Originally Posted by Divebombs
The later 2203's (horizontal input) and the 2210's where short one CAP from the original JCM800 series which people claim gave them Less balls. The 2204's and the 2205's did not have this issue as the used the same amount CAPs in both old and new.
Really there is no difference between running a SD1 full gain/full drive on a JCM800 2204 and running a SD1 with drive maxed but gain almost off on a 2205. Here is a quick explanation for people that don't know, I am sure a lot of you know this already though.
SD1 (or Overdrive of choice) drive maxed but no gain is basically just taking your guitar line level and boosting it to slam the pre-amp tubes to make them distort more, this was common on the 2205/2210's and what most people do on Mesa's and other amps these days.
SD1 (or overdrive of choice) drive/gain maxed add's diode clipping from the pedal into the chain, you are not only slamming the pre-amps but also adding distortion from the pedal, basically the same as diode clipping in the 2205 pre-amp section.
You are pretty much right to some aspect, early 80's bands used 2204/2203's and JMP's, the later bands (up and coming) used the 2205/2210's. You were close on the order, it goes JCM800 2205/10's ->Silver Jubilee ->JCM900's. The silver Jubs were in production (production started 1987) at the same time the JCM800's where, actually a lot of these amps overlapped each other. You will also see A lot of the earlier 2204/03's or JMP's that have been modded with extra gain stages or in Jake E. Lee's case and some others used the Kasha mod. Most seasoned musicians either kept their modded amps (Doug Aldrich still to this day) or went the Soldano SLO road.
Great example of 2205 tone is Tom Morello from Rage Against the Machine, his main amp has always been a Marshall 2205.