How to Install a Powered Subwoofer to a Factory Stereo

If you’re looking to improve the sound quality in your car, adding a powered subwoofer can be a great way to do it. Installing a powered subwoofer to a factory stereo can be a daunting task.

It is often difficult to find the space to install a subwoofer in most vehicles, and wiring it up properly can be a challenge for even the most experienced car audio enthusiasts.

In this article, we will walk you through the process of installing a powered subwoofer to your factory stereo system. We will provide tips on finding space for the subwoofer, as well as instructions on how to wire it up properly. Let’s get started!

How to Properly Install a Subwoofer in 8 Easy Steps:

How to Install a Powered Subwoofer to a Factory Stereo guide

The steps of adding a subwoofer to a factory stereo are quite easy to keep track of. There’s no need to be concerned. You should be OK if you just follow along.

Step 01: Collect all of the equipment you’ll need.

This is a list of everything you’ll need to do it:

  • Speaker for subwoofers
  • Amplifier
  • Subwoofer box
  • Basic tools
  • Some speaker wire
  • Wire harness kit

Step 02: Choose a speaker and an amplifier to go with it:

The key to getting the most out of your audio system is understanding how power consumption works. Speakers and amplifiers can only run at full capacity for about a minute before they overheat or burn out, so it’s important that you know what kind (RMS) rating each component has rather than just looking on paper when buying new gear.

Step 03: Remove the car battery:

If you have ever had any doubts about the safety of your home, this is for sure going to be an issue. And it’s not just because we’re talking about electricity here; all items in our daily lives depend on a stable power supply too.

Step 04: Disconnect the speaker’s wiring:

If you have a car, then this is for sure the most important step in fixing your vehicle. Simply disconnect its power source and turn it off before physically unplugging wires from their respective ports or terminals.

Step 05: Determine the relevant relationships:

Next, connect the LFE jack on your receiver to one of these ports using an included screw. This will allow you turn down low-frequency sounds like bass frequencies that can sometimes cause interference when they’re too loud for comfort.

Step 06: Run wires

The battery is the most important part of your car. It provides power for everything from windows and lights to heaters, clocks, or meters! Now all you need are some basic tools that every mechanic has handy in their kit; plus an extra pair of hands so they can work on both ends at once while using pliers as needed throughout this process.

Then, attach the in-line fuse to this terminal. Run the remaining wire beneath the vehicle’s carpeting or through a wire channel if one exists, and connect it at your trunkline with an orange (or other colored) screw fitting that you will see on both sides of car seats as well as some older models.

Step 07: Strengthen the connections:

Now it’s time to connect the wires that will power your new subwoofer. The first thing you should do is attach two positive terminals from different parts of this speaker system together using an (+) sign, one negative connection on each terminal where they meet in front or behind their respective cabinets if applicable (not both).

Step 08: Connect the speaker cable to the battery and then plug it in:

The final step in setting up your new sound system is to connect the power and speaker cables. Make sure you use a high-quality wire (such as oxygen-free) for both of these connections so they don’t give out on ya soon afterward.

How to Install a Powered Subwoofer to a Factory Stereo?

Step 01: Disconnect the battery

When working on electrical equipment, like cars for example – it goes without saying that you must disconnect the negative battery terminal before beginning any operations. This will ensure the safety of yourself and others around who may be affected by what’s happening within your workspace or vehicle.”

Step 02: Join the power wires together

A firewall is a perfect place for your power connection. It will keep everything cool and protect the wiring from unwanted interference!

Step 03: Connect the power and signal cords:

Next, you’ll need to run the power and signal lines. You can do this with a line output converter because most factory stereos don’t have preamp outputs!

Step 04: Attach the ground wire

When connecting the ground wire to your car, make sure that you attach it with a Bolt. The metal should be touching both ends of this termination for maximum effectiveness!

Step 05: Make wiring connections

The amp should be turned down so that it doesn’t overheat. Put your powered subwoofer back together and try turning on the power again, this time with lower gains enabled.”

After following these steps, you will know how to install a subwoofer in your car.

If you want to know how to wire a car stereo without a harness? Then click here to read.

How To Add Subwoofer To Stock Stereo?

There are two methods for adding a subwoofer to a stock radio:

Hi-Low Converter

You can receive authentic sound quality from your subwoofers with this simple little device. All you need is an RCA input and speaker wires that connect into it, so not only will they be louder but also better sounding!

Line-out converter

The best way to enjoy music in your car is with a line-out converter. It will allow you the option of having great sound while preserving what’s already there, and also comes at an affordable price!

Safety Tips and Reminders

Although adding a subwoofer to your factory stereo is simple, there are a few safety precautions you should take.

  • Use insulator gloves: If you want to make sure that your hands are safe when installing this, use an extension cord. This will also help avoid any accidents from happening during installation and keep everyone around safe too!
  • Stay away from water: Stay away from water sources when handling wires and electricity! Subwoofers are a great conductor of energy so they may cause electrocution if come into contact with moist surfaces like skin or clothes. In addition, you should take care not to Step on these power strip protector plates because it could damage your powered sub’s components even more than before.
  • Don’t forget to install the ground wire: Grounding your electronics is important for safety. Without the ground wire, you risk fire and overheating from potentially dangerous electric currents running through them!


Installing a powered subwoofer to a factory stereo can be an easy process, but there are some safety tips and reminders you should keep in mind. In this blog post, we’ve outlined the 8 easy steps to properly install a subwoofer in your car.

We hope these guidelines will help you get started with adding that extra bass boost to your music. Are you looking for more information on how to choose the right subwoofer for your car? Check out our other blog posts for more tips and advice. Thanks for reading!

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