QSC 1100 Owner's Manual

Also see for 1100: Specifications Specifications Technical & service manual

Contents

QSC 1100 Owner's Manual Manual pdf 4 page image

4automatically as soon as safe operation is assured. An equally important muting circuit protects the loudspeakers fromunexpected damage, by muting the amp during turn-on and turn-off and by blocking DC faults, whether caused by theamplifier or preceding components.The front panel presents essential user information and is recessed to prevent damage. The green power indicator servesas a pilot light and individual red clip indicators monitor overall performance of each channel. The AC switch and circuitbreaker are front mounted for convenience and quick resetting. Except for the Model 1100, the Gain controls and inputprogramming switches have been placed on the back of the amplifier to protect them from damage, inadvertent adjustment,or tampering. The Gain controls, as well as a pair of headphone jacks, have been placed on the front panel of the Model1100 to allow easy access in monitoring applications.The amplifiers use a separate bipolar power supply for each channel, for minimum crosstalk, cross-distortion, and greaterreliability. A single dual-secondary transformer feeds isolated, separately fused rectifiers and filter capacitors for eachchannel. Thus the remaining channel can keep running in case of breakdown.In order to interface properly with a variety of pro-audio systems, we have included all of the popular input and speakerconnectors. Balanced or unbalanced inputs can be made using XLR plugs, screw lugs to the barrier strip, or 1/4-inch phoneplugs (ring-tip-sleeve for balanced inputs). Speaker connections are made with 5-way binding posts.The steel chassis, of the 1200, 1400 and 1700, is a 14 gauge, single piece design with integral rack mounting ears. The1100 chassis features single piece aluminum extrusions that form the sides of the chassis and feature integral rackmounting ears and heatsinks. The extra strength chassis and rugged mounting of internal parts contributes greatly toQSC’s reputation for reliability by protecting the circuitry from years of road abuse.All of these points are more fully explained in the following Sections.1.4 SPECIFICATIONS1100 1200 1400 1700OUTPUT POWER (per channel)Both Channels Driven8 ohms, 20-20 kHz, 0.1% THD 50w 100w 200w 325w4 ohms, 20-20 kHz, 0.1% THD 70w 150w 300w 500wBridged-Mono Operation8 ohms, 20-20 kHz, 0.1% THD 140w 300w 600w 1000wDYNAMIC HEADROOM dB8 ohms 2.0 2.0 2.0 1.94 ohms 2.3 2.5 2.5 2.9DISTORTION, THD @ 8 ohms20-20 kHz, at rated power Less than 0.1%, 0.01% typicalSMPTE-IM at rated power Less than 0.025%FREQUENCY RESPONSE 20-20 kHz, +0, -1.0 dB at 1 wattDAMPING FACTOR @ 8 ohms Greater than 200NOISE (A-weighted) 100 dB below rated powerVOLTAGE GAIN, dB 26 29 32 34SENSITIVITY, V RMS 1.0 1.0 1.0 1.0(for rated power, 8-ohms)INPUT IMPEDANCE 10K unbalanced inverting20K balanced or unbalanced non invertingCROSSTALK -70dB, 20-20 kHzCONTROLS AC Switch, Circuit Breaker, Gain Knobs, Input Programming DIP Switches,and Bridging SwitchINDICATORS Power: Green LED Clip: Red LEDCOOLING Convection Convection 2 speed fan 2 speed fan