Hertz Mille Pro Shallow MPS 250 S4 Subwoofer User Manual

Introduction

Thank you for choosing the Hertz Mille Pro Shallow MPS 250 S4 Subwoofer. This manual provides essential information for the proper installation, operation, and maintenance of your new subwoofer. Please read this manual thoroughly before using the product to ensure optimal performance and longevity.

The Mille PRO shallow subwoofers are engineered for exceptional audio performance in compact spaces, making them ideal for installations where depth is limited. The MPS 250 S4 is specifically optimized for ultra-compact sealed enclosures, starting from just 14 liters (0.49 cubic feet). Its innovative design allows for impressive cone excursion, exceeding traditional designs by 20%, while maintaining a shallow profile.

Package Contents

Upon opening the package, please verify that all components are present and in good condition:

• Hertz Mille Pro Shallow MPS 250 S4 Subwoofer
• Full metal sturdy structure composed by a solid cast aluminum ring
• Steel mesh black grille with diamond-cut Hertz Logo
• User Manual (this document)

Image: Hertz Mille Pro Shallow MPS 250 S4 Subwoofer, showcasing its design without the protective grille.

Image: Hertz Mille Pro Shallow MPS 250 S4 Subwoofer, shown with the included steel mesh black grille installed for protection.

Setup and Installation

Proper installation is crucial for the performance and safety of your subwoofer. It is highly recommended that installation be performed by a qualified professional.

Enclosure Requirements

The MPS 250 S4 is designed for optimal performance in ultra-compact sealed enclosures.

• Recommended Sealed Box Volume: Minimum 14 Liters (0.49 Cubic Feet)
• Ensure the enclosure is rigid and airtight to prevent air leaks and vibrations.
• Consider the internal volume occupied by the subwoofer itself when calculating the net enclosure volume.

Mounting

The subwoofer features a shallow design for versatile mounting options, such as under vehicle seats or in tight compartments.

1. Carefully measure and cut the mounting hole in your enclosure according to the subwoofer's dimensions.
2. Secure the subwoofer firmly to the enclosure using appropriate screws, ensuring an airtight seal.
3. Attach the protective grille to the subwoofer using the provided aluminum ring and screws.

Image: Side view of the Hertz Mille Pro Shallow MPS 250 S4 Subwoofer, highlighting its shallow depth and the yellow suspension system.

Wiring

The MPS 250 S4 is a 4Ω SVC (Single Voice Coil) subwoofer.

• Connect the subwoofer to a suitable amplifier capable of delivering the required power (500W Continuous, 1000W Peak) at a 4Ω load.
• Ensure correct polarity (+ to + and - to -) to avoid phase issues and ensure proper sound reproduction.
• Use high-quality speaker wire of appropriate gauge for the power levels and cable length to minimize power loss.

Operating Instructions

Once installed, follow these guidelines for optimal operation of your Hertz subwoofer.

Initial Power-Up and Break-In

• After installation, start with the amplifier gain set to minimum.
• Gradually increase the volume and amplifier gain to a moderate level.
• Allow a break-in period of approximately 10-20 hours of moderate use before operating the subwoofer at high volumes. This allows the suspension components to loosen and perform optimally.

Amplifier Settings

• Low-Pass Filter (LPF): Set the LPF on your amplifier to a frequency typically between 60Hz and 100Hz, depending on your system's overall frequency response and personal preference. This ensures the subwoofer only reproduces low frequencies.
• Subsonic Filter (HPF): If your amplifier has a subsonic filter, set it slightly below the tuning frequency of your enclosure (for sealed boxes, typically around 20-25Hz) to protect the subwoofer from over-excursion at very low frequencies.
• Gain Setting: Adjust the amplifier gain carefully. Do not use the gain control as a volume knob. It should be set to match the output voltage of your head unit. Over-driving the amplifier can lead to distortion and damage to the subwoofer.

Listening Levels

While the MPS 250 S4 is designed for high performance, prolonged listening at extremely high volumes can cause hearing damage and may stress the subwoofer. Listen responsibly.

Maintenance

The Hertz Mille Pro Shallow MPS 250 S4 Subwoofer requires minimal maintenance to ensure long-term performance.

• Cleaning: Use a soft, dry cloth to wipe down the subwoofer and grille. Avoid using harsh chemicals or abrasive cleaners, which can damage the finish or components.
• Inspection: Periodically inspect the subwoofer for any signs of damage, such as tears in the cone or surround, or loose connections. Address any issues promptly.
• Environment: Ensure the subwoofer is installed in a stable environment, protected from extreme temperatures, direct sunlight, and moisture.

Troubleshooting

If you experience issues with your subwoofer, refer to the following common problems and solutions.

If the problem persists after attempting these solutions, please contact a qualified car audio technician or Hertz customer support.

Specifications

Detailed technical specifications for the Hertz Mille Pro Shallow MPS 250 S4 Subwoofer:

Image: Detailed cutaway view of the Hertz Mille Pro Shallow MPS 250 S4 Subwoofer, illustrating its internal structure and components.

Warranty Information

The Hertz Mille Pro Shallow MPS 250 S4 Subwoofer comes with a limited warranty. The specific terms and duration of the warranty may vary by region and retailer.

Please retain your proof of purchase (receipt or invoice) as it will be required for any warranty claims. The warranty typically covers defects in materials and workmanship under normal use. It does not cover damage resulting from improper installation, abuse, accidents, modifications, or unauthorized repairs.

For detailed warranty terms and conditions, please refer to the warranty card included with your product or visit the official Hertz website.

Customer Support

For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Hertz customer support or your authorized dealer.

You can find more information and support resources by visiting the official Hertz website: Hertz Official Store on Amazon.