User manual QSC AUDIO GX3 REV A

[. . . ] 14- Unplug the apparatus during lightning storms or when unused for long periods of time. Servicing is required when the apparatus has been damaged in any way, such as power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in this manual. The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated "dangerous" voltage within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to humans. CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE COVER. [. . . ] Heavy overdrive triggers internal gain reduction, to reduce overload distortion. 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). REAR PANEL FEATURES CROSSOVER SWITCH CROSSOVER POSITION Splits a full-range signal to drive a subwoofer and top box. Use the two Gain controls to balance the LF and HF signals (see Front Panel). 6 EXHAUST VENT Keep vent clear. Install in open-back rack. EN FULL RANGE POSITION For normal, 2-channel use with all inputs active. The crossover is bypassed. REAR EAR MOUNTING Rear ears designed for protecting the rear connector wire dressing and supporting the amplifier in a rack. A rear rack support mounting kit (model FG000031-00 pack of two) is available from QSC Technical Services Group. INPUT CONNECTIONS BALANCED XLR INPUTS Pin 2 Positive, Pin 3 Negative, Pin 1 Shield (Ground). Recommended for long or short runs, either fixed or frequently changed. Each channel's XLR and TRS jacks are connected internally, and provide feed thru to the other connector. BALANCED 1/4-INCH TRS INPUTS Tip positive, Ring Negative, Sleeve Shield (Ground). UNBALANCED 1/4-INCH TS INPUTS Accepts unbalanced 1/4-inch plugs for short runs. Tip positive, Sleeve Shield (Ground). UNBALANCED PHONO INPUTS Tip Positive, Barrel Shield (Ground). Recommended for semi-permanent connections to nearby sources, within the same rack. NOTE: when using these inputs, the TRS or XLR inputs should not be used. 7 AC BREAKER RESET If the amplifier shuts off after a long burst of power, turn off the AC switch and check the circuit breaker. If the breaker trips repeatedly, the amplifier may need servicing. SERIAL NUMBER AND RATINGS The rated AC voltage and output power is shown on the serial number plate. Record the serial number in a safe place. EN AC INLET SPEAKER CONNECTIONS BINDING POSTS Accepts banana plugs (not permitted in CE regions). 1/4-INCH CONNECTORS Insert plug into the center of the Speakon-Combo jack. 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. [. . . ] This warranty provides that the examination of the return product must indicate, in our judgment, a manufacturing defect. This warranty does not extend to any product which has been subjected to misuse, neglect, accident, improper installation, or where the date code has been removed or defaced. This limited warranty is freely transferable during the term of the warranty period. In the event that this product was manufactured for export and sale outside of the United States or its territories, then this limited warranty shall not apply. [. . . ]