How to Install the Kicker Subaru Sub 2018 STI: A Comprehensive Guide

Are you looking to add some powerful and impressive bass to your Subaru STI? Then, you might want to consider installing the Kicker Subaru Sub 2018 STI. This high-quality subwoofer delivers an incredible sound experience that will make all your favorite tunes sound even more amazing.

But, if you are new to installing car stereos, don’t worry. In this article, we will guide you through the installation process step-by-step. With a little bit of patience and the right tools, you can have your Kicker Subaru Sub 2018 STI installed and pumping out the bass in no time!

Key Takeaways

  • The Kicker Subaru Sub 2018 STI is a powerful subwoofer that can significantly enhance your car’s sound system.
  • Installing the subwoofer requires some basic knowledge of car stereo installation and the right tools.
  • The installation process involves removing the trunk liner, mounting the subwoofer, running power and ground wires, and connecting the subwoofer to the stereo system.

Tools You Will Need

Before you start the installation process, make sure you have the following tools at hand:

  • Socket wrench set
  • Screwdrivers (Phillips and flathead)
  • Wire cutters
  • Wire stripper
  • Crimping tool
  • Electrical tape
  • Soldering iron
  • Heat shrink tubing
  • Multimeter
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Installation Steps

Now that you have your tools ready, let’s start the installation process:

Step 1: Remove the Trunk Liner

Start by removing the trunk liner from your Subaru STI. You can do this by unscrewing the plastic clips that hold it in place. Be careful not to damage the clips, as you will need them to reattach the liner later.

Step 2: Mount the Subwoofer

Take the Kicker Subaru Sub 2018 STI and position it in the trunk where you want it to be mounted. Make sure it is securely mounted, as it will be vibrating when it is in use. Use screws to attach the subwoofer to the car’s metal frame, making sure that the screws are tight enough to hold the subwoofer in place.

Step 3: Run Power and Ground Wires

Next, you need to run power and ground wires from your car’s battery to the subwoofer. You will need to use a multimeter to identify a good ground point and connect the ground wire to it. Then, run the power wire from the battery to the subwoofer, making sure to use a fuse holder to protect the subwoofer and your car in case of a short circuit.

Step 4: Connect the Subwoofer to the Stereo System

Now that you have mounted the subwoofer and run the power and ground wires, it’s time to connect the subwoofer to the stereo system. You will need to identify the wires that connect the stereo system to the speakers and splice in the wires that connect to the subwoofer. Use wire cutters to strip the insulation off the wires, and then use a crimping tool to attach the wires to the subwoofer. Use electrical tape to secure the connections, and test the subwoofer to make sure it is working properly.

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Step 5: Reattach the Trunk Liner

Once you have completed all the previous steps, it’s time to reattach the trunk liner to your Subaru STI. Make sure that all the plastic clips are properly secured, and that the liner is snugly in place. Then, test the subwoofer again to make sure it is functioning properly.

Congratulations! You have successfully installed your Kicker Subaru Sub 2018 STI!


Do I need an amplifier to use the Kicker Subaru Sub 2018 STI?

Yes, you will need an amplifier to power the subwoofer. You can choose to install a separate amplifier or use an amplifier that is built into your stereo system.

Can I install the subwoofer myself, or should I hire a professional?

If you have some basic knowledge of car stereo installation and the right tools, you should be able to install the subwoofer yourself. However, if you are unsure about any aspect of the installation process, or if you are not comfortable working with car electronics, it’s always a good idea to hire a professional.

What kind of bass response can I expect from the Kicker Subaru Sub 2018 STI?

The Kicker Subaru Sub 2018 STI is designed to deliver powerful and clear bass response. With its 10-inch subwoofer and 200-watt amplifier, you can expect a deep, rich bass sound that will make all your favorite music sound amazing.


Installing the Kicker Subaru Sub 2018 STI is a great way to enhance your car’s sound system and enjoy your music to the fullest. With the right tools and a little bit of know-how, you can have your subwoofer installed and pumping out the bass in no time. We hope this guide has been helpful, and that you enjoy your new sound system!

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Alton Brobst

As a longtime Subaru enthusiast, Alton brings a wealth of knowledge and experience to our blog. From his early days of tinkering with engines to his current role as a certified Subaru technician, Alton has seen it all when it comes to Subarus. When he's not working on cars, he enjoys hiking and exploring the great outdoors.

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