QSC GX3 User Manual download pdf (Page 5)

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 amplier 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.

RED CLIP LEDS

Red ashing 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 ashing 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).

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QSC GX3 User Manual Page 5