Fender Eric Clapton Series EC Twinolux 40-Watt 2x12-Inch Guitar Combo Amp 40 watt, hand-wired, all tube circuit based on a '57 Tweed Twin has built-in power attenuator and option to disable one speaker to reduce over-all volume when cranked up. Perfection for stage and studio. Foot switchable '50's-era Output Tube bias tremolo (with Speed and Intensity controls) offers a deeper throbbing pulse than latter tremolo varieties. Dual Special Design 12" Weber alnico magnet speakers (by Eminence), custom Mercury Magnetics transformers, and a finger-joined solid pine enclosure produce a warm, dynamic, touch-sensitive response.