LED Indicators

The LED indicators can be used to monitor system operation and identify common problems.

POWER (PWR): BLUE

Normal indication:

•AC switch ON: LED will illuminate; on some models, LED will illuminate dimly during startup sequence.

If no indication:

•Check AC power cord and AC outlet.

LED indicators on PLX 1104 and PLX 1804 models

•Confirm that AC switch is in ON position.

EN

CLIP: RED

Normal indication:

•Illuminates whenever the amplifier is driven beyond full power. The resulting distortion corre- sponds to the brightness of the LED. Distortion that causes only brief flashing may not be audi- ble.

•During muting, the red LED fully illuminates. This occurs during normal "On-Off" muting.

Abnormal indication:

•Bright red illumination while the amp is being used indicates either thermal muting or a shorted output.

•If the amplifier overheats, the fan will run at full speed, and operation should resume within one minute. Allow the fan to run, and make sure the amplifier ventilation is adequate.

•A shorted or overloaded output circuit will cause excessive Clip flashing and possible overheat- ing.

•If distortion is audible without a Clip indication, the problem is either before or after the ampli- fier. Check for damaged speakers or overloaded signal source. The amplifier Gain control should be in the upper half of its range to prevent input overload.

SIGNAL (SIG), -10: GREEN

Normal indication:

•The SIG (signal) indicator illuminates when the output signal exceeds -35 dB, and the -10 (-10 dB) indicator illuminates when the signal exceeds -10 dB.

If no indication:

•Check Gain settings and increase gain if necessary. Check input connections and audio source for signal. If the Clip LED illuminates with little or no Signal indication, check the output wiring for shorts.

Abnormal indication:

•If the SIG or -10 LED illuminates with no signal input, there may be system oscillations or some other malfunction. Disconnect the load and fully reduce the gain. If the LED remains on, the amp may need servicing.

BRIDGE MONO (BR M) and PARALLEL (PAR) (PLX 1802/2502/3102/3602 models only):

•Each channel pair has a AMBER LED for Bridge Mode, and a AMBER LED for Parallel mode. These show how the rear panel INPUT CONFIGURATION switch is set (see Input Configuration Switch). In Stereo mode, both LEDs should be OFF. In bridge mode the BR M and PAR indicator will be illuminated. In parallel mode, the PAR indicator will be illuminated.

LED indicators on PLX 1802, PLX 2502, PLX 3102, and PLX 3602 models

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QSC Audio PLX3602, PLX1804, PLX2502, PLX1802, PLX3102 LED Indicators, Power PWR Blue, Clip RED, Signal SIG, -10 Green
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PLX1802, PLX3102, PLX3602, PLX1804, PLX2502 specifications

QSC Audio has long been recognized in the professional audio industry for its commitment to high-quality amplification solutions. The PLX series, which includes models such as PLX2502, PLX1804, PLX3602, PLX3102, and PLX1802, showcases the brand's innovative technologies and robust design philosophy, catering to a wide array of applications ranging from live sound to installation.

The PLX2502 serves as a powerful amplifier capable of delivering 2,500 watts at 4 ohms. Its lightweight construction makes it easy to transport, while the efficient PowerLight™ technology helps reduce energy consumption without compromising performance. This model features dual independent channels, allowing for versatile operation and flexibility in wiring configurations.

The PLX1804, on the other hand, offers slightly lower output while still delivering a solid 1,800 watts at 4 ohms. This model combines superior sound quality with a user-friendly interface. The specially designed fan cooling system ensures that the amplifier remains efficient even during demanding performance conditions. It also comes equipped with XLR and TRS inputs, providing compatibility with a wide range of audio sources.

For those requiring even more power, the PLX3602 stands out with a massive 3,600 watts at 4 ohms. Its all-steel chassis enhances durability, making it suitable for rigorous touring environments. Additionally, the integrated DSP offers protection against overheating, short-circuits, and overloads. With its extensive range of outputs, the PLX3602 supports complex setups involving multiple speakers and driving high-demand audio systems.

The PLX3102 is another noteworthy model in the series, providing an output of 3,100 watts. This amplifier emphasizes versatility and can drive various speaker configurations efficiently. It features both binding post and Speakon outputs, ensuring secure and reliable connections, even in high-stress scenarios.

Lastly, the PLX1802 rounds out the series with 1,800 watts of power. Known for its compact size, it is particularly suited for smaller venues or as a monitor amplifier. Despite its smaller footprint, the PLX1802 retains the robust performance characteristics that QSC is known for.

Overall, the PLX series epitomizes QSC’s dedication to quality audio amplification, combining power, portability, and advanced features across an impressive range of models. With their advanced technologies, including PowerLight™ and integrated DSP, these amplifiers are designed to meet the rigorous demands of both live and installed sound applications while delivering exceptional sound quality.
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