Charlie Brown V4

JHS built the Charlie Brown to capture the gritty character of Marshall JTM45 amplifier heads—the vintage British amps that defined sixties rock. The circuit converts any amp into a JTM45 stack, delivering authentic tube-like response without hauling vintage iron.

Version 4 adds Marshall-style 3-band EQ with Bass, Middle, and Treble controls that shape the overdrive character. Drive and Volume interact like a master volume amp head, with the Drive functioning like you're pushing tubes into saturation. Your guitar volume knob cleans up the gain without losing clarity, reacting just like a classic tube amp should.

The circuit spans Clapton-style crunch through thick, liquid rock tones. Perfect for stacking with other overdrives to build complex gain structures. At 9mA draw, it's remarkably efficient. $199 for vintage British tube amp tones without the backbreaking weight.