1976 Marshall JMP 2203 Mk 2 Master Model 100 watt Lead

1976 Marshall JMP 2203 Mk 2 Master Model 100 watt Lead

Here we have a great first year example of this cross over amp into the modern JCM series of amps. Its in good working condition and comes with its Bulgin mains lead. It can be tried out here through a selection of cabinets. From the Solodallas.com blog.

in 1976, Marshall decided to try something new. After receiving many complains, they decided to put a Master Volume on their amps. They used the #1959 and the #1987 as a base, removed the normal channel and added a pre-phase inverter master volume on it, so it was possible to have the pre-amp saturation at lower volumes. The panel of this model had only 2 inputs, standard eq section , a Pre-Amp and a Master Volume knobs. They called it Marshall Master Model 100w Lead #2203 and Marshall Master Model 50w Lead #2204. Did it work? Yes and no. Yes, it was possible to have pre-amp drive at low volumes, but since it was the power amp saturation that made Marshalls so great, guitar players complained that they couldn’t get enough “distortion” at lower volumes. So… Marshall had to come up with something to solve this problem…

UPDATE: It seems that the early versions of the 2203 (100w – with the old cosmetics) already had the cascaded pre-amp. Only the 2204 (50w) suffered from the lack of gain at low volumes.

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phil@philsvintageguitars.com