Protection Features

The Peavey CS® Series incorporates several circuits to protect the amplifier and speakers under virtually any situation. Peavey has made the amplifiers as foolproof as possible by making them immune to short and open circuits, mismatched loads,

DC voltage and overheating. If a channel goes into the DDT™ gain reduction mode, the DDT LED illuminates. The clipping percentage or output power is instantly reduced. When a problem occurs that causes a channel to go into a protection mode, the PWR (Power) LED for that channel will turn off. DC voltage on the output or excessive subsonic frequencies will cause the speaker protection relay for that channel to open, protecting the speakers. If an amplifier channel overheats, the relay for that channel will open, disconnecting the load until the channel cools down, thus protecting the amplifier.

Distortion Detection Technique Limiting

Any time a channel is driven into hard, continuous clipping, the DDT circuit will automatically reduce the channel gain to a level just slightly into clipping, guarding the speakers against the damaging, high-power, continuous square waves that may be produced. Situations that may activate the DDT circuit include uncontrolled feedback, oscillations, an improper equipment setting or malfunction upstream from the amplifier. Normal program transients will not trigger DDT; only steady, excessive clipping will cause the DDT LED to illuminate.

LFC Impedance Sensing

CS Series amplifiers feature innovative circuitry for safe operation into any load. When an amplifier senses a load that overstresses the output stage, the Load Fault Correction circuit adjusts the channel gain to a safe level. Extreme load fault under high power levels will cause the speaker relay to disconnect the load for the associated channel. This method of output stage protection is far more effective than the standard limiting found on conventional power amplifiers. The LFC circuit is sonically transparent in normal use and unobtrusive when activated.

Thermal Protection

The internal fans will keep the amplifier operating well within its intended temperature range under all normal conditions. If a channel’s heat sink temperature reaches 85°C (which may indicate an obstructed air supply), that channel will independently protect itself by opening the speaker relay to disconnect the load until it has cooled. During this time, the PWR LED will go out and the cooling fans will continue operating at high speed.

Short Circuit

If an output is shorted, the LFC and thermal circuits will automatically protect the amplifier. The LFC circuit senses the short circuit as an extremely stressful load condition and attenuates the signal, protecting the channel’s output transistors from over-current stress. If the short circuit remains, the channel may eventually thermally protect itself by opening the speaker relay thereby disconnecting the load.

DC Voltage Protection

If an amplifier channel detects DC voltage or subsonic frequencies at its output terminals, the speaker protection relay for that channel will open, protecting the speakers.

Turn-On/Turn-Off Protection

Upon powering up, the amplifier mutes the input signals and stays in Protect mode with the speaker connect relays open for approximately four seconds. This allows the internal power supplies to charge and the amplifier to stabilize. After the relays engage, the signals slowly increase from muted to their normal level. Also, when power is removed, the input signals are muted so that no thumps or pops are heard.

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Peavey CS 4080 HZ, CS 3000 owner manual Protection Features
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CS 4080 HZ, CS 3000 specifications

The Peavey CS 3000 and CS 4080 HZ are powerhouse amplifiers designed for professional audio applications, catering to both musicians and sound engineers who require reliability and sonic excellence. These models are a part of Peavey's renowned CS series and offer a wide array of features and technologies to enhance performance and sound quality.

The Peavey CS 3000 delivers a robust performance with a power output of 2,400 watts at 4 ohms. This amplifier is particularly favored for its ability to handle demanding workloads while maintaining clarity and precision in sound reproduction. One of the standout features of the CS 3000 is its patented Peavey DDT (Distortion Detection Technique) compression, which automatically engages when the amplifier approaches its limits. This technology helps prevent clipping, ensuring a cleaner sound even at high volumes, making it ideal for live sound applications.

The CS 4080 HZ, on the other hand, is designed for high-frequency applications, providing 4,000 watts of output. This model features advanced circuitry that enhances its performance when powering high-impedance loads. Users will appreciate the built-in crossover networks that allow for precise tuning and integration with various sound systems, making it suitable for both bi-amp and full-range applications.

Both amplifiers feature Peavey's proprietary Turbosound speaker connections, which ensure a secure and efficient signal transfer, reducing the chances of interference or signal loss during use. The rugged chassis and heat management system are engineered for optimal airflow, preventing overheating during long sessions or extensive use, which is crucial in live sound settings.

Moreover, the CS 3000 and CS 4080 HZ incorporate comprehensive protection circuitry. This not only safeguards the amplifiers from damage due to overheating or short-circuit conditions but also extends the longevity of the units. The simple front-panel controls and status indicators allow users to easily monitor performance, making adjustments quickly as needed.

In summary, the Peavey CS 3000 and CS 4080 HZ stand out for their exceptional power, innovative technology, and durability. These amplifiers are engineered to meet the rigorous demands of professional audio environments, providing reliable performance for musicians, DJs, and sound technicians alike. Whether you're setting up for a concert or managing an event, these amplifiers prove to be indispensable tools for achieving high-quality audio experiences.
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