No. of Channels
Two-Channel
Amp Type
Tube
Inputs
Four inputs (two per channel with one each for normal and bright)
Outputs
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- 300W, 16-10 in. speakers (two 8-10 in. speaker cabinets with four separate compartments for each pair of speakers), bass piggyback configuration, 14 tube chassis: preamp: 4 X 12DW7, 1 X 12AX7, 2 X 12BH7, 1 X 6C4, power: 6 X 6550 (early models featured 6146), solid-state rectifier, two channels, front silver (1969-1980) or black (1981-85) control panel, four inputs (two per channel with one each for normal and bright), seven knobs (Ch.1: v, t, m, b, Ch. 2: v, t, b), ultra-high and ultra low switches for each channel, three-way mid-range selector switch on Channel 1, black covering, blue/gray grille (1969-1980) or black grille (1981-85), mfg. 1969-1985.
Early models were equipped with 6 X 6146 power tubes, but were discontinued shortly after the SVT was introduced because they ran too hot. There was a recall issued in 1972 to update all of the amps with the more reliable 6550 tubes and other modifications. It should be noted that any model still equipped with 6146 tubes are worth significantly less because the amp does not run properly. When MTI took over in the early 1980s they produced the SVTs in Japan with Japanese parts and the 12DW7 preamp tubes were replaced with 12AX7s.
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- 300W, bass head-unit only, 12-tube chassis, preamp: 3 X 12AX7, 3 X 12AU7, power: 6 X 6550, two channels, front silver control panel with blue lines, four inputs (two per channel with one each for normal and bright), seven knobs (Ch. 1: v,...
- 100W, bass head unit, seven-tube chassis: preamp: 3 X 12AX7, power: 4 X 6550, solid-state rectifier, single channel, front black control panel, two inputs, six black knobs (pre v, MV, b, m, t, p), ultra hi switch, ultra lo switch, power s...
- 300W, bass head unit, 14 tube chassis: preamp: 5 X 12AX7, 2 X 12BH7, 1 X 6C4WA, power: 6 X 6550, solid-state rectifier, two channels, front black control panel, four inputs (two per channel with one each for normal and bright), seven knob...
- 300W, bass head-unit, 11-tube chassis: preamp: 3 X 12AX7, 2 X AU7, power: 6 X 6550, solid-state rectifier, two channels, two inputs, six black knobs (g, b, m, five-position mid-range freq, t, MV), standby switch, power switch, transformer...
- 300W, bass head unit, 11 tube chassis: preamp: 3 X 12AX7, 2 X 12AU7, power: 6 X 6550, solid-state rectifier, single channel, front silver control panel, two inputs, six knobs (g, b, m, five-position mid-range freq., t, MV), ultra-high and...
- 300W, bass three-space rack-mount head, 12-tube chassis, preamp: 4 X 12AX7, 2 X 12AU7, power: 6 X 6550, solid-state rectifier, single channel, front black control panel, two inputs (normal, bright), five knobs (v, t, m, five-position mid-...
