A landmark year for Jim Marshall was 1987. It marked 25 years in the amplifier business and 50 years in music. This was celebrated with the release of the Silver Jubilee series of amps. The Silver Jubilee series consisted of the 2555 (100 watt head), 2550 (50 watt head) along with other 255x model numbers denominating various combos and even a “short head”. The Jubilee amps were heavily based on the JCM800s of the time, featuring a very similar output section along with a new preamp. Their most publicised feature was the half-power switching, which is activated by a third rocker switch next to the standard “power” and “standby” switches. On the 50 watt model this was reflected in the numbering – 2550 is switchable from 25 to 50 watts – and also reflected Marshall amps’ 25th anniversary and Jim Marshall’s 50 years in music. The amps were trimmed in silver covering, and had a bright silver-coloured faceplate, along with a commemorative plaque.
Ceriatone Marshall 2555 Layout:
Marshall JCM2555 inside: