HERTZ MPS-300-S2

HERTZ Mille Pro Shallow MPS 300 S2 Subwoofer Instruction Manual

Model: MPS-300-S2 | Brand: HERTZ

Introduction

This manual provides essential information for the proper installation, operation, and maintenance of your HERTZ Mille Pro Shallow MPS 300 S2 subwoofer. Please read these instructions carefully before use to ensure optimal performance and longevity of your product.

HERTZ Mille Pro Shallow MPS 300 S2 Subwoofer with grille

Image: HERTZ Mille Pro Shallow MPS 300 S2 Subwoofer with protective grille installed.

Key Features:

  • Ultra Shallow Overall Depth: Designed for installations where space is limited.
  • 500W Continuous Power Handling: Ensures robust and reliable performance.
  • Optimized for Extremely-Compact Sealed Enclosure: Ideal for enclosures between 20-24 liters (0.7-0.8 cubic feet).
  • Air Intercooling Revolution (A.I.R): Prevents air-compression-related limitations, enhancing sound quality.
  • Unrivaled Mechanical Excursion: Offers +20% more excursion compared to traditional designs for deeper bass.
Cutaway view of HERTZ Mille Pro Shallow Subwoofer showing internal components

Image: Cutaway view of the HERTZ Mille Pro Shallow Subwoofer, illustrating its internal design and Air Intercooling Revolution (A.I.R) technology.

Setup and Installation

Proper installation is crucial for the performance and safety of your subwoofer. If you are unsure about any steps, consult a professional installer.

1. Unpacking and Inspection:

Carefully remove the subwoofer from its packaging. Inspect for any signs of damage during transit. Ensure all components, including the grille, are present.

HERTZ Mille Pro Shallow MPS 300 S2 Subwoofer without grille

Image: HERTZ Mille Pro Shallow MPS 300 S2 Subwoofer without the protective grille, showing the cone.

2. Enclosure Requirements:

This subwoofer is optimized for extremely compact sealed enclosures, specifically 20-24 liters (0.7-0.8 cubic feet). Using an enclosure outside this recommended volume may compromise performance and reliability.

Example of a subwoofer installed in a compact enclosure

Image: Example of a subwoofer installed in a compact enclosure, illustrating suitable mounting for shallow subwoofers.

3. Mounting:

The MPS 300 S2 is designed for flush mount applications. Ensure the mounting surface is rigid and free from vibrations. Use appropriate mounting hardware to secure the subwoofer firmly.

  1. Cut a circular opening in the enclosure with the specified diameter (refer to specifications section).
  2. Ensure there is sufficient clearance behind the subwoofer for proper ventilation and excursion.
  3. Position the subwoofer and secure it using screws through the mounting holes. Do not overtighten.

4. Wiring Connections:

This is a 2Ω SVC (Single Voice Coil) subwoofer. Connect the subwoofer to a compatible amplifier. Ensure correct polarity (+ to + and - to -) to avoid phase issues and potential damage.

  • Use high-quality speaker wire of appropriate gauge for the power level.
  • Connect the positive (+) terminal of the subwoofer to the positive (+) output of the amplifier.
  • Connect the negative (-) terminal of the subwoofer to the negative (-) output of the amplifier.
  • Ensure all connections are secure and free from short circuits.
Rear view of HERTZ Mille Pro Shallow MPS 300 S2 Subwoofer showing terminals

Image: Rear view of the HERTZ Mille Pro Shallow MPS 300 S2 Subwoofer, highlighting the connection terminals.

Operating Instructions

Follow these guidelines for optimal performance and to prolong the life of your subwoofer.

1. Break-in Period:

Allow a break-in period of approximately 10-20 hours of normal listening before operating the subwoofer at high volumes. This allows the suspension components to loosen and reach their optimal performance characteristics.

2. Amplifier Gain Setting:

Set the amplifier gain correctly to match the output of your head unit. An improperly set gain can lead to distortion and potential damage to the subwoofer. Start with the gain at its lowest setting and slowly increase it until you hear distortion, then back off slightly.

