N. POWER: Turns amplifier on and off.
O. IEC POWER INLET: Using the included power cord, connect to a grounded outlet in accordance with the INPUT POWER voltage and frequency specified at the power inlet.
P. USB PORT: Amp connection point for USB audio recording.
Q. FOOTSWITCH: Connect four-button MGT-4 footswitch (included with Mustang GT200; optional for Mustang GT100 and Mustang GT40) or the EXP-1 Expression Pedal here.
R. LINE OUT: Balanced line outputs for connection to external recording and sound reinforcement equipment.
S. FX SEND/RETURN: Right/left send and return for stereo external effects use. Effects added here are “global” (not preset-specific) and act as the last elements in the signal path (GT100 and GT200 only).
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