Crown Audio CE Series operation manual Advanced Features Options

Page 15

CE Series Power Amplifiers

4 Advanced Features

and Options

NOTE: For detailed information about these Crown amplifier features, please consult the Crown Amplifier Application Guide, available on the Crown website at www.crownaudio.com.

4.1 Protection Systems

CE Series amplifiers are protected against shorted, open or mismatched loads; over- loaded power supplies; excessive temperature; chain destruction phenomena; input overload damage; and high-frequency blowups. They also protect loudspeakers from input/output DC, large or dangerous DC offsets and turn-on/ turn-off transients.

4.1.1 Bias Servo

Bias servo translates the output heatsink tem- perature to controlled bias current. This pre- vents thermal runaway and holds the amplifier’s notch distortion to a minimum.

4.1.2 Fault

The amplifier will light the Fault LED on the front panel if the amplifier output stage stops operating. If this happens, take the unit to an authorized Crown Service Center.

4.1.3 Ultrasonic and Radio Fre- quency Protection

An amplifier's slew rate only needs to be large enough to deliver the maximum voltage at the highest required frequency. Higher slew rates actually let the amplifier reproduce undesirable frequencies. By design, the CE Series amplifi- ers have a controlled slew rate to put a fre- quency limit on the highest frequencies that they reproduce. This limit occurs well above 20 kHz, so there is no audible effect on perfor- mance.

This approach protects the amplifier from radio frequencies and can even protect some sensi- tive loads (including some tweeters).

4.1.4 Drive Protection

This system temporarily removes output drive to protect the amplifier and its loads. Drive pro-

tection can be activated in two situations. First, if dangerous subsonic frequencies or direct current (DC) is detected in the amplifier's out- put, drive protection will activate. The amplifier resumes normal operation when it no longer detects dangerous output. Activating this pro- tection is very unlikely, but improper source signals like infrasonic square waves or a severely clipped input signal can activate this system.

Second, the amplifier's fault protection system puts the affected channel into drive protection mode in rare situations where heavy common- mode current is detected in its output. The amplifier should never output heavy common- mode current unless its circuitry is damaged. Activating drive protection helps prevent further damage.

4.1.5 Compression

A full-time compressor is in-line with the sig- nal, reducing the risk of damage to your speak- ers.

4.1.6 Power Circuit Breaker

A front panel push button is used to reset the circuit breaker that protects the power supply.

4.1.7 Proportional-speed Fan

The speed of the cooling fan is controlled by the transformer temperature and the heatsink temperature.

4.2 Advanced Features

4.2.1 Crown SST Modules

Crown optional SST (System Solution Topolo- gies) modules were specially designed to improve the fidelity and versatility of your audio system. They feature a variety of professional signal routing and filtering capabilities, with active crossovers that allow the audio signal to be split and sent to auxiliary amplifiers. Your amplifier may have come with an SST module already factory-installed, or your choice of SST modules can be easily added to the amplifier by any authorized Crown Service Center.

For information on wiring and configuration of amplifiers equipped with an optional Crown SST crossover module, please refer to the SST Crossover Reference Manual included in your literature package.

Refer to the following descriptions for an over- view of available Crown SST crossover mod- ules. Crown plans to release additional accessory plug-in modules offering a range of advanced features and capabilities. Watch for new releases:

SST-MX Crossover

Features include:

•Stereo biamp.

•100-Hz fixed crossover with 24-dB/octave Linkwitz-Riley tuned filters.

•Neutrik® Combo 1/4-inch (6.35-mm) and XLR input jacks.

•Barrier block balanced outputs.

•Optional high-pass filter bypass on ampli- fied outputs adapts system for full-range use.

SST-SX Crossover

Features include:

Mono-summed sub-bass output for biamp operation of subs.

•24-dB/octave Linkwitz-Riley tuned filters.

•Crossover switchable between 80 and 120 Hz.

