Introduction:

Wiring an amplifier to a head unit and subwoofer can be a tricky task, but with the right technique and tools, you can have a seamless connection in no time. In this article, we will discuss three different methods for wiring an amp to a sub and head unit.

1. The Line Level Converter Method

This method is ideal if your head unit does not have dedicated RCA outputs for subwoofers but has built-in amplification. A line level converter allows you to tap into the speaker wire outputs and convert them into RCA outputs suitable for an external amplifier.

Step-by-Step:

a. Identify the speaker wires running from your head unit.

b. Using a multimeter, identify the positive and negative wires for each speaker.

c. Connect the line level converter’s wires to each of these pairs correctly – positive to positive, negative to negative.

d. Connect the RCA cables from the line level converter’s outputs to your amplifier’s inputs.

e. Connect your subwoofer speaker wires to the corresponding output terminals on your amplifier.

f. Finish up by connecting power cables, remote control wire, and grounding wire as specified in your amplifier’s installation manual.

2. The High-Level Input Method (Speaker-Level Input)

If your amplifier has built-in high-level input capability, you can connect your factory speaker wires directly without using a line level converter. This method works well in vehicles with factory-installed amplified systems.

Step-by-Step:

a. Locate your high-level input harness provided in your amplifier kit.

b. Using a multimeter, identify the positive and negative wires for each speaker coming from your head unit.

c. Connect these correctly (positive to positive/negative to negative) using wire connectors or soldering them together.

d. Following your high-level input harness adapter’s instructions, plug it into the amplifier’s high-level input connector.

e. Connect your subwoofer speaker wires to the corresponding output terminals on your amplifier.

f. Complete installation by connecting power cables, remote control wire, and grounding wire as specified in your amplifier’s installation manual.

3. The RCA Pre-Out Method

This is the most straightforward method if your head unit has dedicated RCA pre-outs for subwoofers, making it easier to connect both the amp and the sub.

Step-by-Step:

a. Plug an RCA cable into the subwoofer pre-out on the back of your head unit.

b. Run this cable through the vehicle’s interior to your amplifier location.

c. Connect the RCA cable to the input terminals on your amplifier.

d. Connect your subwoofer speaker wires to the corresponding output terminals on your amplifier.

e. Finish up by connecting power cables, remote control wire, and grounding wire as specified in your amplifier’s installation manual.

Conclusion:

Understanding how to wire an amp to a sub and head unit is crucial to achieving high-quality sound in your vehicle. The three methods described above cater to different setups and situations to ensure that you can achieve a seamless connection regardless of limitations in your head unit or existing audio equipment. Happy car audio installations!