Important Safety Precautions & Explanation of Symbols

1- Read these instructions.

2- Keep these instructions.

3- Heed all warnings.

4- Follow all instructions.

5- WARNING: To prevent fire or electric shock, do not expose this equipment to rain or moisture. Do not use this apparatus near water.

6- Clean only with a dry cloth.

7- Do not block any ventilation openings.

8- Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. 9- Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding plug has two blades and a grounding prong. The wide blade or third prong are provided for your safety. If the provided plug does not fit your outlet, consult an electrician for the replacement of the obsolete outlet.

10- Protect the power cord from being walked on or pinched, particularly plugs, convenience receptacles, and the point where they exit from the apparatus.

11- Use only attachments/accessories specified by QSC Audio Products, Inc.

12- Use only with hardware, brackets, stands, and components sold with the apparatus or by QSC Audio Products, Inc.

13- Unplug the apparatus during lightning storms or when unused for long periods of time.

14- Refer all servicing to qualified service personnel. 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 main- tenance (servicing) instructions in this manual.

The lightning flashes printed next to the OUTPUT terminals of the amplifier are intended to alert the user to the risk of hazardous energy. Output connectors that could pose a risk are marked with the lightning flash. Do not touch output terminals while amplifier power is on. Make all connections with amplifier turned off.

The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsu- lated "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. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.

WARNING: To prevent fire or electric shock, do not expose this equipment to rain or moisture.

FCC INTERFERENCE STATEMENT

NOTE: This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and if not installed and used in accordance to the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by switching the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

•Reorient or relocate the receiving antenna.

•Increase the separation between the equipment and the receiver.

•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. •Consult the dealer or an experienced radio or TV technician for help.

© Copyright 2006, QSC Audio Products, Inc.

QSC® is a registered trademark of QSC Audio Products, Inc.

"QSC" and the QSC logo are registered with the U.S. Patent and Trademark Office

Speakon® is a registered trademark of Neutrik Inc. All trademarks are the property of their respective owners.

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QSC Audio PLX 1104 user manual Important Safety Precautions & Explanation of Symbols, FCC Interference Statement
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PLX 1104 specifications

The QSC Audio PLX 1104 is a versatile and powerful power amplifier designed to meet the demands of live sound applications, installations, and more. Renowned for its exceptional performance and reliable operation, the PLX 1104 has become a preferred choice for sound engineers and audio professionals alike.

One of the standout features of the PLX 1104 is its lightweight design. Weighing in at just 10.5 pounds, this amplifier is easy to transport and install, making it ideal for mobile applications. Its compact form factor allows for efficient use of space in equipment racks and allows for quick setups and takedowns during events.

The QSC PLX 1104 outputs an impressive 1,000 watts per channel at 8 ohms and 1,200 watts at 4 ohms, providing ample power for driving a wide range of loudspeakers. This capability makes it suitable for various applications, from small clubs to larger venues requiring robust sound reinforcement. The amplification system utilizes a high-efficiency design that significantly reduces power consumption and heat generation, enhancing reliability and longevity.

In terms of connectivity, the PLX 1104 features balanced XLR inputs and Neutrik Speakon outputs, ensuring compatibility with a broad array of sound systems. Its intuitive control layout, including a rear-mounted gain control for each channel, allows for easy dial-in of the desired output level.

The PLX 1104 employs QSC's advanced proprietary technology to deliver exceptional audio quality. This includes sophisticated output transistors and a high-frequency protection circuit, ensuring that the amplifier provides clean and undistorted sound, even at high output levels. Furthermore, the built-in thermal management system helps to prevent overheating, further increasing the reliability of the amplifier in demanding environments.

Additional features of the PLX 1104 include a switchable low-frequency filter that can help to improve the overall clarity of sound, particularly in live sound scenarios where low-end muddying can occur. The amplifier is also equipped with a front-panel LED status indicator that serves as a visual cue for the operational status of the unit.

In summary, the QSC Audio PLX 1104 is a testament to modern amplifier technology, combining lightweight portability with powerful performance and rich features. Its ability to deliver high-quality audio while being exceptionally user-friendly makes it a go-to solution for audio professionals who require both reliability and flexibility in diverse sound reinforcement situations.
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