Abbingdon Music Research AM-77 Reference Class - Manual (Page 6)

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3.8 Hifi/Pro Switch 18
3.9 RS232 Option Connector 19
3.10 Menu (RC-77 only) 19
3.11 OK (RC-77 only) 19
3.12 Mute (RC-77 only) 19
3.13 Brightness (RC-77 only) 19
Section 4 - Advanced Features
4.1 Labelling of Inputs and Setting Level Offset 21
4.2 Labelling Input X 23
4.3 Setting Level Offset 23
4.4 Setting Fixed Input Level 24
4.5 OptiProtect® Speaker Overload Protection 25
4.6 OptiMains® Protection for Excessive Under/Over-Voltages 26
Section 5 - System Configurations
5.1 OptiOperation® Different System Configurations 27
5.2 Connection of more than one AM-77 28
Mode I: Pre-Main Stereo 29
Mode II: Pre-Main Monoblock 30
Mode III: Pre-Main Bi-Amplifier 31
Mode IV: Power Stereo 32