Abbingdon Music Research AM-77 Reference Class - Manual (Page 34)

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• Same as Mode III, except the Pre-Amplifier
section has been bypassed.
• A separate pre-amplifier is needed to control
the volume.
Mode VI. Power Bi-Amplifier
L
1st AM -77
Power
Amp
(R)
Power
Amp
(L)
R
2nd AM-77
Power
Amp
(R)
Power
Amp
(L)
Left
Speaker
Right
Speaker
(L)
(L)