User manual QSC AUDIO GX REV A

[. . . ] REFER SERVICING TO QUALIFIED PERSONNEL. ! WARNING: To prevent fire or electric shock, do not expose this equipment to rain or moisture. © Copyright 2007, QSC Audio Products, Inc. Patent and Trademark Office All trademarks are the property of Speakon® and PowerCon® are registered trademarks of Neutrik Inc. their respective owners. GX POWER AMPLIFIER SERIES Professional Power Amplifiers 3 WELCOME Thank you for purchasing a QSC Audio amplifier. The GX Series is the latest in a long line of hard-working, low cost amplifiers, designed to produce the best possible results for a wide range of users. [. . . ] Visit frequently for new announcements, typical questions, and other user information. IMPORTANT SAFETY PRECAUTIONS QSC products are designed for safe operation, and have been certified by recognized product safety agencies to meet all normal standards for this type of product. However, dangerous voltages and power levels exist within the covers of this amplifier. If the product has been dropped, dented, soaked, or appears to have loose parts inside, the risk of shock is increased. Unplug the AC cord, and take the product to qualified service personnel for inspection and repairs. POWER RATINGS Model GX GX5 8 ohms 300 500 Watts at 0. 1% clipping, both channels driven 4 ohms 45 700 ohms* 00 350 *NOTE: 2-ohm loading is not recommended for high power use. To avoid protective limiting, use only at low levels. FRONT PANEL FEATURES MODEL NUMBER ON-OFF SWITCH Move the rocker switch up to turn on the amplifier. 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. 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. 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. Connect a speaker to each channel using SPEAKON, ¼' PHONE, BANANA JACKS or WIRE. OR 4 OR 8 OHM 4 OR 8 OHM L SET TO FULL RANGE R Move the CROSSOVER switch to the FULL RANGE position. DO NOT connect both channels Into the same speaker. USING BOTH CHANNELS FOR THE SAME 4 OR 8 OHM L1 4 OR 8 OHM L2 FULL RANGE SET TO FULL RANGE DO NOT connect both Channels to the same speaker. RTS jumper between CH1 and CH TROUBLESHOOTING NO POWER, NO LIGHTS, NO FAN Confirm that the AC cord is fully seated and connected to a live outlet. Check the BREAKER on the back of the amplifier by pushing in the button. If the breaker trips off quickly, the amplifier needs servicing. 10 NO SOUND, WITH BLUE LED ONLY, NO GREEN OR RED LED Confirm that the Gain controls are turned up. If necessary, try another source, or connect another amplifier to the existing source. The green LED indicates the amp is producing a signal, so sound should be heard if the speaker is connected. Check the speaker connections at both ends, and try a different speaker. AMPLIFIER LOSES VOLUME EN If the amplifier is worked too hard, GuardRailTM will reduce volume to prevent thermal muting. [. . . ] (3) Full power is breaker limited to short periods. (2) 1/3 power represents peak program levels. For 100V, multiply AC current by 1. 25. WARRANTY (USA only; other countries, see your dealer or distributor) Disclaimer QSC Audio Products, Inc. is not liable for any damage to amplifiers or any other equipment that is caused by negligence or improper installation and/or use of this loudspeaker product. ( QSC ) guarantees its products to be free from defective material and / or workmanship for a period of three (3) years from date of sale, and will replace defective parts and repair malfunctioning products under this warranty when the defect occurs under normal installation and use - provided the unit is returned to our factory or one of our authorized service stations via prepaid transportation with a copy of proof of purchase (i. e. , sales receipt). [. . . ]