The Marshall 2204 JMP MKII Master Volume Lead is a very simple, yet very loud 50-watt all-tube amp that gives the highly sought after “Marshall tone”. The 2204 is set up with three pre-amp tubes (12ax7), and two power tubes, normally 6550s or el34s. Most people prefer the British sound of the el34. The only knobs found on this amp are for Presence, Bass, Middle, Treble, Master Volume, and Pre-Amp Volume.
It only has a single channel, but inputs for High and Low Sensitivity allow you to play anything from super clean to super raunchy with just the turn of a volume knob. As far as volume, this thing is LOUD, basically like any Marshall. Get the thing above a four or five and your ears will be ringing for days! If you can pick one of these beauties up, do it. They are becoming more rare and are some of the best sounding amps ever made.
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