How to Hook Up an Amplifier to Separate a Battery in Your Car

Written by william kinsey
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How to Hook Up an Amplifier to Separate a Battery in Your Car
Having a separate battery for the amplifier can keep you from getting stranded. (dead battery image by Katrina Miller from Fotolia.com)

High-power sound systems require a lot of power. In an automobile, that power has to come from the battery and alternator. When the engine is not running, all of the power for the radio and amplifiers has to come from the battery, which can quickly drain it. A solution to this problem is to install a second battery and connect the amplifier to the second battery. This reduces the possibility of not being able to start your car due to a dead battery. This article assumes that the second battery is already installed and that the negative terminal of the second battery is already connected to the car frame. It also assumes that all speaker and radio connections have been made.

Skill level:
Moderate

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Things you need

  • Amplifier
  • Amplifier wiring kit
  • Wire cutters
  • Wire stripper

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Instructions

  1. 1

    Strip 1/2 of an inch of insulation off one end of the red power wire. Connect that end of the red power wire to the positive power terminal of the amplifier. Connect the other end of the red power wire to the positive terminal of the second battery.

  2. 2

    Strip 1/2 of an inch of insulation off one end of the black ground wire. Connect that end of the black ground wire to the ground terminal of the amplifier. Connect the other end of the ground wire to the car's metal frame.

  3. 3

    Connect the one end of the remote wire to the remote terminal on the amplifier. Connect the other end of the remote wire to the radio remote wire if the radio is equipped with a radio remote wire for controlling amplifiers. If the radio does not have a remote wire, then connect the other end of the remote wire to one terminal of a simple 12-volt switch. Connect the other switch terminal to the positive terminal of the second battery.

  4. 4

    Test the amplifier by turning the sound system on without starting the car.

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