This ground-up build is basically just an AC15 with an EF86 preamp and a top-boost preamp.
What makes it special is a switchable high voltage FET FX loop for each channel, and the ability to engage either channel by itself or both in parallel via the front panel switch or a standard 2-button stereo plug footswitch. The front panel indicator glows blue when the EF86 channel is selected, green for the top-boost channel, and turquoise in parallel mode.
