DS18 SQBASSx2 UnderSeat Slim Amplified Car/Truck Subwoofer Instruction Manual

Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of your DS18 SQBASSx2 UnderSeat Slim Amplified Car/Truck Subwoofer. Please read this manual thoroughly before attempting installation or operation to ensure proper function and to prevent damage.

The DS18 SQBASSx2 is designed to deliver powerful bass in compact spaces, making it suitable for various vehicle types including cars and trucks. It features an integrated amplifier and a passive radiator for enhanced low-frequency response.

Safety Information

• Always disconnect the vehicle's battery negative terminal before starting any electrical work.
• Ensure all wiring is properly routed and secured to prevent pinching, cutting, or short-circuiting.
• Use appropriate gauge wiring for power and ground connections as specified in the installation section.
• Do not mount the subwoofer in a location that obstructs vehicle operation or safety devices.
• Avoid exposing the unit to excessive moisture or extreme temperatures.
• If you are unsure about any part of the installation process, consult a professional car audio installer.

Package Contents

Verify that all items are present in the package:

• DS18 SQBASSx2 Amplified Subwoofer Unit
• Remote Bass Knob with 5m Cable
• Mounting Hardware (screws, brackets)
• Wiring Harness (Power, Ground, Remote, Speaker Level Input)
• User Manual (this document)

Product Features

The DS18 SQBASSx2 subwoofer offers the following key features:

• Integrated Amplifier: Provides 230W RMS / 1200W Peak power.
• Compact Design: 7x9 inch woofer with a 4x6 inch passive radiator, ideal for under-seat installation.
• Adjustable Low Pass Filter: 50-150 Hz for precise bass tuning.
• Remote Bass Knob: Allows convenient bass level adjustment from the driver's seat.
• Multiple Input Options: Supports both RCA and speaker-level inputs.
• Durable Construction: Polypropylene diaphragm and rubber surround for longevity and clear sound.

Installation

1. Mounting Location

Select a suitable mounting location, typically under a seat, ensuring adequate clearance and ventilation. The unit dimensions are 308 x 200 x 71mm (approximately 12.1 x 7.9 x 2.8 inches). Ensure the location does not interfere with vehicle controls or wiring.

2. Wiring Connections

Before making any connections, disconnect the vehicle's negative battery terminal.

• Power (B+ / +12V): Connect the +12V terminal to the positive terminal of the vehicle's battery using a suitable gauge power cable (e.g., 8 AWG or 10 AWG). Install an in-line fuse (e.g., 20A) within 18 inches of the battery.
• Ground (GND): Connect the GND terminal to a clean, unpainted metal surface of the vehicle chassis. Ensure a good electrical connection.
• Remote Turn-On (REM): Connect the REM terminal to the remote output of your head unit. This wire turns the subwoofer on and off with your car stereo.
• Audio Input:
  • RCA Input: If your head unit has RCA pre-outs, connect them to the RCA INPUT (CH1, CH2) on the subwoofer.
  • Speaker Level Input: If your head unit does not have RCA outputs, use the provided speaker level input harness. Connect the vehicle's speaker wires to the corresponding inputs on the harness.

3. Remote Bass Knob Installation

Mount the remote bass knob in a convenient location within reach of the driver. Connect the 5-meter cable from the remote knob to the "REMOTE" port on the subwoofer unit.

Operation

1. Initial Power On

After all connections are made and secured, reconnect the vehicle's negative battery terminal. Turn on your car stereo. The subwoofer should power on automatically via the remote turn-on wire.

2. Adjusting Controls

• GAIN: This control matches the input sensitivity of the subwoofer to the output of your head unit. Start with the gain at minimum, then slowly increase it until you achieve a balanced sound without distortion.
• FREQ (Low Pass Crossover): This knob sets the upper frequency limit for the subwoofer, ranging from 50Hz to 150Hz. Adjust it to blend the subwoofer's output smoothly with your main speakers. A common starting point is 80-100Hz.
• PHASE BOOST (0°/180°): This switch adjusts the phase of the subwoofer's output relative to your main speakers. Experiment with both settings to find the one that provides the most impactful and cohesive bass response.
• SUB REM (Remote Bass Knob): The remote bass knob allows you to adjust the subwoofer's output level from the driver's seat, providing a range of 0 to -30dB.

Note: Make small adjustments and listen carefully to the sound to achieve optimal performance.

Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the subwoofer. Do not use harsh chemicals or abrasive cleaners.
• Inspection: Periodically check all wiring connections to ensure they are secure and free from corrosion.
• Ventilation: Ensure the subwoofer has adequate airflow around it to prevent overheating. Do not block any vents.

Troubleshooting

Specifications

Warranty and Support

This product comes with a limited manufacturer's warranty. For specific warranty terms and conditions, please refer to the warranty card included with your product or contact DS18 customer support.

For technical assistance or support, please visit the official DS18 website or contact their customer service department. Keep your purchase receipt as proof of purchase for warranty claims.