1964 MARSHALL JTM45 ANATOMY
The JTM45 shares much of its DNA with Fender’s Bassman 4x10 combo, in particular the 5F6-A circuit. This was the last ‘tweed’ update, introduced around 1958 and phased out in 1960. The Bassman was originally intended to complement Fender’s new Precision bass guitar, although as it evolved from a 1x15 TVfronted combo
