HERTZ ML-Power-4
Hertz Mille Legend Series ML-Power-4 D-Class 4 Channel Amplifier
Model: ML-Power-4
Introduction
The Hertz Mille Legend Series ML-Power-4 is a high-performance D-Class 4-channel amplifier designed to deliver exceptional audio quality and power for your car audio system. This manual provides essential information for the proper installation, operation, and maintenance of your ML-Power-4 amplifier to ensure optimal performance and longevity.
Key features include:
- Thermal Protection: Yes
- Automatic Remote Turn-Off
- CEA Compliant: Yes
Safety Information
Always observe the following safety precautions when installing and operating the amplifier:
- Disconnect the vehicle's battery negative terminal before beginning any installation work to prevent electrical shock or short circuits.
- Ensure all wiring is properly routed and secured to prevent damage from sharp edges or moving parts.
- Use appropriate gauge wiring for power and ground connections as specified in the installation section.
- Do not expose the amplifier to moisture or extreme temperatures.
- This amplifier is designed for 12V DC automotive electrical systems.
Product Overview
The ML-Power-4 amplifier is engineered for robust performance and reliability. Its compact D-Class design allows for efficient power delivery with minimal heat generation.
Setup and Installation
Proper installation is crucial for the performance and safety of your amplifier. It is recommended that installation be performed by a qualified professional.
Mounting Location
- Choose a dry, well-ventilated location away from direct sunlight and heat sources.
- Ensure sufficient airflow around the amplifier's heatsink.
- Mount the amplifier securely to a solid surface using appropriate hardware.
Wiring Connections
- Power Connection: Connect a fused power cable (minimum 4 AWG recommended) directly from the positive terminal of the vehicle's battery to the amplifier's +12V terminal. The fuse holder should be located within 18 inches of the battery.
- Ground Connection: Connect a ground cable of the same gauge as the power cable from the amplifier's GND terminal to a clean, unpainted metal point on the vehicle's chassis. Ensure a solid, low-resistance connection.
- Remote Turn-On: Connect a remote turn-on wire from your head unit's remote output to the amplifier's REM terminal. The ML-Power-4 features Automatic Remote Turn-Off.
- Signal Input: Connect RCA cables from your head unit's pre-amp outputs to the amplifier's input jacks. Ensure correct channel matching (Front L/R, Rear L/R).
- Speaker Output: Connect your speakers to the amplifier's speaker output terminals. Pay close attention to polarity (+/-) for each speaker. Ensure the speaker impedance matches the amplifier's specifications (2-Ohm stable).
Operating Instructions
Once installed, the amplifier will power on automatically when the remote turn-on signal is received from your head unit. Adjust the gain controls on 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.
The amplifier is equipped with Thermal Protection to prevent damage from overheating. If the amplifier becomes too hot, it will temporarily shut down until it cools to a safe operating temperature.
Maintenance
To ensure the longevity and optimal performance of your ML-Power-4 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 cooling fins are free from obstructions to allow for proper heat dissipation.
- Connections: Periodically check all wiring connections to ensure they are secure and free from corrosion.
Troubleshooting
If you experience issues with your amplifier, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No Power / Amplifier does not turn on | Blown fuse; Loose power/ground connection; No remote turn-on signal. | Check and replace fuse (2 x 40 A); Verify all power, ground, and remote connections are secure; Check head unit's remote output. |
| No Sound Output | Loose RCA cables; Incorrect gain settings; Speaker wires disconnected or shorted; Amplifier in protection mode. | Check RCA connections; Adjust gain; Inspect speaker wiring for shorts or disconnections; Turn amplifier off and on to reset protection. |
| Distorted Sound | Gain set too high; Poor signal input; Speaker impedance mismatch. | Reduce gain setting; Check head unit output; Verify speaker impedance (2-Ohm stable). |
| Amplifier Overheats | Insufficient ventilation; Speaker impedance too low; Prolonged high-volume operation. | Ensure proper airflow around amplifier; Check speaker impedance; Reduce volume or allow amplifier to cool. |
Specifications
| Feature | Specification |
|---|---|
| Model Number | ML-Power-4 |
| Channels | 4 |
| Power Output (RMS) | 250 WRMS x 4 at 2-Ohm |
| Thermal Protection | Yes |
| Weight | 5.4 lbs |
| Automatic Remote Turn-Off | Yes |
| Fuse Rating | 2 x 40 A |
| CEA Compliant | Yes |
| Product Dimensions (L x W x H) | 5.91 x 3.94 x 3.94 inches |
| Voltage | 1 Volts |
| Minimum Supply Voltage | 11 Volts (DC) |
| Mounting Type | Surface Mount |
Warranty Information
Hertz products are manufactured to the highest quality standards. This product is covered by a limited warranty against defects in materials and workmanship. Please refer to the warranty card included with your product or visit the official Hertz website for detailed warranty terms and conditions.
Customer Support
For technical assistance, troubleshooting, or service inquiries, please contact your authorized Hertz dealer or visit the official Hertz website for support resources and contact information.
You can find more information and products from HERTZ at their official store: HERTZ Store on Amazon.
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.