MB Quart FKB146 4x6 Inch 2-Way Coaxial Car Speakers User Manual

Introduction

This manual provides comprehensive instructions for the installation, operation, and maintenance of your MB Quart FKB146 4x6 inch 2-way coaxial car speakers. Please read this manual thoroughly before installation and use to ensure proper function and longevity of your speakers.

The FKB146 speakers feature Butyl rubber surrounds for durability and enhanced mid-bass, a Pure Copper voice coil for strong magnetic fields, and a lightweight Kapton voice coil former for efficient heat dissipation. The natural fiber spider provides flexibility, while lightweight thermal-formed polypropylene cones enable faster midrange response. An over-coil cooling system allows for air exchange over the voice coil.

Safety Information

• Always disconnect the vehicle's battery before beginning any electrical installation to prevent short circuits.
• Professional installation is recommended for optimal performance and safety.
• Ensure all wiring is correctly connected, paying close attention to polarity, to avoid damage to the speakers or your audio system.
• Avoid exposing speakers to excessive moisture or extreme temperatures.
• Prolonged exposure to high volume levels can cause hearing damage. Use caution when adjusting audio levels.

Package Contents

Verify that your package contains the following items:

• Two pairs of MB Quart FKB146 4x6 inch 2-Way Coaxial Car Speakers

Setup and Installation

Tools Required

• Wire strippers/cutters
• Screwdriver set
• Drill (if new mounting holes are required)
• Electrical tape or heat shrink tubing
• Multimeter (for checking polarity and impedance)

Mounting Considerations

The MB Quart FKB146 speakers are designed for a mounting diameter/cut-out of approximately 5.5 x 3.46 inches, with an outside diameter of 5.94 x 3.84 inches. The mounting depth is 3 inches. Ensure adequate clearance behind the mounting surface for the speaker magnet and basket.

This image displays two MB Quart FKB146 speakers, highlighting their oval shape, black cone, and central silver tweeter.

1. Carefully remove the existing speakers or trim panels from the desired mounting location.
2. Test fit the FKB146 speakers to ensure they fit properly within the opening. Make any necessary adjustments to the opening, ensuring not to damage vehicle components.
3. Mark and drill new mounting holes if they do not align with existing ones.

Wiring Instructions

The FKB146 speakers have an impedance of 4 Ohms. Ensure your amplifier or head unit is compatible with this impedance. Proper wiring is crucial for optimal sound quality and to prevent damage.

A detailed view of one FKB146 speaker, showing the textured silver tweeter grille and the surrounding black polypropylene cone.

1. Identify the positive (+) and negative (-) terminals on both the speaker and the vehicle's speaker wiring. The speaker terminals are typically marked.
2. Strip approximately 1/2 inch of insulation from the speaker wires.
3. Connect the positive (+) wire from the vehicle to the positive (+) terminal on the speaker.
4. Connect the negative (-) wire from the vehicle to the negative (-) terminal on the speaker.
5. Secure all connections using crimp connectors, soldering, or by twisting and taping securely with electrical tape. Ensure no bare wires can short circuit.
6. Mount the speakers using the provided screws, ensuring they are snug but not overtightened.
7. Reinstall any removed trim panels.

Operating Instructions

Once installed, your MB Quart FKB146 speakers will operate as part of your car's audio system. Ensure your head unit or amplifier is properly connected and configured.

1. Turn on your car's audio system.
2. Start with the volume at a low level and gradually increase it to a comfortable listening level.
3. Adjust the balance, fader, bass, and treble settings on your head unit or amplifier to achieve your preferred sound.
4. Avoid playing audio at excessively high volumes for extended periods to prevent speaker damage and hearing fatigue.

Maintenance

To ensure the longevity and performance of your FKB146 speakers, follow these simple maintenance guidelines:

• Cleaning: Use a soft, dry cloth to gently wipe dust and debris from the speaker cones and grilles. Avoid using harsh chemicals, solvents, or abrasive cleaners.
• Moisture: Protect the speakers from direct exposure to water or excessive moisture. If they become wet, allow them to dry completely before use.
• Temperature: Avoid exposing speakers to extreme temperatures, both hot and cold, for prolonged periods.
• Connections: Periodically check wiring connections to ensure they remain secure and free from corrosion.

Troubleshooting

If you experience issues with your MB Quart FKB146 speakers, refer to the following common problems and solutions:

No Sound from Speakers

• Check Wiring: Ensure all speaker wires are securely connected to both the speakers and the amplifier/head unit, and that polarity is correct.
• Check Amplifier/Head Unit: Verify that your amplifier or head unit is powered on and functioning correctly. Check its fuses.
• Source Input: Confirm that the audio source (radio, CD, Bluetooth) is selected and playing.

Distorted or Unclear Sound

• Volume Level: Reduce the volume. Distortion often occurs when the amplifier or speakers are overdriven.
• Gain Settings: If using an amplifier, check its gain settings. Too high a gain can cause distortion.
• Wiring: Inspect speaker wires for frayed strands or loose connections that could cause interference.
• Speaker Damage: Visually inspect the speaker cone and surround for any tears or damage.

Intermittent Sound

• Loose Connections: Re-check all wiring connections at both the speaker and the amplifier/head unit.
• Short Circuit: Ensure no bare speaker wires are touching metal surfaces or other wires, which could cause intermittent shorts.

Specifications

Warranty Information

This MB Quart FKB146 product is covered by a Limited Warranty. The specific terms and duration of the warranty may vary by region and retailer. Please retain your proof of purchase.

For detailed warranty terms and conditions, including how to make a claim, please refer to the official MB Quart website or contact their customer support directly. Unauthorized service or modification may void your warranty.

Support

For technical assistance, troubleshooting, or any questions regarding your MB Quart FKB146 speakers, please utilize the following resources:

• Official Website: Visit the MB Quart Store for product information, FAQs, and support contact details.
• Customer Service: Refer to the MB Quart website for current customer service contact information (phone, email, or online support forms).