Test the speaker. Now that you’ve connected the speaker, it’s important to test the connection so you don’t have to troubleshoot later and waste time! Reconnect the negative terminal of the battery and turn on the radio or car stereo. Listen to the sound of your new speaker or watch for any noticeable vibrations at high volume. If it doesn’t work, there is a problem with the electrical connection.
Plug in the new speaker. Attach the new speaker. Once you are sure that the speaker is working properly, fix it in its socket on the door or dashboard. If you’re lucky, the new speaker will fit into the original compartment. However, you may need to install a special mounting bracket (usually included), drill new screw holes, and/or use an adhesive system to secure it. Refer to the instructions that came with the speaker.
Install and test each subwoofer. Subwoofers (or subwoofers) are responsible for those deep, boomy, low-frequency sounds that some car owners love. If your car came with subwoofers, installing them again can be as easy as placing them in the existing compartment and plugging them into the car’s wiring. However, if your car didn’t come with subwoofers, or if you want to install additional subwoofers, your task can be much more difficult. You may need to enlarge existing mounting holes for your stock woofers or make significant modifications to the car to accommodate large speakers. For example, many people who want to add multiple woofers to their car customize and install a speaker support panel in the trunk.
Subwoofers often have very high power requirements and complex wiring systems. You can purchase and install a separate amplifier wiring kit to simplify the process of wiring your speakers.
Otherwise, you may need to connect the woofer directly to the battery and car stereo system and make the ground connection manually.