wattage100WchannelsNormal, Brightinputsoutput2 x 1/4" Speaker Outpreamp valves4 x ECC83 (12AX7)output valves4 x EL34controlsimpedanceSwitchable using Impedance Selector on the rear panel — 4 Ω, 8 Ω, or 16 Ωheight255mm (~11")width630mm (~25")depth280mm (~12")weight21 Kg (~47 lbs)