- 120W, 2-12 in. heavy-duty speakers, tube combo with 4 X EL34 power tubes, dual channels, reverb, distortion, top control panel, four inputs (two normal, two bright), 14 black knobs (v1, v2, b, m, t, presence, five band harmonic balance knobs, distortion, r, MV), brown covering, brown diagonal grille, mfg. 1975-late 1970s.