Crown Audio S Series operation manual Advanced Features Options

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S-SeriesPower 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

S-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 S-Series amplifiers have a controlled slew rate to put a frequency limit on the highest frequencies that they repro- duce. This limit occurs well above 20 kHz, so there is no audible effect on performance.

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:

Operation Manual

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Contents Some models may be exported under the name Amcron SeriesImportant Safety Instructions Series amplifiers require Class 2 output wiringUse only with a cart, stand, tripod, bracket, or Safety Standard Crown International, IncFamily Name S-Series Model Names S-2,S-3 EMC Standards Table 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 ModeConnect to AC Mains Input Sensitivity SwitchSensitivity Switch Startup ProcedureOperation PrecautionsControls, Indicators and Connectors Clip Indicators Front Panel Controls Indicators Power SwitchReset Switch Fault IndicatorsAdvanced Features Options SST-4622 SST-3632SST-4632 Location 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 supplySeries Amplifier Block Condition Power indicator is off Troubleshooting120 VAC, 60 Hz Units, Bridge mono mode SpecificationsService Worldwide Except USA & Canada WarrantyThis page intentionally left blank SeriesPower Amplifiers Crown Audio Factory Service Information

S Series specifications

Crown Audio's S Series amplifiers are renowned in the professional audio industry for their excellent sound quality, reliability, and advanced technology. Designed to meet the needs of both touring and installation applications, the S Series has gained a reputation for delivering powerful performance and exceptional value.

At the heart of the S Series is Crown's patented DriveCore technology, which integrates the power amplifier's drive and output stage into a single chip. This innovation reduces the size and weight of the amplifier while improving efficiency and thermal performance. As a result, users can expect less heat generation and the ability to drive loads with ease, ultimately leading to longer operational life and reduced energy costs.

One of the standout features of the S Series is its output power options, which offer a range of configurations to suit various applications. The amplifiers provide up to 6000 watts, ensuring that they can handle large-scale events and venues with demanding audio needs. The S Series also includes advanced signal processing capabilities, including EQ and limiting, allowing users to further refine their sound.

The S Series amplifiers are built with durability in mind. They feature rugged construction, including a steel chassis and highly-efficient internal components, making them suitable for both touring environments and permanent installations. Additionally, the amplifiers are designed for ease of use, with an intuitive front panel interface that includes LED indicators for power, signal, and thermal status.

Connectivity is another strength of the S Series. The amplifiers offer a variety of input and output options, ensuring compatibility with different audio sources and speaker systems. The built-in network capabilities allow for remote monitoring and control via Crown’s Software, enhancing flexibility and convenience in live sound scenarios or fixed installations.

The S Series amplifiers also boast a high signal-to-noise ratio and low total harmonic distortion, ensuring pristine audio reproduction. This is crucial for professional sound systems, where clarity and fidelity are paramount for delivering an exceptional listener experience.

Overall, Crown Audio's S Series amplifiers combine state-of-the-art technology, robust performance, and user-friendly features, making them a preferred choice among audio professionals worldwide. Whether for a concert, theater, or nightclub, the S Series delivers the power and reliability needed to ensure outstanding sound quality every time.
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