(DIY) How To Install Car Subwoofer With Diagrams

Installing A Subwoofer To Your Car

Most factory car sound systems don’t have a subwoofer, which is a severe problem if you want the best sound quality. Without a subwoofer the sound in your car will be incomplete.

This affects lower frequencies the most, so the bass won’t be very good. On the other side, adding a subwoofer is treated as the most important car sound system upgrade you can make.

Related: How to Install Car Amplifier With Diagrams

Even better, the installation process is simple, and you don’t need to hire a professional to do it. Keep in mind that removing the battery from your car is recommended.

How To Install Car Subwoofer


  • A subwoofer and its enclosure.
  • Speaker wires and strippers.
  • Velcro and polyfil are optional.

How To Install Car Subwoofer

How To Install Car Subwoofer
image source: sonicElectronix
  1. Wiring the subwoofer

The impedance has the most important role here and it is mandatory to connect a subwoofer to a correct impedance.

Due to the fact this step depends on a subwoofer and it is different for most devices, you will have to follow the instructions.

Keep in mind that connecting a subwoofer poorly, can cause damage and you will ruin a brand new device.

One example is more than useful. If you use 500 watt subwoofer, connect it so the amplifier sends 500 watts of RMS.

  1. Place the subwoofer in the box

The next step involves placing a subwoofer in its box. This must be done after you have connected impedance. Then, connect positive and negative wires to the terminals on the subwoofer.

When you complete this step, line the entire box with polyfill. Keep in mind that this is a recommended step, but it isn’t mandatory.

Now, all you need to do is to fix the box. Don’t forget that it shouldn’t be too tight, but it should have a lot of free space, due to the fact this affects the sound quality. In addition, a subwoofer must be perfectly lined down. If it isn’t, correct this issue as soon as possible.

  1. Connect the amplifier to the subwoofer

This is the easiest step. All you need to do is to connect positive and negative wires to the amplifier. It is recommended to check this step two times, due to the fact the wrong wiring can cause severe issues.

  1. Setting up the subwoofer

When you complete all steps from the list, your job isn’t done. A subwoofer isn’t properly set, so your sound quality won’t be special.

You will have to tune up the bass boost, frequency response, gain and additional parameters. The main goal is to get a sound quality that offers impressive frequencies.

Installing Amplifier and Subwoofer from Start to Finish [In 10 Minutes]

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