Front panel Switches and controls, Indicators

features overview 3

front panel

switches and controls

1AC Power Switch/Circuit Breaker

The CC Series amplifiers have a combination AC switch/circuit breaker on the front panel. If the switch shuts off during normal use, push it back to the ON position once. If it will not stay on, the amplifier needs servicing.

The power only breaks one side of the AC mains. Hazardous energy may be present in the enclosure when the power switch is in the off position.

2Input Attenuators

Whenever possible, set the attenuators fully clockwise to maintain optimum system headroom.The input attenuator controls (one for channel A, one for channel B) located at the front panel adjust gain for their respective amplifier channels in all modes. See the specifications at the end of this manual for standard voltage gain and input sensitivity information.

indicators

CCSeries amplifiers feature four front panel LED indicators per channel:ACL™ (Automatic Clip Limiting), Signal,Temp, and Active.These LED indicators inform the user of each channel’s operating status and warn of possible abnormal condi- tions.

3ACL LED

A channel’s ACL LED will light at the onset of clipping. If the LED’s are flashing quickly and intermittently, the channel is just at the clip threshold, while a steady, bright glow means the amp is clip limiting, or reducing gain to prevent severely clipped waveforms reaching

the loudspeakers. See the Automatic Clip Limiting section for more information. During initial power up the ACL LED will light indicating that the AUTORAMP™ gain reduction circuitry is activated.This will prevent sudden signal bursts when the speaker relays are closed.

4 Signal LED

This LED lights when its channel produces an output signal of about 4 volts RMS or more (0.1 volt or more at the input, with 0 dB attenuation and standard x40 voltage gain). It is useful in determining whether a signal is reaching and being amplified by the amplifier.

5Temp LED

The Temp LED lights to indicate that the channel’s output relay is open, disconnecting the speaker(s) due to an overheating condition. Once the channel temperature has returned to safe operating conditions the LED will turn off, the channel's output relay will close, and the speaker(s) will be reconnected.

6Active LED

The Active LED indicates that its channel’s output relay is closed and the channel is operational. It lights under normal operation and remains on even when the channel is in Automatic Clip Limiting or ACL gain reduction.These are protection features which leave the output relay closed. If the Active LED goes off, there is no signal at the output connectors.

When operating in the bridged mode, both attenuators must be in the same position so the speaker load will be equally shared between the channels. See the section on Bridged Mono Operation for more information and precautions.

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CC 1800, CC 4000, CC 2800, CC 5500 specifications

Crest Audio is renowned for its high-performance amplifiers, and the CC series stands out as a testament to the brand's commitment to quality and innovation in professional audio. The CC 1800, CC 5500, CC 2800, and CC 4000 models each bring unique features and technologies designed for various applications in live sound and installations.

The Crest Audio CC 1800 is a powerful workhorse, delivering 900 watts per channel at 4 ohms. It features a robust power supply and high-quality output devices, ensuring excellent performance and reliability. The CC 1800 is equipped with comprehensive protection circuitry to safeguard against overheating and short circuits, enhancing its durability in demanding environments. Its lightweight design combined with a compact chassis allows for easy transport and setup, making it a favorite among sound professionals.

Next in the lineup, the CC 5500 steps up with an impressive output of 1,300 watts per channel at 4 ohms. This amplifier is engineered for high efficiency and low distortion, making it ideal for driving large speaker systems in concert applications. The CC 5500 incorporates a sophisticated thermal management system, allowing it to operate at maximum capacity without compromising audio fidelity. Additionally, its versatile input options make it compatible with various sound systems, enhancing its utility across different setups.

The CC 2800 is designed for versatility, offering a balanced output of 1,000 watts per channel at 4 ohms. It features advanced circuitry that maximizes headroom and minimizes noise, ensuring clear, powerful sound reproduction in any setting. The CC 2800 also includes an integrated limiter system to prevent signal clipping, preserving audio integrity during high-energy performances. With its rugged build and quality components, this model is perfect for touring professionals and fixed installations alike.

Finalizing the series, the CC 4000 is a powerhouse, producing an extraordinary 1,500 watts per channel at 4 ohms. Its advanced design incorporates an innovative feedback topology that allows for exceptional transient response and low distortion levels. The CC 4000’s durable construction ensures reliability over time, even during extensive use. It also offers multiple outputs and detailed monitoring capabilities, making it a top choice for larger venues and more extensive audio setups.

In summary, the Crest Audio CC series — CC 1800, CC 5500, CC 2800, and CC 4000 — represents a range of amplifiers with advanced technologies, robust construction, and high performance. Each model is tailored to meet the specific needs of audio professionals looking for reliability and superior sound quality in various applications.

Crest Audio CC 1800, CC 5500, CC 2800, CC 4000 Front panel Switches and controls, Indicators

Models: CC 1800 CC 4000 CC 2800 CC 5500