Abbingdon Music Research AM-777 Premier Class - Manual (Page 14)

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3.5 Mode switch
At the rear of the AM-777 the “Mode” switch (R10) allows the AM-777 to alternate between Stereo/Monoblock/
Bi-Amplifier modes.
3.6 Pre-Main/Power switch
At the rear of the AM-777, the “Pre-Main/Power” switch (R11) enables the AM-777 to alternate between Pre-
Main or Power amplification modes.
3.7 HiFi/Pro switch
At the rear of the AM-777, the “HiFi/Pro” switch (R3) allows for a source with a transformer balanced output to be
connected to the AM-777.
3.8 Preamplifier Output connector
At the rear of the AM-777, the preamplifier output (R9) allows the AM-777 to drive other amplifiers (including AM-
777 switched to power amplifier mode) or subwoofers. The output level of the preamplifier output varies with
volume changes on the AM-777.
3.9 Speaker Impedance switch
At the rear of the AM-777, the 4R/8R speaker impedance switch (R12) allows the AM-777 to be configured to
correctly match the impedance of the speakers used.