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General| Brand | Crown |
|---|---|
| Category | Amplifier |
| Channels | 2 |
| Series | Contractor |
| Signal to Noise Ratio | >100dB |
| Power Output | See 8 Ohm Stereo, 4 Ohm Stereo, 8 Ohm Bridged-Mono |
| Frequency Response | 20Hz - 20kHz |
| Input Impedance | 20k Ohms |
Avoid using the apparatus near water sources to prevent damage or shock.
Clean the apparatus exclusively with a dry cloth.
Ensure ventilation openings are not blocked during installation and operation.
Avoid installing the apparatus near heat-producing sources like radiators or stoves.
Do not alter or defeat the safety purpose of polarized or grounding-type plugs.
Protect the power cord from being walked on or pinched, especially at connection points.
Use only manufacturer-specified attachments and accessories for safety and performance.
Use only manufacturer-specified carts, stands, brackets, or tables; exercise caution when moving.
Unplug the apparatus during lightning storms or extended periods of non-use.
All servicing must be performed by qualified service personnel to ensure safety.
Do not expose the apparatus to rain or moisture to reduce fire and electric shock risk.
Overview of the three-year, no-fault, full warranty coverage for Crown products.
Details items and conditions not covered by the Crown product warranty.
Procedure for notifying Crown and obtaining warranty service for defective products.
Disclaimer regarding consequential and incidental damages resulting from product defects.
Instructions for unpacking, inspecting for transit damage, and saving packing materials.
Highlights the designed features for fixed installation, including impedance compatibility and SST system.
Describes the front panel layout including power, signal, clip, and fault indicators.
Details rear panel connections and controls for CH, CL series amplifiers.
Provides instructions for rack mounting Contractor Series amplifiers and considerations for airflow and support.
Explains wiring options based on output mode (4/8 ohm, 70V/100V) and stereo/bridge modes.
Essential safety and operational precautions to follow before and during amplifier use.
Step-by-step guide for safely turning on and setting up the amplifier for initial use.
Explanation of the function and meaning of the amplifier's front panel indicators (Power, Fault, Clip, Signal).
Details on the Enable switch, Precision Detented Level Controls, Stereo/Bridge switch, and Fault Jack.
Explains the benefits of BCA technology for high-power audio amplification.
Describes the PFC boost stage for global AC compatibility and power efficiency.
Overview of SST modules for tailoring amplifier functionality and adding future technology.
Details on the Fault (RJ11) jack for remote status monitoring and the Constant Voltage Computer feature.
Describes the audio signal flow through the amplifier stages for CH/CL models.
Details the audio signal path for CH4 and CL4 models, including filters and error amp.
Specifies safe load impedances and voltage gain values for various models and modes.
Details AC voltage requirements, current draw, and connector type for different models.
Covers frequency response, phase response, signal-to-noise ratio, distortion, and damping factor.
Explains equations for calculating AC power draw, current, and thermal dissipation under various conditions.
Discusses cooling considerations for Contractor Series amplifiers, including rack mounting and airflow.
Provides guidelines for balanced and unbalanced input wiring, including problem-solving for input signals.
Details 4/8 ohm and 70V/100V operation modes, including their applications and requirements.
Covers output wiring, solving output problems, and selecting appropriate speaker cables.
Addresses issues like high-frequency oscillations and inductive loads, and protection methods.
Explains using fuses and outboard limiters to protect loudspeakers from thermal and transient damage.
Explains how to set up a circuit to light an LED when a fault status occurs.
Illustrates a restaurant audio system configuration using CH1, CL2, and CL4 amplifiers.
Shows a house of worship audio system setup utilizing CH1, CL2, and CL4 amplifiers.
Details how to obtain service globally and within North America, including factory service.
Information on the advance-replacement plan and how to contact Crown Audio Customer Service.
