Safety, Speaker protection | Crest Audio CC 5500, CC 2800, CC 4000

Models: CC 1800 CC 4000 CC 2800 CC 5500

6safety

CCTM owner’s manual

speaker protection

All loudspeakers have electrical, thermal and physical limits that must be observed to prevent damage or failure.Too much power, low frequencies applied to high frequency drivers, severely clipped waveforms,and DC voltage can all be fatal to cone and compression drivers.The Crest Audio CC Series amplifiers automatically protect speakers from DC voltages and subsonic signals. For more information, see the section on Protection Features. Mid- and high-frequency speakers, especially compression drivers, are highly susceptible to damage from overpowering, clipped waveforms, or frequencies below their rated passband. Be extremely careful that the low and mid bands of an electronic crossover are connected to the correct amplifiers and drivers and not accidentally connected to those for a higher frequency band.The amplifier’s clipping point is its maximum peak output power, and some of the higher power Crest Audio

CCSeries amplifiers can deliver more power than many speakers can safely handle. Be sure the peak power capability of the amplifier is not excessive for your speaker system.

To ensure that the speakers never receive excessive power and that the amplifier never clips, use a properly adjusted external limiter (or a compressor with a ratio of 10:1 or higher) to control power output. In systems with active electronic crossovers, use one for each frequen- cy band.The clip limiter will automatically limit the duration of continuous square waveforms applied to the speakers.The amplifier will, however, allow normal musical transient bursts to pass. Some speaker systems are packaged with processors that have power limiting circuits and should not require additional external limiting.

Fuses may also be used to limit power to speaker drivers, although as current-limiting (rather than voltage-limiting devices) they are an imperfect solution. As the weakest links, fuses only limit once before needing replacement. Some poor quality fuses have a significant series resistance that could degrade the amplifier’s damping of the speaker’s motion and may even deteriorate the system’s sound quality. If you elect to use fuses, check with the speaker manu- facturer to determine the proper current rating and time lag required.

Do not drive any low-frequency speaker enclosure with frequencies lower than its own tuned frequency.The reduced acoustical damping could cause a ported speaker to bottom out even at moderate power. Consult the speaker system specifications to determine its frequency limits.

amplifier maintenance and user responsibility

A CC Series amplifier requires no routine maintenance and should never need any internal adjustment during its lifetime.Your CC Series amplifier is very powerful and can be potentially dangerous to loudspeakers and humans alike. It is your responsibility to read the Important Precautions section in the front of this manual, and to make sure that the amplifier is installed, wired and operated properly. Many loudspeakers can be easily damaged or destroyed by overpowering, especially with the high power available from a bridged amplifier. Read the Speaker Protection section and always be aware of the speaker’s continuous and peak power capabilities.

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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.