Atrend Bbox A184-12CP Dual 12-inch Sealed Subwoofer Enclosure User Manual

1. Overview

The Atrend Bbox A184-12CP is a dual 12-inch sealed subwoofer enclosure designed for optimal bass response and low-frequency reproduction. This enclosure is specifically engineered for a precise fit in 2007-2020 Chevrolet/GMC Silverado/Sierra Crew Cab vehicles, ensuring seamless integration without obstructing the rear seat's operation.

The enclosure is constructed with high-grade MDF and features a specially formulated aliphatic wood glue for an airtight seal, reinforced with pneumatic applied brad nails for structural integrity and to prevent leaks or rattles.

Figure 1: Atrend Bbox A184-12CP Dual 12-inch Sealed Subwoofer Enclosure.

Key Features:

• Accu-Tuned Design: Optimized for 12-inch dual sealed subwoofers, providing ideal bass response and low-frequency reproduction.
• OEM-Fit: Custom-engineered for 2007-2020 Chevrolet/GMC Silverado/Sierra Crew Cab models, ensuring a perfect fit under the rear seat.
• Durable Construction: Made from high-grade MDF for structural rigidity and no-flex performance.
• Airtight Seal: Utilizes specially formulated aliphatic wood glue and pneumatic applied brad nails for a secure, rattle-free enclosure.
• Integrated Amplifier Room: Designed with space for amplifier placement.

2. Setup and Installation

2.1 Vehicle Compatibility

This enclosure is designed to fit the following vehicles:

• 2007 - 2020 Chevrolet/GMC Silverado/Sierra Crew Cab
• 2007 - 2020 1500 Chevrolet/GMC Silverado/Sierra Extended Cab
• 2007 - 2020 2500HD/3500HD Chevrolet/GMC Silverado/Sierra Extended Cab

Note: This enclosure will fit with a 60/40 rear bench seat option.

Figure 2: Vehicle compatibility and fitment illustration.

2.2 Pre-Installation Check

Before beginning installation, ensure you have all necessary components:

• Atrend Bbox A184-12CP Subwoofer Enclosure
• Two 12-inch subwoofers (not included)
• Appropriate wiring for subwoofers and amplifier
• Tools for mounting subwoofers (screwdriver, drill if necessary)

2.3 Subwoofer Installation into Enclosure

1. Prepare Subwoofers: Refer to your subwoofer manufacturer's instructions for any specific preparation steps. Ensure your subwoofers have a mounting depth of 6.5 inches or less and a cutout diameter of 11.125 inches or less to fit correctly.
2. Mount Subwoofers: Carefully place each 12-inch subwoofer into its designated cutout on the enclosure. Align the mounting holes and secure the subwoofers using appropriate screws. Do not overtighten.
3. Connect Wiring: Connect the positive (+) and negative (-) terminals of each subwoofer to the corresponding terminals on the enclosure's spring-loaded terminal cups. Ensure a secure and correct polarity connection.

Figure 3: Front view of the enclosure with subwoofer cutouts and terminal cups.

Figure 4: Enclosure construction details including terminal cups.

2.4 Enclosure Placement in Vehicle

The Atrend Bbox A184-12CP is designed for under-seat placement in compatible Chevrolet/GMC Crew Cab trucks. Carefully slide the enclosure into position under the rear seat. Ensure that the enclosure is stable and does not interfere with any vehicle mechanisms or wiring. The design includes specific contours to accommodate the vehicle's floorplan.

Important: Verify that the installed subwoofers do not make contact with the vehicle's floor or seat when the seat is lowered. Adjustments to the enclosure's height (e.g., adding risers) may be necessary depending on the specific subwoofer model and vehicle configuration to ensure adequate clearance and optimal sound performance.

Figure 5: Enclosure installed under a truck's rear seat.

Figure 6: Subwoofers installed in the enclosure under the rear seat.

3. Operation

3.1 Initial Power-Up and Testing

Once the enclosure and subwoofers are installed and wired to your amplifier, perform an initial power-up. Start with the amplifier gain set to its lowest level. Gradually increase the volume on your head unit and then slowly adjust the amplifier gain until the desired bass level is achieved without distortion.

3.2 Audio System Integration

For optimal performance, adjust your amplifier's crossover settings. A low-pass filter (LPF) is typically used for subwoofers, allowing only low frequencies to pass through. Consult your amplifier's manual for specific recommendations on crossover frequencies and gain settings to match your subwoofers and overall audio system.

4. Maintenance

Regular maintenance helps ensure the longevity and performance of your subwoofer enclosure.

• Cleaning: Use a soft, dry cloth or a vacuum cleaner with a brush attachment to gently clean the carpeted exterior of the enclosure. Avoid using harsh chemicals or excessive moisture.
• Connection Checks: Periodically inspect all wiring connections to the subwoofers and amplifier. Ensure they are secure and free from corrosion. Loose connections can lead to poor sound quality or system damage.
• Physical Inspection: Check the enclosure for any signs of damage, such as cracks, loose panels, or tears in the carpeting. Address any issues promptly to maintain the enclosure's airtight integrity.

5. Troubleshooting

5.1 Common Issues and Solutions

• No Sound from Subwoofers:
  • Check all wiring connections from the amplifier to the enclosure and from the enclosure to the subwoofers. Ensure correct polarity.
  • Verify the amplifier is powered on and receiving a signal from the head unit.
  • Check amplifier settings (gain, crossover, bass boost).
• Distorted Sound:
  • Reduce the amplifier gain.
  • Check for loose wiring connections or damaged speaker wires.
  • Ensure subwoofers are not over-driven.
• Poor Fitment or Rattling:
  • Ensure the enclosure is correctly positioned under the seat and not obstructed.
  • Verify that the subwoofers are not making contact with the vehicle's floor or seat. If necessary, consider adding risers to the enclosure.
  • Check for any loose items in the vehicle that might be rattling.

6. Product Specifications

Figure 7: Precision engineering and construction details.

7. Important Safety Information

WARNING: This product can expose you to chemicals including wood dust, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.

Always ensure proper ventilation during installation and operation. Avoid exposing the enclosure to excessive moisture or extreme temperatures. Secure the enclosure properly in the vehicle to prevent movement during driving.

8. Warranty Information

The Atrend Bbox A184-12CP Subwoofer Enclosure comes with a limited warranty. For specific details regarding warranty coverage, terms, and conditions, please refer to the official Atrend website or contact their customer support directly. Keep your proof of purchase for warranty claims.

9. Customer Support

For further assistance, technical support, or inquiries regarding your Atrend Bbox A184-12CP subwoofer enclosure, please visit the official Atrend website or contact their customer service department. Contact information can typically be found on the manufacturer's website.

Atrend Official Website: www.atrendusa.com (Example link, actual link may vary)