\u00a9 2021 wikiHow, Inc. All rights reserved. Generally, the positive wire will be red and the negative will be black. Here you will some basic instructions about how to install a car audio amplifier. I think the small amp/NVX speaker is a great way to go and makes for an easier DIY installation all around. Put on your favorite CD and turn up the volume. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Installing a subwoofer in your vehicle provides power and balance to any car stereo system. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Without it, you will not know there is a problem until it is too late. Don't be afraid to go higher than you normally would, but we aren't talking “blow out your eardrums” high. The installation kit should come with butt connectors, but you can buy them at a hardware store if yours doesn’t. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Ok i have the basics installed, i have the cable from the battery to the amp, the ground, and the turn on cable. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/a6\/Install-Car-Audio-Amplifiers-Step-1.jpg\/v4-460px-Install-Car-Audio-Amplifiers-Step-1.jpg","bigUrl":"\/images\/thumb\/a\/a6\/Install-Car-Audio-Amplifiers-Step-1.jpg\/aid1281919-v4-728px-Install-Car-Audio-Amplifiers-Step-1.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":485,"licensing":"