Fender Super-Sonic Twin 100-Watt 2x12-Inch Amplifier - Black and Silver A 100-watt, two channel tube amp producing classic Fender clean tones, molten high-gain tones and every shade of overdrive in between. Arena/Club switch reduces power to 25 watts. Notch Tune control allows you to fine-tune distortion characteristics for authentic American and British amps sounds. Rear-damping control allows you to select "normal," "loose," or "tight" speaker damping. Automatic bias control allows you bias your tubes hotter, cooler, or to factory spec with the need for meters or tools.