Here's another Champ: this one comes from the very late 70s (or early 80s). Like the others, this one's an all tube, 4-1/2 watt practice amp with one eight-inch speaker. The Vibro-Champ differs from the regular Champ in having one extra pre-amp tube to serve as the tremolo (or should I say vibrato?) oscilator. The extra couple of knobs on the front are the speed and intensity controls of the tremolo feature, which join the basic volume, treble, and bass controls of the regular Champ.

Like the Champ, the circuit of the Vibro-Champ remained unchanged from 1964 to 1982.