How to Install a Mono Amplifier in Your Car

Quick answer

Installing a mono amplifier involves connecting power, ground, remote, and signal cables, then mounting the amp and tuning the gain. Follow the steps below for a clean, safe install.

Step-by-step mono amplifier installation

1. Disconnect the battery: Disconnect the negative terminal of your car battery to prevent shorts during installation. Common mistake: Forgetting to disconnect the battery can cause a short or damage the amp.
2. Run the power wire: Route a power cable (4 AWG or thicker for high-wattage amps like the Kicker 49WXA3600) from the battery to the amplifier location. Use a grommet when passing through the firewall. Checkpoint: Ensure the power wire is fused within 18 inches of the battery.
3. Connect the ground wire: Attach a ground wire of the same gauge to a clean, unpainted metal surface on the chassis, as close to the amp as possible. Common mistake: Grounding to a painted bolt or seat belt anchor can cause noise or poor performance.
4. Run signal and remote wires: Route RCA cables from your head unit to the amp, and run a remote turn-on wire (usually blue) from the head unit's remote output to the amp's remote terminal. Checkpoint: Keep RCA cables away from power wires to avoid alternator whine.
5. Mount the amplifier: Secure the amplifier to a flat surface (like the trunk floor or a subwoofer box) using screws or mounting brackets. Ensure the cooling fans have clearance. Common mistake: Mounting the amp upside down or in a tight space can cause overheating.
6. Connect speakers and set gain: Wire the subwoofer(s) to the amp's speaker terminals, then set the gain using a multimeter or by ear with a test tone. For the Kicker 49WXA3600, use the competition mode switch to lock the gain setting. Checkpoint: Start with gain low and increase slowly to avoid clipping.
7. Reconnect battery and test: Reconnect the negative battery terminal, turn on the system, and check for sound. Adjust crossover and bass boost as needed. Common mistake: Crank the volume before checking for distortion—always test at low volume first.

Product spotlight

• Kicker 49WXA3600 3600 Watt Class D Mono Amplifier: Full-bridge Class-D design with quad micro-controller-regulated cooling fans. This keeps the amplifier running cooler during extended bass sessions, reducing the risk of thermal shutdown.

  

• Kicker 49WXA3600 3600 Watt Class D Mono Amplifier: Competition mode switch to avoid potentiometer creep and fix crossover settings. Once you set the gain and crossover, the switch locks them in place so they don't drift from vibration—important for consistent sound quality.