This amp has 4 x 12AX7 in preamp section and 4 x EL34 in power section. Covers everything from blues, classic rock up to 70-80 hard rock. Two channels, clean and overdrive + voicing. All controls are for both channels except overdive control which is only for OD channel. Includes FX loop, reverb, presence, bass, mid, treble, master, overdrive (gain). This amp has 60w-120w switch.