Abbingdon Music Research AM-77 Reference Class - Manual (Page 27)

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5.1 OptiOperation® Different System Configurations
In keeping with AMR’s philosophy that ‘no one sound fits all’ the AM-77 is adaptable to suit virtually any system
configuration; able to operate at one end as a Pre-Main stereo amplifier and at the other, as a single-channel power
amplifier. In Pre-Main amplifier mode, the AM-77 will use both the pre- and power amplification sections: the AM-
77 controls volume level and input selection controls. In Power amplification mode, the AM-77 wil require an
external, separate pre-amplifier to handle volume and input selection duties.
The following section describes alternative configurations for the AM-77 beyond the factory default: Pre-Main
Stereo amplifier setting. With diverse system permutations in mind, the AM-77 has built-in, six OptiOperation®
modes to seamlessly integrate into virtually any audio system configuration:
Mode I. Pre-Main Stereo amplifier mode (default)
Mode II. Pre-Main Monoblock amplifier mode
Mode III. Pre-Main Bi-amplifier mode (horizontal biamping)
Mode IV. Power amplifier Stereo mode
Mode V. Power amplifier Monoblock mode
Mode VI. Power Bi-amplifier mode (horizontal biamping)
The combination of synchronising multiple AM-77s together in practical terms is limited only by room size and cost.
This approach allows for systems at the core, comprising of any number of AM-77s to be constructed to any level
of complexity.
Section 5 - System Configurations
Six different modes
It is assumed all
prior sections have
been read &
understood with all
requisite connec-
tions made
Supreme adaptability