❌SOLD❌ Marshall JMP 2104 2×12 50 Watt Combo Amp, 1981

The single-channel Marshall JMP 2104, built from 1975 to 1981, was the 2×12 Combo version of the JMP 2204 50 watt head and one of Marshall’s earliest Master Volume designs.

In 1981, Marshall’s distribution contract with Rose Morris expired. While this had initially been to Marshall’s benefit, their export pricing structure placed these amps in the top tiers of pricing, with the effect of reducing sales growth.

Here we’re looking at a Marshall JMP 2104, built at Marshall’s shops in Bletchley during 1981 – one of the last amps of this series before the design was updated and the naming changed. It delivers 50 watts through a pair of 12 inch Celestion G12-65 speakers. These amps, a with most other Marshall models after 1973, use printed circuit board construction, as distinct from expensive and tim-consuming hand wiring.

The Marshall JMP 2104 is well regarded for the quality of its tone. It’s a solidly built amp, with a finger-jointed Birch ply cabinet. This solid construction does mean that the amp has some heft, and it comes out to approximately 65 pounds or just under 30 kilos.

This amp has been used as intended, and as happens the tolex covering has a few tears. The owner used a strip of masking tape by the controls with notes for knob settings. It is in good working order, and has that full, rich, Marshall tone with undeniable presence.