Installing your SW 11 ACTIVE spare-wheel-subwoofer involves a few key steps to ensure optimal performance. First, let's address the power connections. Begin by disconnecting your vehicle's power supply by removing the ground cable from the battery. Next, connect the GND (ground) terminal of the amplifier to the car chassis, using a short cable (no longer than 50 cm) with a suitable cross-section (AWG size 6 - 10). Then, connect the +12V contact of the amplifier to the supply cable via a fuse directly to the vehicle battery, using a high-quality fuse holder and a cable no longer than 30 cm. Optionally, connect the REM-terminal of the amplifier to the remote output of your head unit using a 0.5 - 1.5 mm power cable. For the RCA/Speaker connection, if your car radio has RCA outputs, use the RCA LOW-LEVEL inputs to connect the subwoofer to the pre-output connection of your head unit using an RCA cable. Connect the remote input (usually a blue wire) to the remote or antenna output of the head unit. If your car radio doesn't have RCA outputs, connect the speaker outputs directly to the HIGH-LEVEL inputs of the subwoofer; the amplifier will then turn on automatically via the remote wire. Troubleshooting is also important. If the amplifier doesn't power up and no LED is lit, check the ground connection, +12V power cable, remote cable, and fuses. If the protection LED illuminates green while there's no sound, inspect the cinch cable, speaker connections, and head unit. If the protection LED turns red upon powering up, check for overheating, short circuits, high input voltage, and impedance issues. Ensure proper airflow if overheating is detected. By following these steps, you'll be well on your way to enjoying enhanced bass from your SW 11 ACTIVE spare-wheel-subwoofer.
