QSC Audio 1100, 1400, 1700, 1200 Maintenance and Service, Cleaning, Dust Removal, User Maintenance

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V: MAINTENANCE AND SERVICE

5.1 CLEANING

The faceplate and chassis can be cleaned with a soft cloth and mild non-abrasive cleaning solution, such as Windex. Avoid cleaning powders or scrubbing pads, as these will scratch and dull the paint. Be sure to unplug the unit prior to cleaning. Do not apply liquid directly to the surface. Dampen the cloth with the cleaning solution and wipe gently. You may wish to buff the surface lightly with a dry soft cloth.

5.2 DUST REMOVAL

After prolonged use, especially in dusty environments, the heat sinks may become clogged with dust. This will interfere with cooling and lead to higher temperature operation and reduced life. Dust build-up can be most easily removed by brushing or directing an air jet between the fins of the heat sinks.

5.3 USER MAINTENANCE

There are no periodical “tune-up” adjustments required; the amplifier should provide stable performance until parts fail from age. Internal servicing must be referred to qualified personnel. The amplifier may be inspected for loose screws on the outside. If any loose parts rattle around on the inside when the amp is turned over in all directions, please have it serviced immediately, as a loose part could lodge in a dangerous place and cause further damage or shock hazard.

5.4 OBTAINING SERVICE

If the amplifier isn’t working properly, please consult the troubleshooting chart in Section 3.9. If proper operation cannot be restored, the amplifier may require service. This must be performed by qualified technical personnel, to avoid shock hazard or improper repairs. To obtain the location of the nearest authorized Service Center, please contact your QSC dealer or the QSC Service Department— 1-800-772-2834.

Please note that the Series One warranty does not cover repairs made by non-authorized service personnel, and that improper repairs may void future warranty coverage.

If the amplifier is returned to the factory for service, you must first obtain an R.A. number (“Return Authorization) from the QSC Service Department. The amplifier must be sent in the original type shipping carton. If you have not saved your carton, see if your dealer has one, or call the QSC Service Department to have an empty carton sent for shipping. The Series One warranty does not cover shipping damage caused by returning an amplifier in the wrong carton.

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Contents Owner’s Manual Safeguards PrecautionsB L E O F C O N T E N T S AvisWarranty and Disclaimers IntroductionWelcome Overview of AmplifierSpecifications Input Impedance Crosstalk Controls Indicators Cooling1100 1200 1400 1700 Frequency ResponseUnpacking and Inspection Important PrecautionsII Basic Instructions Quick Instructions Front View Back ViewIII Operation CoolingSee illustrations in .3 for location AC RequirementsInput Connections 34a 1/4-inch RTS Balanced Output Connection 36 1/4-inch Quasi-balanced Output Connection Octal Module Accessories Input Switches and Mono BridgingMono Bridge Precautions Speaker ConnectionsFactor Cable Power Loss Damping Length Gauge Resistance69 Speaker Wire Table Protection Features 73 70 Volt Output Power25 and 70 Volt Systems OutputOperational Troubleshooting No SoundUnwanted Noises IV Speaker Protection BackgroundDC Protection Horn Driver ProtectionPower Capacity Power LimitingRMS Power Ohm 16-ohm Load User ResponsibilityMaintenance and Service CleaningUser Maintenance Obtaining ServicePage D I O

1200, 1700, 1400, 1100 specifications

QSC Audio has long been a revered name in professional audio, and its series of amplifiers—including the QSC 1100, 1200, 1400, and 1700—continues to showcase the brand's commitment to quality, performance, and innovation. Each model is designed to meet the diverse needs of audio professionals, whether for live sound, installations, or studio use.

The QSC 1100 amplifier is renowned for its lightweight and compact design while delivering a solid 1100 watts of power. It features QSC's advanced Class D technology, which not only provides high efficiency but also significantly reduces heat generation. The 1100 includes comprehensive protection circuitry, ensuring safe operation in all situations. With a Frequency Response of 20 Hz to 20 kHz, the amplifier offers a balanced and clear sound profile, making it suitable for various applications.

Moving up the line, the QSC 1200 offers increased power output at 1200 watts and comes equipped with advanced DSP (Digital Signal Processing). The DSP allows users to tailor the audio output precisely, delivering optimized performance for any setting. In addition to its robust power, the 1200 features a versatile input section, supporting both XLR and 1/4" TRS connectors, providing flexibility for any audio source.

The QSC 1400 amplifier is a workhorse in the series, capable of producing up to 1400 watts, making it ideal for larger venues and events. This model is designed with enhanced thermal management, ensuring reliability even during extended use. The 1400’s high-frequency response capabilities further improve its adaptability, handling complex audio signals with ease.

Lastly, the QSC 1700 stands as the powerhouse of this lineup, delivering a remarkable 1700 watts of clean, distortion-free audio. It boasts an advanced cooling system, making it perfect for high-demand environments. The 1700 is also equipped with customizable limiter settings, allowing users to protect their speakers while maintaining sound integrity.

QSC’s commitment to durability is evident in all four amplifiers, featuring rugged chassis designs and high-quality components to withstand the rigors of professional use. Collectively, the QSC 1100, 1200, 1400, and 1700 amplifiers offer a compelling range of features that cater to various audio needs, all while ensuring superior sound quality and reliability, making them excellent choices for any sound engineer or venue manager.
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