Abbingdon Music Research AM-77 Reference Class - Manual (Page 35)

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5.3 Switching and Connection Diagrams for Different Modes
The following is a description of the switch settings and connections required to engage the various modes.
Mode I: Pre-Main Stereo amplifier (default)
This is the factory default setting: the connection for which has been described in detail in Section 1 - Setup. We
have illustrated the default switch positions here for ease of reference to re-configure from an alternative system
setup back to the Pre-Main Stereo amplifier mode.
The default
factory setting