Hughes & Kettner Switchblade 100 Guitar Amp Head 100W2 - 12AX7 preamp tubes, 4 EL34 power tubesFour channels: Clean, Crunch, Lead, UltraDigital reverb, delay, modulation effectsFull programmability with 128 preset slotsFSM 432 MIDI footswitchParallel/serial selectable FX loops