1. Introduction
Thank you for choosing the HERTZ MPBX-300-S2 12-inch sealed subwoofer enclosure. This product is engineered to deliver optimized bass performance within a compact, ultra-shallow design, making it suitable for various car audio installations. This manual provides essential information for the proper installation, operation, and maintenance of your subwoofer enclosure.
Key features of the MPBX-300-S2 include:
- Ultra-shallow sealed enclosure optimized for MPS 300 S2 subwoofer performance.
- 15 mm (0.59 in.) wood thickness for robust construction.
- Internal bracing with solid corners to minimize resonances.
- 500W continuous power handling with a 2 Ohm impedance.
2. Safety Information
Please read and understand all safety instructions before installing or operating this product. Failure to follow these guidelines may result in injury or damage to the product or vehicle.
- Disconnect Vehicle Battery: Always disconnect the vehicle's negative battery terminal before beginning any electrical work to prevent short circuits and electrical shock.
- Professional Installation: If you are unsure about any aspect of installation, consult a qualified car audio professional.
- Proper Ventilation: Ensure the subwoofer enclosure is installed in a location with adequate ventilation to prevent overheating.
- Secure Mounting: Securely mount the enclosure to prevent it from shifting during vehicle movement, which could cause injury or damage.
- Wiring: Use appropriate gauge wiring for power, ground, and speaker connections. Ensure all connections are secure and insulated to prevent short circuits.
- Volume Levels: Prolonged exposure to high sound pressure levels can cause permanent hearing damage. Operate the audio system at moderate levels.
3. Package Contents
Verify that all items are present in the package:
- HERTZ MPBX-300-S2 Sealed Subwoofer Enclosure (1 unit)
- Mounting Hardware (screws, brackets, etc. - may vary by region)
- Owner's Manual (this document)
4. Setup and Installation
Proper installation is crucial for optimal performance and safety. Follow these steps carefully.
4.1 Choosing a Mounting Location
Select a secure and stable location in your vehicle, typically in the trunk or cargo area. Ensure the location does not obstruct vehicle controls, safety devices, or passenger movement. The ultra-shallow design allows for flexible placement in tight spaces.
Figure 1: Top-front view of the HERTZ MPBX-300-S2 sealed subwoofer enclosure.
4.2 Mounting the Enclosure
Use the provided mounting hardware to secure the enclosure firmly to the vehicle's chassis or a sturdy surface. Avoid mounting the enclosure in a way that could damage vehicle wiring or fuel lines. Ensure the enclosure is stable and will not move during sudden stops or turns.
Figure 2: Side view of the HERTZ MPBX-300-S2 enclosure, showing its compact profile.
4.3 Wiring Connections
The MPBX-300-S2 subwoofer has a 2 Ohm impedance. Connect the subwoofer to a compatible amplifier capable of stable operation at this impedance. Refer to your amplifier's manual for specific wiring diagrams and power requirements.
- Power Wiring: Connect the amplifier's power input directly to the vehicle's battery using an appropriate gauge power cable with an inline fuse.
- Ground Wiring: Connect the amplifier's ground terminal to a clean, unpainted metal surface on the vehicle's chassis.
- Remote Turn-On: Connect the amplifier's remote turn-on terminal to the remote output of your head unit or a switched 12V source.
- Speaker Wiring: Connect the subwoofer's terminals to the amplifier's speaker output terminals. Ensure correct polarity (+ to + and - to -) to avoid phase issues.
Figure 3: The HERTZ MPBX-300-S2 subwoofer with its protective grille removed, showing the speaker cone.
Figure 4: Cutaway view illustrating the internal bracing and subwoofer mounting within the enclosure.
5. Operating Instructions
Once installed, follow these steps to integrate and operate your subwoofer enclosure with your car audio system.
5.1 Initial Power-Up and System Check
- Reconnect the vehicle's negative battery terminal.
- Turn on your car audio head unit. The amplifier connected to the subwoofer should also power on.
- Start with the amplifier's gain control set to its minimum position.
- Play a familiar audio track with a good bass presence at a low volume.
- Gradually increase the amplifier's gain until the subwoofer output blends smoothly with the rest of your audio system. Avoid setting the gain too high, as this can lead to distortion and potential damage.
5.2 Adjusting Amplifier Settings
Most amplifiers designed for subwoofers include adjustable settings to fine-tune performance:
- Low-Pass Filter (LPF): Set the LPF to filter out high frequencies from the subwoofer, typically between 60 Hz and 100 Hz. This ensures the subwoofer only reproduces bass frequencies.
- Subsonic Filter (HPF): If available, set the subsonic filter to protect the subwoofer from playing frequencies below its resonant frequency, usually around 20-30 Hz.
- Bass Boost: Use bass boost sparingly, if at all. Excessive bass boost can cause distortion and damage.
- Phase Control: Experiment with the phase switch (0° or 180°) on your amplifier to achieve the best bass response and blend with your front speakers.
6. Maintenance
The HERTZ MPBX-300-S2 requires minimal maintenance to ensure long-lasting performance.
- Cleaning: Use a soft, dry cloth to wipe down the exterior of the enclosure. Avoid using harsh chemicals or abrasive cleaners.
- Inspection: Periodically check all wiring connections to ensure they are secure and free from corrosion. Inspect the enclosure for any signs of damage or wear.
- Environment: Keep the enclosure away from excessive moisture, direct sunlight, and extreme temperatures.
7. Troubleshooting
If you experience issues with your subwoofer enclosure, refer to the following troubleshooting guide:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from subwoofer |
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| Distorted sound |
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| Weak or muddy bass |
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If these steps do not resolve the issue, contact your authorized HERTZ dealer or customer support for further assistance.
8. Specifications
Technical specifications for the HERTZ MPBX-300-S2 sealed subwoofer enclosure:
| Feature | Specification |
|---|---|
| Brand | HERTZ |
| Model Number | MPBX-300-S2 |
| Speaker Type | Sealed Subwoofer Enclosure |
| Speaker Size | 12 inches |
| Woofer Diameter | 12 inches |
| Continuous Power Handling | 500 Watts |
| Peak Power Handling | 1000 Watts (as per product title, typically double continuous) |
| Impedance | 2 Ohms |
| Frequency Response | 400 Hz (Note: This value from specifications is likely the upper limit for the subwoofer's effective range, not its full response. Subwoofers typically operate much lower.) |
| Item Dimensions (D x W x H) | 23.9" x 6.89" x 15.79" (60.7 cm x 17.5 cm x 40.1 cm) |
| Item Weight | 10 pounds (4.54 kg) |
| Enclosure Material Thickness | 15 mm (0.59 in.) wood |
9. Warranty Information
The HERTZ MPBX-300-S2 Sealed Subwoofer Enclosure is covered by a 1-Year Manufacturer Warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage caused by improper installation, accident, misuse, abuse, negligence, unauthorized modification, or normal wear and tear.
To make a warranty claim, please retain your proof of purchase and contact your authorized HERTZ dealer or HERTZ customer support.
10. Support
For technical assistance, troubleshooting beyond this manual, or service inquiries, please contact:
- Your authorized HERTZ dealer where the product was purchased.
- HERTZ Customer Support (refer to the official HERTZ website for contact information).
Please have your product model number (MPBX-300-S2) and proof of purchase available when contacting support.
