Abbingdon Music Research AM-777 Premier Class - Manual (Page 6)

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3.9 Speaker Impedance 14
3.10 Mains Voltage switch 15
Section 4 - Advanced Features
4.1 Labelling of Inputs and Setting Level Offset 17
4.2 Labelling Input X 19
4.3 Setting Level Offset 19
4.4 Setting Fixed Input Level for Bypass Mode 20
4.5 OptiProtect® Speaker Overload Protection 22
Appendix A - Troubleshooting 23