- 33W, 2-12 in.G12M-25W "Greenback" speakers, tube combo, preamp: 5 X ECC83, ECC82, power, 4 X EL84 (class A), GZ34 rectifier, three channels, vibrato/tremolo, top control panel, six inputs (three per channel), eight black pointer knobs (v for each channel, vib/trem speed, vib/trem, b, t, cut), black covering, diagonal brown grille, three handles, mfg. 1993-2004.