QSC Audio Essential Guide to QSC 1700 Amplifier Protection and Setup
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AMPLIFIER PROTECTION

Full Short Circuit, Open Circuit, Over-Temp, Ultrasonic and

 

 

RF Protection. Stable into reactive or mismatched loads.

 

SPEAKER PROTECTION

DC Load Fault Protection

 

 

 

3 Second Turn-on, Instant-off Muting

 

 

COMPLEMENTARY OUTPUT DEVICES

4

8

16

32

POWER SUPPLY

Single Transformer with Independent Isolated Secondary Windings, Fault

 

Fuses, Rectifiers, and Filter Capacitors

 

 

DIMENSIONS

 

 

 

 

Faceplate Width

Standard 19" Rack Mounting

 

 

Faceplate Height

1.75"

5.25"

5.25"

7.0"

Chassis Depth

8.7"

9.5"

9.5"

11.75"

WEIGHT

 

 

 

 

Shipping, Lbs

15

28

37

57

Net, Lbs

12

24

34

55

II: BASIC INSTRUCTIONS

2.1 UNPACKING AND INSPECTION

All QSC Series One amplifiers are fully tested and inspected before they leave the factory. Despite the protective carton and rugged amplifier design, it is possible for shipping abuse to damage the amplifier. Check for obvious carton damage while unpacking the unit. After removing the amp from the box, rotate it in all directions to check for loose parts inside.

Please save the carton for return shipment, if required. QSC does not warranty against damage caused by sending amplifiers back in the wrong carton.

If shipping damage is evident, notify the transportation company immediately. Only the consignee can file a claim with the carrier for shipping damage. QSC will cooperate fully in such an event. Be sure to save the carton for the shipper to inspect.

2.2 IMPORTANT PRECAUTIONS

2.21The power must be OFF when making any connections. If you connect plugs with the power on, especially in dry environments, static sparks or bad cables can cause pops or hums which can damage speakers.

2.22When first powering up the amp, have the amplifier Gain controls all the way off, in case of defective cables or hookups. Turn the Gain controls up gradually until normal operation is verified.

2.23Check the AC voltage printed on the serial number label to ensure your amplifier is properly configured for the AC voltage supplied in your area before connecting the AC plug.

CONNECTION TO A VOLTAGE SOURCE OTHER THAN THE ONE SPECIFIED WILL IMMEDIATELY DAMAGE THE AMP, AND VOIDS THE WARRANTY.

2.24Never connect the speaker terminals (red binding posts) for two channels together on any power amplifier. The two channels will fight each other and possibly fail. Do not connect the speaker ground terminals (black binding posts) to chassis or signal grounds, as the resultant ground loop could cause ultrasonic oscillations. In other words, keep all speaker wiring separate for each channel, and separate from input wiring.

2.25Do not remove the amplifier cover, as there are dangerous voltages inside. Do not expose to rain or moisture. Refer all servicing to qualified personnel. The warranty will be void if the amp is tampered with by non-QSC repair centers or personnel.

2.26The QSC Warranty does not cover tampering by unqualified personnel, or repairs made at non-QSC repair centers. Please call the factory for Service Center information and locations.

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Contents Owner’s Manual Precautions SafeguardsB L E O F C O N T E N T S AvisIntroduction Warranty and DisclaimersWelcome Overview of AmplifierInput Impedance Crosstalk Controls Indicators Cooling Specifications1100 1200 1400 1700 Frequency ResponseUnpacking and Inspection Important PrecautionsII Basic Instructions Quick Instructions Back View Front ViewCooling III OperationSee illustrations in .3 for location AC RequirementsInput Connections 34a 1/4-inch RTS Balanced Output Connection 36 1/4-inch Quasi-balanced Output Connection Input Switches and Mono Bridging Octal Module AccessoriesSpeaker Connections Mono Bridge PrecautionsFactor Cable Power Loss Damping Length Gauge Resistance69 Speaker Wire Table 73 70 Volt Output Power Protection Features25 and 70 Volt Systems OutputNo Sound Operational TroubleshootingUnwanted Noises Background IV Speaker ProtectionDC Protection Horn Driver ProtectionPower Limiting Power CapacityRMS Power Ohm 16-ohm Load User ResponsibilityCleaning Maintenance and ServiceUser 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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