QSC Audio GX3 300 Gain CONTROLS, CH1, CH2, Rack Mounting, RED Clip Leds, Green Signal Leds

GAIN CONTROLS, CH1, CH2

The markings show attenuation in dB. For normal use, keep the control in the upper half of its

range (less than 10 dB of attenuation). If set below half, the source may overload before

the amplifier reaches full power.

RACK MOUNTING

Fits standard 19-inch rack, 2RU. Accepts #10 or 6 mm screws, as determined by the rack rails. Add rear support to prevent damage in portable rigs.

EN

RED CLIP LEDS

Red flashing indicates the amp is being overdriven. Heavy overdrive triggers internal gain reduction, to reduce overload distortion. Normal gain will resume after the signal level returns to normal. See Troubleshooting if the red LED remains on continuously.

GREEN SIGNAL LEDS

The green LED starts flashing on soft signals (-35 dB), and changes to steady green as the signal level increases.

BLUE POWER LED

The blue PWR (POWER) LED indicates that the AC switch is on, and the amp is receiving power. Within two seconds, it is ready to use.

ALTERNATE GAIN MARKING

When the CROSSOVER switch is active (see rear panel),

LF (CH 1) controls low frequencies (subwoofer),

HF (CH 2) controls the high frequencies (mid-high box).