BOSS Audio Systems ONYX N2000.4 4-Channel MOSFET Power Amplifier User Manual

1. Introduction

Thank you for purchasing the BOSS Audio Systems ONYX N2000.4 4-Channel MOSFET Power Amplifier. This manual provides detailed instructions for proper installation, operation, and maintenance of your amplifier. Please read this manual thoroughly before attempting installation or operation to ensure optimal performance and safety.

2. Safety Information

Improper installation or use can result in serious injury or damage to the amplifier or vehicle. Observe the following safety guidelines:

Professional Installation Recommended: For best results and to avoid damage, installation by a qualified professional is highly recommended.
Power Disconnection: Always disconnect the vehicle's negative battery terminal before starting any installation.
Wiring: Ensure all wiring is correctly connected and securely fastened. Use appropriate gauge wiring for power and speaker connections.
Ventilation: Mount the amplifier in a location that allows for adequate air circulation to prevent overheating. Do not cover the amplifier's heat sinks.
Moisture: Avoid mounting the amplifier in areas exposed to moisture or direct sunlight.
Fuses: Always replace fuses with the same type and rating.

3. Package Contents

Verify that your package contains the following items:

BOSS Audio Systems ONYX N2000.4 4-Channel Amplifier
Remote Subwoofer Level Control
Mounting Hardware (screws, washers)
User Manual (this document)

4. Key Features

The ONYX N2000.4 amplifier is designed to deliver powerful and clear audio performance. Key features include:

2000 Watts Max Power Output
4-Channel Configuration
MOSFET Power Supply
Remote Subwoofer Level Control
Variable Low Pass and High Pass Crossovers
Variable Input Gain Control
Bridgeable Outputs for 2-Channel Operation

5. Setup and Installation

Before beginning installation, ensure the vehicle's battery is disconnected. Plan your wiring carefully to avoid interference and ensure proper power delivery.

5.1 Mounting the Amplifier

Choose a mounting location that is dry, well-ventilated, and secure. Avoid mounting on carpet or in enclosed spaces that restrict airflow. Use the provided mounting hardware to secure the amplifier firmly to a solid surface.

5.2 Wiring Connections

Refer to the diagram below for proper wiring connections. Ensure all connections are tight and insulated to prevent short circuits.

BOSS Audio Systems ONYX N2000.4 4-Channel MOSFET Power Amplifier

Front view of the BOSS Audio Systems ONYX N2000.4 amplifier, showing the BOSS logo, model number, power rating, and connection labels for speaker outputs and power input.

5.2.1 Power Connections

+12V (Power): Connect to the positive terminal of the vehicle's battery using a heavy-gauge power cable (e.g., 4 AWG or larger). An inline fuse (not supplied) should be installed within 18 inches of the battery.
GND (Ground): Connect to a clean, unpainted metal surface of the vehicle chassis. Ensure a good electrical connection. Use a heavy-gauge cable of the same size as the +12V wire.
REM (Remote Turn-On): Connect to the remote turn-on output of your head unit. This wire turns the amplifier on and off with your car stereo.

5.2.2 Speaker Connections

The N2000.4 supports both 4-channel stereo and 2-channel bridged configurations.

4-Channel Stereo: Connect each speaker to its corresponding positive (+) and negative (-) terminals (CH1+, CH1-, CH2+, CH2-, CH3+, CH3-, CH4+, CH4-). Ensure correct polarity.
2-Channel Bridged: For higher power output to two speakers or subwoofers, bridge channels. Connect the positive (+) terminal of the speaker/subwoofer to CH1+ and the negative (-) terminal to CH2-. Similarly, for the second bridged output, connect to CH3+ and CH4-. Refer to the amplifier's labeling for specific bridged connection points. Minimum impedance for bridged operation is typically 4 ohms.

5.2.3 Audio Input Connections

Connect the RCA output cables from your head unit to the amplifier's RCA input jacks (FRONT L/R, REAR L/R).

5.2.4 Remote Subwoofer Level Control

Connect the remote level control cable to the designated port on the amplifier. Mount the control knob in an accessible location for easy adjustment of subwoofer output.

6. Operating and Adjustments

Once installed, fine-tune the amplifier settings for optimal sound quality.

6.1 Gain Control

The gain control matches the amplifier's input sensitivity to the output of your head unit. Start with the gain set to minimum. Turn your head unit volume to about 75% of maximum. Slowly increase the amplifier gain until you hear slight distortion, then back off slightly. This ensures maximum clean signal without clipping.

6.2 Crossover Settings (HPF/LPF)

The N2000.4 features variable high-pass (HPF) and low-pass (LPF) crossovers to direct specific frequency ranges to your speakers or subwoofers.

High Pass Filter (HPF): Used for full-range speakers to block low frequencies, preventing distortion and improving clarity. Set the HPF to a frequency appropriate for your speakers (e.g., 80Hz-120Hz).
Low Pass Filter (LPF): Used for subwoofers to block high frequencies, ensuring only bass notes are reproduced. Set the LPF to a frequency appropriate for your subwoofer (e.g., 80Hz-120Hz).

6.3 Bass Boost

If equipped, the bass boost control allows you to enhance low-frequency output. Use sparingly to avoid distortion and speaker damage.

6.4 Remote Subwoofer Level Control

This knob provides convenient adjustment of the subwoofer output level from the driver's seat without affecting other amplifier settings.

7. Maintenance

Regular maintenance ensures the longevity and performance of your amplifier.

Cleaning: Periodically wipe the amplifier's exterior with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
Ventilation: Ensure the amplifier's cooling fins remain free of dust and debris to maintain proper heat dissipation.
Fuse Replacement: If a fuse blows, replace it only with a fuse of the exact same type and amperage rating. Using an incorrect fuse can cause damage or fire.

8. Troubleshooting

If you experience problems with your amplifier, consult the following troubleshooting guide before contacting support.

Problem	Possible Cause	Solution
No Power / Amplifier Not Turning On	Blown fuse (inline or on amplifier) Poor power or ground connection No remote turn-on signal	Check and replace fuses. Verify +12V, GND, and REM connections. Ensure head unit is on and sending a remote signal.
No Sound Output	RCA input cables disconnected or faulty Speaker wires disconnected or shorted Gain set too low Head unit volume too low	Check RCA connections and cables. Inspect speaker wiring for shorts or disconnections. Adjust gain control. Increase head unit volume.
Distorted Sound	Gain set too high Improper crossover settings Speaker impedance mismatch Poor ground connection	Reduce gain setting. Adjust HPF/LPF settings. Verify speaker impedance is compatible. Check ground connection for tightness and cleanliness.
Amplifier Overheating	Insufficient ventilation Speaker impedance too low Sustained high output levels	Ensure adequate airflow around the amplifier. Verify speaker impedance is within specifications. Reduce volume or gain.

9. Specifications

Model	N2000.4
Channels	4-Channel
Amplifier Class	MOSFET
Max Power Output	2000 Watts
Dimensions (L x W x H)	16.42 x 10.19 x 2.22 inches
Weight	10.1 pounds
Remote Subwoofer Level Control	Included
Manufacturer	Boss Audio

10. Warranty and Support

10.1 Warranty Information

The BOSS Audio Systems ONYX N2000.4 amplifier comes with a 6-year warranty. This includes a 1-year over-the-counter exchange and 5 years for parts and labor. Please retain your proof of purchase for warranty claims.

10.2 Customer Support

For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact BOSS Audio Systems customer support. Refer to the official BOSS Audio Systems website for the most current contact information.

Note: Do not attempt to repair this unit yourself. Unauthorized repairs will void the warranty.

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BOSS Audio Systems N2000.4