OnlyFactoryDirect 8D Dual 8-Inch Subwoofer Enclosure Instruction Manual

Introduction

This manual provides detailed instructions for the setup, installation, operation, and maintenance of your OnlyFactoryDirect 8D Dual 8-Inch Sealed Subwoofer Enclosure. This enclosure is designed for automotive audio systems, accommodating two 8-inch woofers to enhance bass response.

The enclosure features a robust construction from high-quality MDF hardwood, finished with durable black aviation carpet. It includes built-in terminals with gold screw posts and wire leads for convenient connection.

Product Overview

Image: The OnlyFactoryDirect 8D dual 8-inch sealed subwoofer enclosure, showcasing its carpeted exterior and two circular openings for woofers.

The OnlyFactoryDirect 8D enclosure is a sealed design, optimized for specific acoustic performance. It features two 8-inch woofer holes, each with a diameter of 7.125 inches. The enclosure is constructed from high-quality MDF hardwood, ensuring durability and acoustic integrity. The exterior is covered with black aviation carpet for a professional finish.

Setup and Installation

1. Preparing the Enclosure

Image: Interior view of the subwoofer enclosure, showing the pre-installed wire leads for connecting to the woofers.

The enclosure comes fully assembled. Before installing your woofers, ensure the internal wiring is properly connected to the terminal cups. The enclosure features two separate chambers, each with its own terminal cup.

2. Wiring the Woofers

Image: Rear view of the subwoofer enclosure, highlighting the two terminal cups with gold screw posts for external wiring.

Connect your 8-inch woofers to the internal wire leads. Ensure correct polarity: positive (+) from the woofer to the positive terminal, and negative (-) to the negative terminal. For a secure connection, it is recommended to use crimp-on ring terminals or spade connectors on your speaker wire, rather than simply wrapping bare wire around the posts. This prevents loose connections and potential short circuits.

3. Mounting the Woofers

Carefully place each 8-inch woofer into its respective opening. Align the mounting holes on the woofer frame with the pre-drilled holes on the enclosure. Use appropriate wood screws to secure the woofers. Exercise caution to avoid overtightening or damaging the woofer's surround.

4. Installing Speaker Grills (Optional)

If using speaker grills, position them over the mounted woofers. Secure the grills using the provided screws or suitable alternatives. Grills help protect the woofers from accidental damage, especially in vehicle trunks where items may shift.

5. Securing the Enclosure in Your Vehicle

To prevent the enclosure from sliding in your vehicle's trunk or cargo area, consider applying self-adhesive hook-and-loop fastener strips (Velcro) to the bottom of the enclosure. The hook side of the Velcro will grip the carpeted surface of your vehicle, providing stability.

Operation

Once the woofers are installed and the enclosure is secured, connect the external speaker wires from the enclosure's terminal cups to your car audio amplifier. Ensure correct polarity and impedance matching with your amplifier. This enclosure is designed to present a 2-ohm load when wired appropriately for dual 4-ohm single voice coil subwoofers.

Maintenance

To maintain the appearance and performance of your subwoofer enclosure:

• Regularly clean the black aviation carpet with a soft brush or vacuum cleaner to remove dust and debris.
• Avoid placing heavy or sharp objects directly on the woofers or the enclosure to prevent damage.
• Ensure all connections remain tight and secure to prevent intermittent sound or damage to components.

Troubleshooting

If you experience issues with your subwoofer enclosure, consider the following:

• No Sound or Intermittent Sound: Check all wiring connections, both internal to the enclosure and external to the amplifier. Ensure no wires are loose or shorting. Verify amplifier power and settings.
• Distorted Sound: Check amplifier gain settings. Excessive gain can lead to distortion. Ensure woofers are securely mounted and not vibrating against the enclosure.
• Enclosure Movement: If the enclosure slides during vehicle movement, reinforce the Velcro strips on the bottom or consider additional securing methods.

Specifications

Image: Diagram illustrating the dimensions of the subwoofer enclosure: 10 inches (Height) x 20 inches (Length) x 7 inches (Top Depth) x 9.75 inches (Bottom Depth).

Warranty

This product comes with a Limited Warranty. Please refer to the product packaging or contact OnlyFactoryDirect customer service for specific warranty terms and conditions.