Behringer NX4-6000 Power Amplifier User Manual

Introduction

Thank you for choosing the Behringer NX4-6000 Ultra-Lightweight 6000-Watt 4-Channel Class-D Power Amplifier. This manual provides essential information for the safe and efficient operation of your new amplifier. Please read this manual thoroughly before operating the device to ensure proper usage and to maximize its lifespan. Keep this manual for future reference.

The NX4-6000 is designed for professional audio applications, offering high power output in a compact and lightweight form factor. Its Class-D technology ensures high efficiency and cool operation, while the Smart Sense Loudspeaker Impedance Compensation provides reliable performance with various speaker loads.

Important Safety Instructions

Always follow these basic safety precautions when using electrical equipment:

• Read these instructions.
• Keep these instructions.
• Heed all warnings.
• Follow all instructions.
• Do not use this apparatus near water.
• Clean only with a dry cloth.
• Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
• Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
• Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
• Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
• Only use attachments/accessories specified by the manufacturer.
• Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
• Unplug this apparatus during lightning storms or when unused for long periods of time.
• Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

Product Overview

The Behringer NX4-6000 is a powerful 4-channel amplifier designed for demanding audio environments. Its front panel features intuitive controls and indicators for each channel, while the rear panel provides comprehensive connectivity options.

Figure 1: Front view of the Behringer NX4-6000 Power Amplifier. This image displays the amplifier's front panel, featuring four distinct channels, each equipped with signal and protect/limit indicators. Below these indicators are individual gain control knobs for each channel (CH A, CH B, CH C, CH D). A prominent power button is located on the right side. The unit is presented in a sleek black finish, designed for rack-mounting, with ventilation grilles on both sides of the front panel.

Front Panel Features:

• Channel Gain Controls: Individual rotary knobs for adjusting the input level of each of the four channels (CH A, CH B, CH C, CH D).
• Signal Indicators: LED indicators for each channel that illuminate when an audio signal is present.
• Protect/Limit Indicators: LEDs that indicate when the amplifier is in protect mode (due to overload or fault) or when the signal is clipping (limiting).
• Power Button: Main switch to turn the amplifier on or off.
• Ventilation Grilles: Designed for optimal airflow to keep the unit cool during operation.

Rear Panel Features (General):

• Input Connectors: Typically XLR and/or 1/4" TRS for balanced audio input.
• Output Connectors: Speakon connectors for connecting to loudspeakers.
• Power Inlet: IEC connector for the AC power cord.
• Cooling Fans: For thermal management.
• Mode Switches: (e.g., Stereo, Mono, Bridge) and Crossover settings (if applicable).

Setup

Unpacking and Inspection:

1. Carefully unpack the amplifier and retain the packaging materials for future transport or storage.
2. Inspect the unit for any signs of damage that may have occurred during transit. If damage is found, contact your dealer immediately.

Placement and Ventilation:

• Ensure adequate ventilation around the amplifier. Do not block the ventilation openings.
• For rack-mounting, ensure proper airflow within the rack. Avoid placing the amplifier directly above heat-generating equipment.
• Place the amplifier on a stable, level surface if not rack-mounting.

Connections:

Before making any connections, ensure the amplifier is turned off and unplugged from the power outlet.

1. Input Connections: Connect your audio source (mixer, preamplifier, etc.) to the input connectors on the rear panel using high-quality balanced XLR or 1/4" TRS cables. Ensure correct channel assignment (e.g., Left to CH A, Right to CH B).
2. Output Connections: Connect your loudspeakers to the Speakon output connectors. Ensure the correct impedance matching between the amplifier and your speakers. Refer to the amplifier's specifications and your speaker's specifications for compatible impedance ranges. The NX4-6000 features Smart Sense Loudspeaker Impedance Compensation for optimized performance.
3. Power Connection: Connect the supplied AC power cord to the power inlet on the rear panel and then to a grounded electrical outlet. Ensure the power supply voltage matches the amplifier's requirements (100V as per specifications).

Note: Always use appropriate cables for audio signals and speaker connections to prevent signal loss or damage.

Operating Instructions

Powering On/Off:

1. Ensure all gain controls on the front panel are set to their minimum position (fully counter-clockwise) before powering on.
2. Press the Power button on the front panel to turn the amplifier on. The Power LED will illuminate.
3. When powering off, first reduce all gain controls to minimum, then press the Power button.

Adjusting Gain:

• Start with the gain controls at their minimum.
• Play audio through your source at a moderate level.
• Slowly increase the gain control for each channel until the desired volume is achieved.
• Monitor the Signal and Protect/Limit LEDs. The Signal LED should flicker with audio presence. If the Protect/Limit LED illuminates frequently or stays on, reduce the gain to prevent clipping and potential damage to speakers or the amplifier.

Operating Modes (Refer to Rear Panel):

The NX4-6000 may feature switches on the rear panel to select different operating modes:

• Stereo Mode: Each channel operates independently, receiving its own input signal and driving its own speaker.
• Mono Mode: Combines input signals to a single mono output, typically used for driving multiple speakers with the same signal.
• Bridge Mode: Combines two channels into a single, more powerful mono output, typically used for driving a single, high-power subwoofer. Consult the manual for specific bridging instructions and minimum impedance requirements.

Caution: Incorrect impedance matching in Bridge mode can severely damage the amplifier and speakers. Always verify speaker impedance before operating in Bridge mode.

Maintenance

Cleaning:

• Always disconnect the amplifier from the power supply before cleaning.
• Use a soft, dry cloth to clean the exterior surfaces.
• Do not use abrasive cleaners, solvents, or waxes.
• Periodically clean the ventilation grilles to ensure proper airflow and prevent dust buildup. A soft brush or vacuum cleaner with a brush attachment can be used.

Storage:

• If storing the amplifier for an extended period, ensure it is clean and dry.
• Store it in a cool, dry place, away from direct sunlight and extreme temperatures.
• It is recommended to store the amplifier in its original packaging to protect it from dust and physical damage.

Troubleshooting

If the problem persists after attempting these solutions, please contact qualified service personnel or Behringer customer support.

Specifications

Warranty and Support

Behringer products are designed and manufactured to the highest quality standards. For detailed warranty information, please refer to the warranty card included with your product or visit the official Behringer website. Warranty terms may vary by region.

For technical support, service, or spare parts, please contact your authorized Behringer dealer or visit the support section of the Behringer website. When contacting support, please have your product model number (NX4-6000) and serial number ready.

Online Resources:

• Behringer Official Website
• Behringer Support Page