3. Crossover Settings:

Utilize your amplifier's or head unit's low-pass filter (LPF) to send only low frequencies to the subwoofer. A typical LPF setting for a 12-inch subwoofer is between 60Hz and 80Hz. Experiment to find the best integration with your main speakers.

4. Volume Control:

Avoid prolonged operation at extremely high volumes where audible distortion is present. Distortion indicates that the subwoofer or amplifier is being overdriven, which can cause permanent damage.

Maintenance

The HERTZ Mille Pro Shallow MPS 300 S2 subwoofer requires minimal maintenance to ensure long-term performance.

  • Cleaning: Use a soft, dry cloth to wipe down the grille and surround. Avoid using harsh chemicals or abrasive cleaners.
  • Inspection: Periodically check the speaker cone and surround for any signs of damage, tears, or deterioration. Ensure all mounting screws remain tight.
  • Environmental Factors: Protect the subwoofer from extreme temperatures, direct sunlight, and moisture.

Troubleshooting Guide

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

ProblemPossible CauseSolution
No Sound from Subwoofer
  • Power issue to amplifier
  • Incorrect wiring connections
  • Amplifier in protection mode
  • Head unit settings
  • Check amplifier power, ground, and remote turn-on wires.
  • Verify all speaker and RCA connections for correct polarity and security.
  • Check amplifier fuses. Disconnect power, wait, and reconnect.
  • Ensure subwoofer output is enabled and volume is up on the head unit.
Distorted or Unclear Bass
  • Amplifier gain set too high
  • Incorrect crossover settings
  • Poor enclosure design or air leaks
  • Damaged subwoofer
  • Reduce amplifier gain until distortion disappears.
  • Adjust LPF to recommended range (60-80Hz).
  • Inspect enclosure for cracks or loose panels; seal any leaks.
  • Inspect subwoofer cone and surround for physical damage.
Weak or Muffled Bass
  • Incorrect wiring polarity
  • Amplifier gain too low
  • Subwoofer phase issue
  • Double-check positive and negative connections.
  • Increase amplifier gain gradually.
  • If your amplifier or head unit has a phase switch, try flipping it (0°/180°).

If the problem persists after trying these solutions, contact HERTZ customer support or a qualified car audio technician.

Technical Specifications

Below are the detailed technical specifications for the HERTZ Mille Pro Shallow MPS 300 S2 Subwoofer:

FeatureSpecification
BrandHERTZ
Model NumberMPS-300-S2
Speaker TypeSubwoofer
Subwoofer Diameter12 inches (300mm)
Maximum Peak Power1000 watts
Continuous Power Handling500 watts
Impedance2 ohm (Single Voice Coil)
Mounting TypeFlush Mount
Enclosure Material (Structure)Aluminum, Steel
Recommended Enclosure Volume20-24 Liters (0.7-0.8 Cubic Feet) Sealed
Item Weight10 pounds
Is WaterproofNo
Compatible Vehicle TypesSUVs, Select Cars, Trucks
Audio Driver TypeDynamic Driver
What's in the BoxSubwoofer, Metal structure and grille

Note: Specifications are subject to change without notice.

Warranty Information

The HERTZ Mille Pro Shallow MPS 300 S2 Subwoofer comes with a Limited Warranty.

Warranty Description: 1-Year Manufacturer Warranty.

For detailed terms and conditions of the warranty, including coverage and claim procedures, please refer to the official HERTZ website or contact HERTZ customer support. Keep your proof of purchase for warranty claims.

Customer Support

If you require further assistance, have questions not covered in this manual, or need technical support, please contact HERTZ customer service.

  • Manufacturer: Hertz
  • Official Website: www.hertz-audio.com
  • Online Resources: Check the HERTZ website for FAQs, additional manuals, and contact information.

When contacting support, please have your product model number (MPS-300-S2) and proof of purchase readily available.

© 2026 HERTZ. All rights reserved. Information in this manual is subject to change without notice.

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