User Guide

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About the Alarm Log and Fault Indicator

The PowerMatch™ amplifier monitors operating temperature, power supply status, amplifier status, open and short wiring, and additional conditions for issues.

When issues are detected, information is stored in the amplifier in an internal log found by accessing MAIN MENU < UTILITY < Alarm Log from the front panel.

Information from the alarm log can also be viewed using ControlSpace® Designer™ software. In systems where ControlSpace Designer software is actively connected, either via USB or Ethernet, the time and date of the alarm condition is appended to the alarm log entry. Locally stored alarm information is sent to ControlSpace Designer software upon connection.

Critical internal system-related issues are always considered faults and will trigger the fault-notification output and the Fault LED on the front panel. However, you have the ability to select whether certain conditions are faults using ControlSpace Designer software. Refer to the ControlSpace Designer software documentation for details on how to view and manage alarms.

The table below lists the fault conditions that you can elect to use.

Figure 21. Fault Conditions

Fault Category

Captured Condition

Description

Potential Solution

 

 

 

 

Gain Reduction, Internal Protections

System-Related Issue

Internal issue was detected.

Power-off unit, check connections and airflow,

 

 

 

power-on unit and check.

 

 

 

 

Gain Reduction, Signal Limiting

Limiter Active

Limiter detected active for any output channel.

Could be normal operation; check input sensitivity

 

 

 

and gains and output channel limiter settings.

 

 

 

 

Output Fault

Open Circuit

An open circuit, output impedance is greater than

Check loudspeaker cabling or Output Mute unused

 

 

20 Ohms.

channels. Use low impedance loudspeakers when in

 

 

 

MONO output mode.

 

 

 

 

Input Fault

Input Clipping

Input signal found clipping.

Check and adjust input source, sensitivity settings,

 

 

 

and gain.

 

 

 

 

Input Fault

Loss of Digital Audio Source

Digital audio source expected, but digital audio

Check digital audio connections and source status.

 

 

source is not operational.

 

 

 

 

 

AC Power Fault

Loss of AC Power

AC Power below threshold. Set as default.

Check AC mains for voltage sag. Consider moving

 

 

 

to more stable circuit.

 

 

 

 

Page 38  User Guide

English

Page 38
Image 38
Bose PM8500N manual About the Alarm Log and Fault Indicator, Mono output mode, Gain, To more stable circuit

PM8500N, PM8500 specifications

The Bose PM8500 and PM8500N are high-performance amplifiers designed for professional audio applications. They are part of Bose's renowned line of amplification products that combine cutting-edge technology with user-friendly operation, making them ideal for venues like auditoriums, conference centers, and houses of worship.

One of the standout features of the PM8500 is its power output capabilities. The PM8500 delivers an impressive 850 watts per channel at 4 ohms, providing robust sound reproduction for large spaces. Its efficient Class D amplification ensures high performance with low distortion, allowing audio professionals to achieve crystal-clear sound even at high volume levels.

The PM8500N model enhances these features with advanced network control and monitoring capabilities. Integrated with Bose's proprietary AmpLink technology, the PM8500N allows for seamless integration within a digital audio network. This enables users to manage multiple units from a central location, making it easier to adjust settings, monitor performance, and troubleshoot potential issues in real-time.

Both models come equipped with a DSP (Digital Signal Processing) that includes various EQ presets and advanced audio tuning options. This feature allows users to optimize sound for specific environments or applications, ensuring the best audio experience possible. The built-in protection circuitry safeguards against overheating, short circuits, and overloading, ensuring reliable operation during demanding performances.

In terms of connectivity, the PM8500 and PM8500N models offer multiple input options, including balanced XLR and 1/4-inch TRS inputs, making them versatile for various audio sources. Additionally, they come with power-saving features, such as auto power down, further increasing their efficiency in energy consumption.

In summary, the Bose PM8500 and PM8500N amplifiers represent the pinnacle of professional audio amplification technology. With their powerful output, comprehensive connectivity options, advanced DSP features, and robust build quality, they are well-suited for any high-demand sound reinforcement application. Whether in a concert hall or a corporate setting, these amplifiers deliver reliable performance and superior sound quality, solidifying Bose's reputation as a leader in the audio industry.