Crown Audio M Series Front Panel Controls Indicators Power Switch, Reset Switch, Power Indicator

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M Series Power Amplifiers

3 Operation

3.2 Front Panel Controls

and Indicators

A. Power Switch

Switch turns the amplifier on (“ ”) or off (“ 0 ”).

B. Reset Switch

This front-panel pushbutton is used to reset the circuit breaker that protects the power supply.

C. Power Indicator

Green LED indicates amplifier has been turned on and AC power is available.

D. Signal, Clip and Fault Indicators

Signal: A green LED for each channel flashes when a low-level signal (40 dBm) is present at the input.

Clip: A red LED for each channel turns on when distortion becomes audible in the amplifier output.

Fault: Normally off, this red indicator will blink under fault conditions. See Section 6, Troubleshooting.

E. Level Controls: Detented rotary level control for each channel.

3.3Back Panel Controls and Connectors

F. Barrier Block Inputs: May be wired bal- anced or unbalanced.

G.Neutrik® Combo Inputs: 1/4-inch phone and XLR inputs. May be wired bal- anced or unbalanced.

H.5-way Binding Post Outputs: One pair per channel; accept banana plugs, spade lugs or bare wire. Note: Binding post outputs on European models come with safety plugs installed to prevent European power-cord plugs from being inserted. The side entry positions for these connectors should therefore be used with European models.

I. IEC Power Connector

J. Fault Output: RJ11 jack allows monitoring of the amplifier’s Fault status from a remote location. See Section 4.2.

K.Stereo/Bridge-Mono Switch: Two-posi- tion switch selects either Stereo or Bridge- Mono operation.

L.Input Sensitivity Switch: Two-position switch selects either 1.4 V sensitivity or 26 dB gain.

M.Neutrik ®Speakon® Outputs: Two Neu- trik Speakon NL3MP output connectors (mates with NL4FC). See Figure 2.5 and Table 1 for connector wiring.

Operation Manual

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Contents Some models may be exported under the name Amcron M240Importantes Instructions de Sécurité Important Safety InstructionsDeclaration of Conformity Safety StandardCrown International, Inc European Representatives Name and AddressTable of Contents How to Use This Manual FeaturesWelcome Install Your Amplifier SetupUnpack Your Amplifier Ensure Proper CoolingChoose Output Wire and Connectors Choose Input Wire and ConnectorsDistance How to Parallel the Inputs in Stereo Mode Wire Your System Stereo ModeTypical input and output wiring is shown Bridge-Mono ModeSet the Mode Switch to Bridge Inputs Use only the Channel-1 input connec- torConnect to AC Mains Startup ProcedureOperation PrecautionsCh-2 Level Control Ch-1 Level ControlReset Switch Front Panel Controls Indicators Power SwitchPower Indicator Signal, Clip and Fault IndicatorsCrown SST Modules Fault MonitoringOptional Barrier Block Outputs Optional 0.775-V Input Sensi- tivity SettingTamper-Resistant Hole Plugs Series Amplifier Principles of OperationNeutrik Speakon connector. Both Channel Condition Power indicator is off TroubleshootingKHz with 0.5% THD SpecificationsCommon Mode Rejection CMR20 Hz to 1 kHz Crosstalk below rated power, 20 Hz to 20 kHzVoltage Gain at maximum level setting Ventilation Cooling Dimensions Weight Net ShippingService 12/01 WarrantyWorldwide Except USA & Canada This page Intentionally Left Blank Crown Audio Factory Service Information Series Power Amplifiers Series Power Amplifiers

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.