The Harmony H650 is a 50-watt all-tube 1x12" combo for stages that need real volume. Two 6L6GC power tubes and four 12AX7s feed an Italian-made 12" Jensen Tornado Stealth 65. Analog spring reverb and analog tremolo are onboard. The four-position attenuator is there so you can still get power-tube grind in a club or a studio. Tubes, Speaker, and Effects The Tornado Stealth 65 is the loudest speaker in the Series 6 trio. Same control layout as the H620: 3-band EQ, Presence, tremolo speed and depth, reverb, pull-boost on Gain. Boost, tremolo, reverb, and the effects loop take a footswitch. Line out and an impedance-switched pair of speaker jacks round out the back panel. Specifications Output power: 50 W Speaker: Jensen Tornado Stealth 65, 12" 16 ohm Preamp tubes: 4 x 12AX7 Power tubes: 2 x 6L6GC Channels: 1 Controls: Master, Presence, Tremolo Speed, Tremolo Depth, Reverb, Treble, Mid, Bass, Gain (pull boost) Attenuator: 4-position (III, II, I, silent recording) Footswitchable: Boost, tremolo, reverb, effects loop Outputs: 2 x speaker (impedance switch), line out Effects loop: Yes Cabinet: Deep blue tolex, angled baffle, leather handle Mains: 120 V, 60 Hz (US), 180 W input Dimensions: 640 x 488 x 273 mm (25.2 x 19.2 x 10.7") Weight: 22.6 kg (49.8 lb) In the Box Harmony H650 tube combo amplifier Footswitch for boost, tremolo, reverb, and loop