Sadly, Jim Marshall, the Guv'nor, passed away on april 5th 2012. These amps were built as heads (or tops) separated from the speaker cabinets. These amps were introduced in april 1981, around the same time as the JCM800 series.
These amps were more or less a copy of the Fender 1959 Tweed Bassman. This was the combo version of the 2098 Master Lead head. The 2000 Lead and 2001 Bass heads are probably the loudest and most powerfull Marshall tube amps ever built.
The JCM800 series (Model 2210 and others) is a line of guitar amplifiers made by Marshall Amplification. Although models 22 had been in production since 1975, they were reintroduced as JCM800 amplifiers in '81.
The JCM800 amplifiers became a staple of 1980s hard rock and heavy metal bands.
This (a)(b)(c) sequence began in 1969 and was valid through 1983.
Initially using US amp parts he switched to UK components to save money.In 1981, Marshall finally reached the end of its 15-year distribution deal with Rose-Morris, which had severely limited its potential to sell amplifiers outside England; Rose-Morris tagged 55% onto the sticker price for exported models. M.", coupled with the meaningless "800" from the number plate on his car.The JCM800 was the first series produced after the contract expired. It was later noted that "800" stood for the decade.The switch from 6L6 to the KT66 valve gave Marshall amps a more aggressive tone.Eventually the KT66 became too expensive causing the jump to EL34 and even more aggression. [Source: Wikipedia] Dating Marshall cabs and amps Info from Wayback Machine Serial number (no barcode) version: Marshall Serial Numbers and Chassis Codes Does it have a serial number stamped on the chassis?
The very first Marshall amps that saw the light of day were called the JTM45 amps. This amp had 2 channels and 4 inputs and a reverb, identical to the Artiste 2068. The 2069 cabinet was a very tall straight front 4x12" cabinet.