This early (1968) silver face amp produces 45 watts from 2 6L6GC output tubes. The circuit is the AB165 version, which differs from the black face (AA165) circuit only in that the later amp has a network of solid-state rectifiers in place of the single rectifier tube of the earlier amp. The other features of this amp include two completely separate channels. Each channel has two instrument input jacks and controls for volume, treble, and bass.

The tone of these amps is greatly improved by jumpering the #2 input of the first channel to the #1 input of the second channel whenever the amp is being used to amplify a single instrument. This brings another half of one of the 12AX7 preamp tubes into play to increase the current output from the preamp. After the jumper (a 6 inch cable with a 1/4" male phone plug at each end) is installed, it doesn't matter which of the two remaining inputs is used for connecting the instrument (bass or guitar).