three, hence the BOSS sd-1 (the ultimate overdrive for a JCM800 IMO feels the closest to just turning the gain up) but it has the biggest and most open low end of them all and its the punchiest and clearest of them all.

JCM2000
Probably the best tube amp you can buy for the money, so versatile and really holds its own against these classics. Modern classic IMO. Certainly has a bit of a modern tone to it compared to the others and much more gain than the others. The clean/mid-gain chain really leaves a lot to be desired at least compared to the other amps. I see this as a bit more of a modern chug machine with a big nice clean channel for simple sparkling clean riffs. Hard to get vintage tones of out this that feel really good.

SILVER JUBILEE
The reissue is certainly built much better than the original, though the original does have a certain smoothness to it perhaps just from the age of the components and partially because it's a 50w. Ended up keeping the reissue mostly because it's a head and easier to use with my cabs. I think I prefer the sound of the 100w as well.