So, I decided I wanted to finally build myself an amp after thinking about it for a couple of years. I started with jcm800 2204 kit from from Ceriatone and had them modify the chassis for an additional preamp tube, loop send and return levels on the back panel, a loop bypass toggle and two additional front panel controls. Taking inspiration from modded 4 input JMP heads I had the 2 added pots placed next to the input jacks, vertically. I also had them powder coat the chassis black to protect against any accidental shorts to ground and, well, it looks cool. Front controls are your typical pre/master volume and TMBP tone controls. The added controls are SLO style depth and a ppimv. On the back panel, in addition to the normal features, there is a half power switch, external bias points, and active send and return effects loop levels. The effects loop is placed after the tone stack but before master and is driven by the added preamp tube. I designed a pot mounted pcb to hold the additional components for the loop which is the small green pcb visible in the internal shots. The loop can be completely bypassed with the toggle below the loop jacks. When nothing is plugged into the loop, the jacks are internally jumpered allowing the loop to add an additional gain stage to the preamp. #snk2204 #snk2204 #diy #2204 #marshall #modded #cleantone #ceriatone