•Neutrik® Combo 1/4-inch (6.35-mm) and XLR input jacks.

•Male 3-pin XLR outputs.

Optional high-pass filter bypass on amplified output adapts system for full-range use.

Operation Manual

page 15

Page 14 Page 16
Image 15
Page 14 Page 16
Contents Some models may be exported under the name Amcron CE SeriesUse only with a cart, stand, bracket, or table Important Safety InstructionsCE Series amplifiers require Class 2 output wiring Watch for These SymbolsCompetent Body’s Name and Address Safety StandardCrown International, Inc TCF Technical Certificate No C975CRI1.ABSTable of Contents Accurate, undistorted sound FeaturesHow to Use This Manual WelcomeSetup Unpack Your Amplifier Install Your AmplifierYou may also stack amps without using a cabinet Balanced Input Connector Wiring Choose Input Wire and ConnectorsNeutrik Speakon Connector Choose Output Wire and Con- nectorsWire Your System Stereo Mode How to Parallel the InputsSee the next page for Bridge-Mono wiring 11 Typical System Wiring, Bridge-Mono Mode Bridge-Mono ModeInput Sensitivity Switch Sensitivity SwitchStartup Procedure Operation PrecautionsControls, Indicators and Connectors Clip Indicators Front Panel Controls Indicators Power SwitchReset Switch Fault IndicatorsAdvanced Features Options SST-SBSC 4632T SST-SBSC-3632TLocation of Fault Jack Fault MonitoringTamper-Resistant Hole Plugs Options AccessoriesAlternate Output Connectors Optional 0.775 V Input Sensitivity SettingPrinciples of Operation Power LED is driven from the low-voltage supplyCE Series Amplifier Block Condition Power indicator is off Troubleshooting120 VAC, 60 Hz Units, Bridge mono mode SpecificationsService Warranty Worldwide Except USA & Canada Items Excluded from this CROWN- WarrantyThis page intentionally left blank Nature of Problem Crown Factory Service Information

CE Series specifications

Crown Audio’s CE Series amplifiers are designed to deliver high performance and reliability for a variety of applications, including live sound, commercial installations, and houses of worship. Renowned for their durability and efficiency, the CE Series combines advanced technology with user-friendly features to appeal to both professional audio engineers and casual users.

One of the standout characteristics of the CE Series is its robust construction. Built to withstand the rigors of live events and handling, these amplifiers are housed in a rugged chassis that ensures long-term durability. The fan cooling system is designed for efficient thermal management, keeping the amplifier cool even during extended use, which is crucial for maintaining optimal performance.

The CE Series boasts a range of power options, making it versatile for different setups. With models delivering from 1500W to over 4000W per channel, users can choose the appropriate amplifier to match their specific requirements. This flexibility allows the CE Series to support a wide array of speakers and systems, whether for small venues or large-scale arenas.

Crown utilizes innovative technologies in the CE Series amplifiers. One of the key features is the DSP (Digital Signal Processing), which enhances sound quality and allows for precise control over the audio output. The onboard DSP includes presets for various speaker configurations, EQ settings, and time alignment features, facilitating quick adjustments to achieve the desired sound quality.

Another notable feature is the built-in limiters, which protect both the amplifier and speakers from damage due to overload or clipping. This protection ensures reliability during high-pressure situations, such as concerts or events where audio levels can fluctuate dramatically.

Connectivity options in the CE Series are also comprehensive. The amplifiers come equipped with both analog and digital inputs, allowing compatibility with a wide range of audio sources. Additionally, the rear panel includes speakON® outputs for quick and secure speaker connections.

With its combination of power, reliability, and advanced technology, Crown Audio’s CE Series amplifiers stand out in the crowded field of professional audio equipment. These features make the CE Series an excellent choice for audio professionals seeking quality performance across various applications. Whether for a permanent installation or a touring setup, the CE Series amplifiers deliver the sound, durability, and versatility required by today’s audio engineers.
Top Page Image Contents