User manual QSC AUDIO GX REV A

[. . . ] Install in accordance with the manufacturer's instructions. 8- Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. 9- The appliance coupler is the AC mains disconnect and should remain readily operable after installation. 10- Do not defeat the safety purpose of the grounding-type plug. [. . . ] The blue PWR LED will turn on immediately. The red CLIP LEDs may trigger for 1-2 seconds until the amp has completed its turn-on cycle. If no lights come on, check the power cord and the AC reset on the rear panel. The GX and GX5 power ratings are shown in the Specifications page. 4 COOLING VENTS EN The internal fan draws air in from the left side, and exhausts on the right side. The fan speeds up in response to heavy use. DIMENSIONS Inches (cm) 17. 0 (43. 2) 10. 1 (25. 7) 9. 0 (22. 9) 19. 0 (48. 3) 3. 5 (8. 9) 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 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. Use only heavy duty speaker cables. SPEAKON CABLES (2 wire type): Insert and turn until the connector clicks. Use the thumb latch or locking ring to release the plug. SYSTEM HOOKUP EXAMPLES INPUT CONNECTIONS XLR 8 SPEAKER CONNECTIONS 8 OR 4 OHM MIXER SIGNAL LEVEL SOURCE SPEAKON SET TO FULL RANGE ¼ EN MIXER SIGNAL LEVEL SOURCE ¼ SET TO FULL RANGE PHONO WIRE MIXER SIGNAL LEVEL SOURCE BANANA JACKS SET TO FULL RANGE CONNECTION MULTIPLE SPEAKERS To connect two speakers to one amplifier channel, connect one speaker with Speakon or 1/4 ­inch jack, and connect the other speaker with a banana plug or wires to the binding posts. It is also possible to use banana plug for one speaker, and binding post wires for the other speaker. One 4-OHM speaker, or two 8-OHMspeakers, may be connected to each channel. If speakers have pass through jacks, do not put more than two in a chain. 8 OHM 8 OHM 8 OHM 8 OHM Second speaker Speakon and wires to the binding posts. First speaker 8 OHM 4 OHM 8 OHM 4 OHM Second speaker 1/4 ­inch jack, And wires to the binding posts. First speaker 4 OHM 4 OHM 4 OHM 4 OHM Second speaker First speaker banana plug and binding post SYSTEM HOOKUP EXAMPLES SUBWOOFER AND TOP BOX Move the CROSSOVER switch to the CROSSOVER position. Connect a single source, into the Ch 1 input. Connect a subwoofer to the Ch 1 output and connect a 2-way to box to the Ch 2 output. 8 OR 4 OHM INPUT SET TO CROSSOVER TOP 8 OR 4 OHM SUB 8 OHM POWERING HOUSE AND MONITOR SPEAKERS Set the CROSSOVER switch to the FULL RANGE position. Use a mixer with Main and Monitor outputs. Connect cables into Ch 1 and 2 respectively. Connect Ch 1 output to two large speakers. Connect Ch 2 output to two floor wedges. MAIN 8 OHM MAIN EN SET TO FULL RANGE STEREO PLAYBACK Set the CROSSOVER switch in the FULL RANGE position. Connect a Left / Right signal source to channel 1 and channel 2 respectively using XLR, TRS or PHONO connectors. [. . . ] Set on FULL RANGE for normal, independent use of each channel. CHANNEL INPUT SEEMS DEAD. The amp mutes briefly when turned on and off to prevent thumps. If the amp overheats severely, it will mute until it cools off. The fan will be running at full speed, and sound should resume in less than a minute. If the amp feels hot and the fan is not running, it needs to be serviced. Check the position of the CROSSOVER switch on the rear panel. [. . . ]