“tricky”

 

this super-trick versatile 40 watt guitar amp circuit was developed over the course of 2 years of gigging, rehearsal, and refinement. Large plate 6SL7 preamp tubes and 6550s in class A make it totally unique among guitar amplifiers.

solid fine silver wire
tube rectified and tube regulated power supply
DC filaments for low noise
master volume without tone loss
switchable output impedance 4,8,16 ohms