
CH and CL 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
CH and CL Series amplifiers are protected against shorted, open or mismatched loads; overloaded power supplies; excessive temperature, chain destruction phenomena, input overload damage and
4.1.1 Power Circuit Breaker
A
4.1.2 Proportional-speed or 3-speed Fan
In the CH1, CH2, CL1 and CL2, a proportional- speed fan directs the airflow through the amplifier for cooling. In the CH4 and CL4, a
4.2 Advanced Features
4.2.1 BCA® (CH4 and CL4 Only)
BCA (Balanced Current Amplifier) is Crown’s pat- ented,
While switching designs have been used success- fully in other applications, these designs were never before suitable for use in precision,
With their superior efficiency, BCA amplifiers can help to keep power requirements lower, while still providing excellent audio reproduction. And Crown BCA amplifiers are
4.2.2Switching Power Supply with PFC (CH4 and CL4 Only)
Crown’s new Switching Power Supply with PFC provides a range of benefits over both
Typical
By contrast, switching power supplies can operate with a much smaller (and lighter) transformer because they first convert the AC up to a much higher frequency, thereby reducing waste.
4.3 Options
4.3.1 Input Sensitivity
Input Sensitivity is factory set to1.4V for each chan- nel. With this setting, a 1.4V input signal will drive the amplifier to full power into an
4.3.2 Crown SST Modules
Crown optional SST (System Solution Topologies) 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 auxil- iary amplifiers. Your amplifier may have come with an SST module already
For information on wiring and configuration of amplifiers equipped with an optional Crown SST crossover module, please refer to the SST Cross- over Reference Manual included in your literature package.
Refer to the following descriptions for an overview of available Crown SST crossover modules. Crown plans to release additional accessory
Operation Manual | page 19 |