M Series Power Amplifiers

6 Troubleshooting

CONDITION: Power indicator is off.

POSSIBLE REASON

• The amplifier has lost AC power.

• The amplifier’s Power switch is off.

• The amplifier’s power cord is not plugged in at either end.

CONDITION: Distorted sound.

POSSIBLE REASON:

Load is wired incorrectly or Stereo/Mono mode switch is set incorrectly. Check both.

Input signal level is too high. Turn down your amplifier level controls, or turn down the input signal, until the clip LED goes out.

The amplifier’s circuit breaker has tripped. Allow the amplifier to cool; remove excessive loads, and press the reset switch on the front panel.

CONDITION: No input signal (Signal indicator is not flashing even though audio is applied).

POSSIBLE REASON:

Input signal level is very low.

Master audio from mixer turned down.

Input cable broken or not plugged in.

CONDITION: Fault indicator is flashing.

POSSIBLE REASON:

The amplifier has just been turned on and is still in the 4-second turn-on delay.

The heatsinks are too hot.

The transformer thermal protection is activated.

The amplifier output wires have devel- oped a short circuit.

The amplifier output stage has stopped operating. Refer the unit to an authorized Crown Service Center.

The fault status of the amplifier can also be monitored remotely by attaching a signal device to the Fault jack located on the ampli- fier back panel. See the Advanced Features and Options section for more detail.

Note: If sound is distorted but clip LED is not flash- ing, check mixer levels and gain staging, mixer clip lights, and pads built into microphones.

CONDITION: Input signal but no sound.

POSSIBLE REASON:

Speakers not connected. Make sure the Neutrik NL4 connector is fully seated and locked.

The amplifier output level is so high that the breaker has tripped. Try to identify and correct the problem before resetting the breakers. If the problem persists, refer the unit to an authorized Crown Service Center.

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Operation Manual

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Crown Audio M Series operation manual Troubleshooting, Condition Power indicator is off

M Series specifications

Crown Audio's M Series amplifiers are a renowned collection in the realm of professional audio equipment, recognized for their reliability, performance, and innovation. Designed specifically for commercial installations, the M Series provides powerful amplification with exceptional audio quality, making it a prime choice for venues such as auditoriums, churches, and theaters.

One of the standout features of the M Series is its high-efficiency Class D topology. This design not only reduces power consumption but also minimizes heat generation, which is crucial for long-term reliability and performance in demanding environments. The amplifiers are capable of delivering high output power while maintaining low distortion, ensuring that the audio experience remains clear and robust, even at high volumes.

The M Series amplifiers are equipped with a range of power options, ensuring that users can find a model that suits their specific needs. The lineup typically includes models ranging from 2-channel to 4-channel configurations, with power ratings suitable for various applications. This versatility allows for flexible setups, whether powering large PA systems or smaller setups for more intimate settings.

Integration with control systems is effortless, thanks to the M Series’ comprehensive connectivity options. The amplifiers feature XLR and TRS inputs, allowing for seamless integration with a wide array of audio sources. Their ability to be controlled remotely allows for convenient adjustments during live events or installations, further enhancing their usability.

The built-in DSP (Digital Signal Processing) is another critical highlight of the M Series. This technology provides users with significant control over the audio signal, enabling adjustments such as equalization, limiting, and crossover settings to fine-tune the sound output to perfection. The advanced protection circuitry ensures that the amplifiers remain safe from overheating and signal overloads, thus extending their lifespan and reliability.

Robust construction is a signature characteristic of the M Series, designed to withstand the rigors of professional use. The amplifiers feature a rugged chassis that can endure the demands of touring or permanent installations. Additionally, the fan-cooled design aids in maintaining optimal operating temperatures, ensuring performance consistency even during extended periods of use.

In conclusion, Crown Audio's M Series amplifiers combine power, efficiency, and cutting-edge technology to create an exceptional solution for professional audio applications. Whether used in concert halls, clubs, or corporate environments, the M Series continues to set a high standard for reliability and performance in the world of audio amplification.