AC Power Draw and Thermal Dissipation | Crown Audio CL4 instruction

	C O N T R A C T O R S E R I E S
CL4	AC Power Draw and Thermal Dissipation

This document provides detailed information about the amount of power and current drawn from the AC mains by the CL4 amplifier and the amount of heat produced under various conditions. The calculations pre- sented here are intended to provide a realistic and reliable depiction of the amplifier. The following assumptions or approximations were made:

•The amplifier’s available channels are loaded and full power is being delivered.

•The amplifier efficiency at standard 1-kHz power is estimated to be 77%.

•Quiescent power draw is approximately 140 watts.

•When running at full speed, typical power draw for the internal fan is approximately 12 watts.

•The estimated duty cycles take into account the typical crest factor for each type of source material.

•Duty cycle of pink noise is 50%.

•Duty cycle of highly compressed rock ‘n’ roll midrange is 40%.

•Duty cycle of rock ‘n’ roll is 30%.

•Duty cycle of background music is 20%.

•Duty cycle of continuous speech is 10%.

•Duty cycle of infrequent, short duration paging is 1%.

Here are the equations used to calculate the data presented in Figure 1:

The following equation converts power draw in watts to current draw in amperes:

The value used for Power Factor is 0.98. The Power Factor variable is needed to compensate for the difference in phase between the AC mains voltage and current. The following equation is used to calculate thermal dissipation:

The value used for inefficiency is 0.23 (1.00–0.77). The factor 3.415 converts watts to btu/hr. Thermal dissipation in btu is divided by the constant 3.968 to get kcal. If you plan to measure output power under real-world conditions, the following equation may also be helpful:

Figure 1 Power Draw, Current Draw and Thermal Dissipation at Various Duty Cycles

Crown International, Inc.

P.O. Box 1000

Elkhart, IN 46515-1000

TEL: 219-294-8200

FAX: 219-294-8FAX

www.crownaudio.com

For more details refer to the applicable Reference Manual or Contact Crown Audio Technical Support. The provided data should not be construed as specifications.

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CL4 specifications

The Crown Audio CL4 is an advanced power amplifier that exemplifies the perfect combination of performance, reliability, and versatility in professional audio systems. Built to deliver an exceptional audio experience, the CL4 is particularly well-suited for musical events, industrial applications, and large-scale installations.

One of the standout features of the Crown CL4 is its capacity to produce high output power while maintaining crystal-clear sound quality. With a power rating of 4,000 watts at 2 ohms, this amplifier is capable of driving even the most demanding speaker systems. Its efficient Class D topology ensures reduced heat generation and power consumption, making it an eco-friendly choice for audio professionals seeking to maximize performance while minimizing energy costs.

The CL4 employs advanced digital signal processing (DSP) technology, providing users with an array of customizable settings. This includes EQ adjustments, crossover settings, and advanced limiter functions, which grant flexibility for various sound reinforcement scenarios. The built-in DSP also supports network connectivity, allowing users to control and monitor multiple units through a single interface, thus streamlining setup and operation for large shows.

Another key characteristic of the Crown Audio CL4 is its durability and rugged design. Engineered with a robust chassis, the amplifier can withstand the rigors of frequent use in diverse environments. Its ventilation system is designed to ensure optimal airflow, preventing overheating during extended periods of operation, thereby extending the lifespan of the unit.

The CL4 also incorporates sophisticated protection circuitry that safeguards the amplifier against potential damage from various conditions, such as short circuits, overloads, and overheating. This allows sound engineers to focus on delivering high-quality audio without the constant worry of equipment failure.

With its lightweight design and integrated handles, the CL4 is easily transportable, making it an optimal choice for touring professionals. Its compatibility with multiple input and output formats ensures that it can seamlessly integrate into various audio setups regardless of the complexity.

In conclusion, the Crown Audio CL4 stands out as a powerful, versatile, and reliable amplifier that meets the high demands of professional audio applications. Its innovative technologies, outstanding sound quality, and robust construction make it a favored choice among audio engineers and sound reinforcement professionals.