The “Ampenstein” amp head is an all pentode amp, made up of two pentode gain stages (EF86 and 6J7) with a Baxandall tone stack (bass and treble) and a triode strapped 6J7 phase splitter driving a pair of 6L6GT power valves for 25 watts. GZ34 valve rectifier power supply.
The amp is finished with the steampunk aesthetic, with a brass plate etched using electrolysis and mild acid. The pattern behind each control knob is taken from the 2010 season of crop circles in the UK. If Doctor Frankenstein played guitar, he would have used this amp.
“Ampenstein can achieve controlled distortion from ANY and ALL of the valves from preamp to phase inverter to power section! I only had a half hour to mess with it last night, but there are at least 3 or 4 tonal flavours available seperately – one from from each valve, and these can be combined for even more flavour.“