The Guitologist | 6 years ago

In this video we'll take a look at a Marshall 2204 JMP mk2 Master Lead Head from 1977. We'll change power caps, troubleshoot a fuddled up tone stack, bias the 6550 (not EL34) output tubes, and perform some minor modifications. In the end, we'll demo the amp and find out what makes the 2204 Master Model the most pure and perfect tube guitar amp Marshall ever made.
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