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- 100W, 1-15 in. speaker, tube chassis, preamp: 3 X 7025, 2 X 12AT7, 12AX7, power: 4 X 6L6GC, two channels, reverb, vibrato, silverface control panel, four inputs (two normal, two vibrato), bright switches, 12 silver-top knobs (Norm: v, t, m, b, Vibrato: v, t, m ,b, r, s, i, Both: MV), black tolex covering, silver grille, mfg. 1972-1981.
No, that is not an error in spelling, it is the Vibr-O-sonic. This amp was released nine years after the original Vibrasonic was released, but it is more similar to the Twin, Quad, and Super-Six Reverb amps. It doesn't have a lot to do with the original Vibrasonic. In 1974, a less expensive JBL D-130F was offered for a speaker. In 1976, a distortion switch was added to the master volume knob. In 1979, the JBL speaker was replaced with a 15 in. Electro-voice.
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- 25W, 1-15 in. JBL speaker, tube chassis, preamp: 5 X 7025, power: 2 X 6L6GC, two channels, tremolo, brownface control panel, four inputs (two normal, two vibrato), nine brown knobs (Norm: v, t, b, Vibrato: v, t, b, s, i, Both: p), br...
