Focal ISUBACTIVE 8" Underseat Amplified Subwoofer Instruction Manual

1. Introduction

The Focal ISUBACTIVE amplified subwoofer is designed to enhance your vehicle's audio system by providing powerful and dynamic bass. This compact unit integrates seamlessly into various vehicle interiors, typically under a seat, without compromising cabin or trunk space. It connects directly to your car radio's speaker outputs using the included Plug & Play ISO cable, simplifying installation.

2. Safety Information

Please read 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.

• Professional Installation Recommended: Installation of car audio equipment can be complex. If you are unsure about any step, seek assistance from a qualified professional.
• Power Disconnection: Always disconnect the vehicle's negative battery terminal before beginning any electrical work to prevent short circuits.
• Wiring: Ensure all wiring is correctly routed and secured to prevent damage from moving parts or heat. Use appropriate gauge wires for power and ground connections.
• Ventilation: Ensure the subwoofer has adequate ventilation. Do not block any vents or place the unit in an enclosed space where heat cannot dissipate.
• Volume Levels: Prolonged exposure to high volume levels can cause hearing damage. Adjust volume responsibly.

3. Package Contents

Verify that all items are present in the package:

• Focal ISUBACTIVE Amplified Subwoofer Unit
• Plug & Play ISO Cables
• Remote Control (if applicable, based on model variant)
• Mounting Hardware (screws, brackets)
• User Manual (this document)

4. Product Overview

Familiarize yourself with the various components and controls of your ISUBACTIVE subwoofer.

Figure 1: Top view of the Focal ISUBACTIVE subwoofer, highlighting the main speaker grille and the rear panel with various connections and controls.

Figure 2: Detailed view of the power input terminals (GND, REM, +12V), fuse, High-Level inputs, Low-Level (RCA) inputs, Remote Control port, and Speaker Outputs.

Figure 3: Detailed view of the audio adjustment controls including Gain, Subsonic filter, Bass-Boost, Low-Pass filter, Phase switch, and Power Status LED.

Control Panel Features:

• POWER (GND, REM, +12V): Terminals for ground, remote turn-on, and 12V power supply.
• FUSE: Integrated fuse for circuit protection.
• HI LEVEL: High-level speaker input for direct connection to car radio speaker outputs. Includes an AUTO TURN ON switch.
• LOW LEVEL (RCA): Low-level RCA input for connection to car radio pre-outs.
• REMOTE CONTROL: Port for connecting an optional wired remote control for bass level adjustment.
• OUTPUTS SPEAKERS: Speaker outputs for connecting additional speakers (if applicable to specific model variant).
• GAIN (Min. - Max.): Adjusts the input sensitivity to match the output of your car radio.
• SUBSONIC (20Hz - 50Hz): High-pass filter for the subwoofer, removing ultra-low frequencies that are inaudible and can waste amplifier power.
• BASS-BOOST (0 - +18dB): Adjusts the bass level at a specific frequency.
• LOW-PASS (50Hz - 180Hz): Low-pass filter for the subwoofer, allowing only frequencies below the set point to pass through.
• PHASE (0° - 180°): Adjusts the phase of the subwoofer output to match the main speakers, improving bass integration.
• POWER STATUS: LED indicator (Green for Power, Red for Protect).

5. Setup and Installation

Proper installation is crucial for optimal performance and safety. Follow these steps carefully.

5.1 Placement

The ISUBACTIVE subwoofer is designed for compact integration, typically under a car seat. Ensure the chosen location allows for:

• Adequate air circulation around the unit to prevent overheating.
• Secure mounting to prevent movement during vehicle operation.
• Easy access to controls for initial setup and adjustments.

5.2 Wiring Connections

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

1. Power Connection (+12V): Connect a suitable gauge power cable from the vehicle's positive battery terminal (with an inline fuse located within 18 inches of the battery) to the +12V terminal on the subwoofer.
2. Ground Connection (GND): Connect a suitable gauge ground cable from the GND terminal on the subwoofer to a clean, unpainted metal surface on the vehicle chassis. Ensure a good electrical contact.
3. Remote Turn-On (REM): Connect a remote turn-on wire from your car radio's remote output to the REM terminal on the subwoofer. If using High-Level inputs with the AUTO TURN ON feature, this connection may not be necessary.
4. Signal Input:
   • High-Level Input (Speaker Level): Use the supplied Plug & Play ISO cable to connect to your car radio's speaker outputs. Ensure correct polarity. Set the AUTO TURN ON switch to 'ON' if you want the subwoofer to power on automatically with the radio.
   • Low-Level Input (RCA): If your car radio has RCA pre-outs, connect RCA cables from the radio to the LOW LEVEL (RCA) inputs on the subwoofer.
5. Remote Control (Optional): If using a wired remote control, connect it to the REMOTE CONTROL port.
6. Speaker Outputs (Optional): If your model variant includes speaker outputs, connect your additional speakers here, observing polarity.

Once all connections are made, reconnect the vehicle's negative battery terminal.

6. Operating Instructions

After installation, follow these steps to configure your subwoofer for optimal sound.

6.1 Initial Power-Up and Gain Adjustment

1. Turn on your car radio. The subwoofer's POWER STATUS LED should illuminate green. If it's red or off, refer to the Troubleshooting section.
2. Set the GAIN control on the subwoofer to its minimum position.
3. Play a piece of music with a good bass presence through your car radio.
4. Slowly increase the volume on your car radio until it reaches about 75% of its maximum level, or just before distortion becomes audible from your main speakers.
5. Gradually increase the GAIN control on the subwoofer until the bass blends smoothly with your main speakers without overpowering them or sounding distorted.

6.2 Adjusting Audio Controls

• LOW-PASS Filter (50Hz - 180Hz): This control determines the highest frequency the subwoofer will reproduce. Start by setting it around 80-100Hz. Adjust it to blend the subwoofer's output with your main speakers. If your main speakers are small, you might set it higher; if they are large, you might set it lower.
• SUBSONIC Filter (20Hz - 50Hz): This high-pass filter for the subwoofer removes very low, inaudible frequencies. Setting it around 25-30Hz can improve efficiency and prevent damage from extreme low-frequency content.
• BASS-BOOST (0 - +18dB): Use this control sparingly to add a slight emphasis to the bass if desired. Excessive boost can lead to distortion.
• PHASE (0° - 180°): This switch helps integrate the subwoofer's output with your main speakers. Listen to music with strong bass and switch between 0° and 180°. Choose the setting that provides the most impactful and cohesive bass response.

7. Maintenance

The Focal ISUBACTIVE subwoofer requires minimal maintenance.

• Cleaning: Use a soft, dry cloth to clean the exterior of the unit. 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 that the area around the subwoofer remains clear of obstructions to maintain proper airflow.

8. Troubleshooting

If you encounter issues with your ISUBACTIVE subwoofer, refer to the following table before contacting support.

9. Specifications

Technical specifications for the Focal ISUBACTIVE 8" Underseat Amplified Subwoofer.

10. Warranty Information

This Focal ISUBACTIVE subwoofer comes with a limited warranty. The specific terms and duration of the warranty may vary by region and retailer. Please retain your proof of purchase for warranty claims. For detailed warranty information, refer to the documentation provided with your product or visit the official Focal website.

11. Customer Support

For further assistance, technical support, or service inquiries, please contact your authorized Focal dealer or visit the official Focal website for contact information in your region.

Focal Official Website: www.focal.com