Nemesis Audio NA-2KM
Nemesis Audio NA-2KM 2,000 Watt Mono Block Class D Amplifier Instruction Manual
Model: NA-2KM | Brand: Nemesis Audio
1. Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of your Nemesis Audio NA-2KM 2,000 Watt Mono Block Class D Amplifier. Please read this manual thoroughly before installation and use to ensure proper function and safety.
The Nemesis Audio NA-2KM is a high-performance 1-channel monoblock amplifier designed to deliver powerful and clear audio output for your car audio system, specifically optimized for subwoofers.
2. Key Features
- 1-Channel / Monoblock Car Audio Amplifier
- RMS / MAX @ 1 Ohm: 1000W / 2000W
- Minimum Load: 1 Ohm
- Frequency Response: 8Hz – 180Hz
- Input Level: 0.2V – 5V
- LPF (Low Pass Filter): 40Hz – 180Hz
- Subsonic Filter: 5Hz – 50Hz
- Bass Boost Frequency: 30Hz – 80Hz
- Bass Boost Level: 0-12dB
- THD at 4 Ohm load 30% Rated Power: <0.2%
- Signal to Noise Ratio: 70dB
- Best Efficiency: 85%
- Dimensions (LxWxH): 266.5 x 185 x 55mm (Approx. 13 x 3 x 9 inches)
- Weight: Approx. 6 Lbs
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3. Setup and Installation
Proper installation is crucial for the performance and longevity of your amplifier. It is highly recommended that installation be performed by a qualified car audio professional.
3.1 Wiring Considerations
- Ensure all power and ground wires are of appropriate gauge (e.g., 0 gauge for optimal performance with this amplifier) and securely connected.
- Use a proper ANL fuse in the power line, close to the battery, to protect the system.
- Verify speaker impedance matches the amplifier's minimum load requirement (1 Ohm for NA-2KM) to prevent damage.
- Route all wiring carefully to avoid pinching, abrasion, or interference with vehicle components.
3.2 Mounting
Mount the amplifier in a location that allows for adequate ventilation to prevent overheating. Avoid mounting in enclosed spaces without airflow. The amplifier is designed for surface mounting.
4. Operating Instructions
Once properly installed, the Nemesis Audio NA-2KM amplifier requires minimal user interaction for daily operation. Adjustments are typically made during the initial setup phase to match your audio system components.
4.1 Adjusting Settings
- Gain Control: This adjusts the input sensitivity of the amplifier to match the output voltage of your head unit. Start with the gain at minimum and slowly increase it until the desired volume is achieved without distortion.
- LPF (Low Pass Filter): This filter allows only frequencies below the set point to pass through to the subwoofer. Adjust this to blend the subwoofer's output seamlessly with your main speakers.
- Subsonic Filter: This filter removes extremely low frequencies that are inaudible and can cause damage to your subwoofer. Set this slightly below your subwoofer's port tuning frequency (if applicable) or around 20-30Hz.
- Bass Boost: This feature provides an adjustable boost to bass frequencies. Use sparingly to avoid distortion and potential damage to your speakers. An external bass boost controller may also be available for convenient adjustment from the driver's seat.
It is recommended to make these adjustments with caution and ideally with the assistance of an experienced audio technician to prevent damage to your equipment.
5. Maintenance
To ensure optimal performance and longevity of your Nemesis Audio NA-2KM amplifier, follow these simple maintenance guidelines:
- Cleaning: Periodically wipe the amplifier's exterior with a soft, dry cloth to remove dust and debris. Do not use harsh chemicals or abrasive cleaners.
- Ventilation: Ensure that the amplifier's heat sink fins are not obstructed. Proper airflow is essential to dissipate heat and prevent overheating.
- Connections: Occasionally check all wiring connections to ensure they are secure and free from corrosion. Loose connections can lead to poor performance or damage.
6. Troubleshooting
If you experience issues with your Nemesis Audio NA-2KM amplifier, refer to the following common problems and solutions before seeking professional assistance.
| Problem | Possible Cause | Solution |
|---|---|---|
| No Power / Amplifier Not Turning On | Blown fuse, loose power/ground connection, faulty remote turn-on wire. | Check and replace fuse if necessary. Verify all power, ground, and remote wire connections are secure. Ensure remote wire is receiving 12V from head unit. |
| No Sound Output | Loose RCA cables, incorrect gain setting, speaker wires disconnected, amplifier in protect mode. | Check RCA cable connections. Adjust gain. Verify speaker wire connections. Check for protect light (usually red) and refer to overheating section. |
| Amplifier Overheating / Goes into Protect Mode | Insufficient ventilation, improper speaker impedance (too low), gain set too high, prolonged high-volume use. | Ensure adequate airflow around the amplifier. Verify speaker impedance is 1 Ohm or higher. Reduce gain setting. Allow amplifier to cool down. Consider adding external cooling if issue persists. |
| Distorted Sound | Gain set too high, improper LPF/subsonic settings, poor quality audio source. | Reduce gain setting. Adjust LPF and subsonic filters. Ensure audio source is clean and undistorted. |
7. Technical Specifications
| Specification | Value |
|---|---|
| Item Model Number | NA-2KM |
| Brand | Nemesis Audio |
| Number of Channels | 1 |
| Output Power (Max) | 2000 Watts |
| RMS / MAX @ 4 Ohm | 400W / 800W |
| RMS / MAX @ 2 Ohm | 600W / 1200W |
| RMS / MAX @ 1 Ohm | 1000W / 2000W |
| Input Level | 0.2V – 5V |
| Frequency Response | 8Hz – 180Hz |
| LPF (Low Pass Filter) | 40Hz – 180Hz |
| Subsonic Filter | 5Hz – 50Hz |
| Bass Boost Frequency | 30Hz – 80Hz |
| Bass Boost Level | 0-12dB |
| THD at 4 Ohm load 30% Rated Power | <0.2% |
| Signal to Noise Ratio | 70dB |
| Best Efficiency | 85% |
| Minimum Load | 1 Ohm |
| Item Dimensions L x W x H | 13 x 3 x 9 inches (266.5 x 185 x 55mm) |
| Item Weight | 6 pounds |
| Voltage | 5 Volts (Input range 0.2V - 5V) |
| Manufacturer | Nemesis Audio |
| Mounting Type | Surface Mount |
| Specification Met | FCC |
| UPC | 650905749339 |
8. Important Safety Information
IMPORTANT: Please consult a car audio professional before attempting installation. When bridging two amplifiers, always seek assistance from a professional installer to ensure safety and proper functionality.
Improper installation or use can lead to equipment damage, vehicle damage, or personal injury. Always disconnect the vehicle's battery before performing any wiring or installation work.
9. Warranty and Support
Nemesis Audio stands behind the quality of its products. For specific warranty terms and conditions, please refer to the warranty card included with your purchase or visit the official Nemesis Audio website.
If you encounter any issues or require technical assistance, please contact Nemesis Audio customer support. Have your model number (NA-2KM) and purchase information ready when contacting support.
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