Car Accessories and Gadgets

How To Wire A Subwoofer In A Car


How To Wire A Subwoofer In A Car: In the world of car audio, the addition of a subwoofer can be a game-changer. A well-wired subwoofer can take your music from ordinary to extraordinary by delivering deep, powerful bass that you can feel as much as you hear. Whether you’re a music enthusiast, an audiophile, or simply someone who enjoys a dynamic audio experience while driving, wiring a subwoofer into your car can elevate your listening adventures to new heights. Subwoofers are specialized speakers designed to reproduce low-frequency bass sounds.

By offloading the task of reproducing low-frequency bass to a subwoofer, your main speakers can focus on midrange and high-frequency sounds. This specialization can result in cleaner, more detailed audio across the entire frequency range, enhancing overall sound quality. Subwoofers set to create a sense of immersion in music, movies, and gaming by reproducing the deep and rumbling bass effects. This makes your car audio experience more dynamic and captivating.

Wiring a subwoofer allows you to fine-tune its performance to your preferences and the acoustics of your car’s interior. You can adjust settings like gain, crossover frequency, and bass boost to achieve the perfect bass balance. Subwoofers make long drives, road trips, and daily commutes more enjoyable by providing a captivating audio experience. Your car becomes a personal concert venue, enhancing the entertainment value of your journeys.

How To Wire A Subwoofer In A Car

What wire do I need for car subwoofer?

The signal and power coming out of your amplifier must not be impeded on their way to your speakers and subs. When you replace or run new speaker wiring, we recommend using: 18-, 16-, or 14-gauge wires for speakers. 16-, 14-, or 12-gauge wires for subwoofers.

Power Wire (Positive and Negative): These wires supply electrical power from your car’s battery to the subwoofer amplifier. The gauge (thickness) of the power wire depends on the amplifier’s power requirements. For small amplifiers, 8-10 gauge wire is typically sufficient, while larger amplifiers may require 4-6 gauge wire or even thicker.

Remote Turn-On Wire: This wire connects from the car stereo’s remote turn-on lead to the subwoofer amplifier’s remote terminal. It signals the amplifier to turn on and off with the car’s ignition. It’s usually a thin wire, around 18-20 gauge.

Ground Wire: The ground wire connects the subwoofer amplifier to a metal part of your vehicle’s chassis. It provides a path for electrical current to return to the battery’s negative terminal and is essential for the amplifier’s proper functioning. Similar to the power wire, the gauge of the ground wire depends on the amplifier’s power requirements.

What is the best way to connect subwoofer wires?

The optimal connection for a standard powered subwoofer is to use the RCA (Phono) “sub” or “woofer” line out found on home theater receivers and pre-amps. Some subwoofers offer “High Level inputs” (speaker wire connections) for use with a receiver or pre-amp without a sub RCA connection.

Secure and Organize Wires:

  • Use wire ties, split loom tubing, or wire clips to secure and organize the wires along their path. This prevents them from dangling or becoming entangled with other components.

Test the System:

  • Before closing everything up, reconnect the car battery and test the subwoofer system to ensure it’s functioning correctly. Play some music with bass content to verify that the subwoofer is producing sound.

Close Panels and Panels:

  • Once you’ve confirmed that the subwoofer system is working as intended, secure any panels or trim pieces that were removed during the installation.

Can I connect subwoofer to car stereo?

So now you know – it’s definitely possible to install a subwoofer and amplifier to your factory system, and still have it sounding good. If you’d like to know more about how to get a killer system set-up in your car without swapping your stereo, give us a call at 510-527-9888.

Head Unit Compatibility: Check whether your car stereo or head unit has dedicated subwoofer preamp outputs (RCA outputs). Many modern car stereos are equipped with these outputs, making it easy to connect a subwoofer. If your head unit has subwoofer outputs, they are typically labeled as “Subwoofer Out” or “Sub Out.”

Amplification: Subwoofers require power to produce sound. You’ll need an external amplifier to drive the subwoofer. If your car stereo has subwoofer preamp outputs, these should be connected to the subwoofer amplifier’s RCA inputs.

Wiring: You’ll need to run RCA cables from the subwoofer preamp outputs on your head unit to the RCA inputs on the subwoofer amplifier. Additionally, you’ll need to run speaker wires from the amplifier to the subwoofer.

Crossover Settings: Many car stereos with subwoofer outputs also have built-in crossover controls. These controls allow you to set the frequency at which the subwoofer begins to produce bass. It’s important to adjust these settings to match the capabilities of your subwoofer and the acoustics of your car’s interior.

Does a car subwoofer need power?

Your household outlet provides 120volts AC, which is too much as compared to 12volts that your car subwoofer needs. Your car subwoofers can explode if you plug them in the household outlet directly. So, you need DC power to lower the power and to make your car subwoofer work at home.

Audio Source: The audio source, such as a car stereo or head unit, generates an audio signal that includes low-frequency bass information. This signal represents the music or audio content.

Amplifier: The audio signal is sent to an amplifier. The amplifier’s role is to take the low-power audio signal from the source and boost it to a level that can drive the subwoofer. The amplifier provides the necessary electrical power to the subwoofer.

Subwoofer: The amplified audio signal is then sent to the subwoofer. The subwoofer converts the electrical signals into mechanical movement of its cone, creating sound waves that produce deep bass frequencies.

Do I need an amp for a subwoofer?

Powering a subwoofer — Subwoofers require much more power than the typical speakers in a vehicle. A separate amp (or amp channel) is necessary when adding a subwoofer to any audio system.

Power Requirements: Subwoofers require a significant amount of power to produce deep and powerful bass. Car stereos usually have built-in amplifiers designed to power the main speakers but lack the power needed for subwoofers.

Signal Amplification: An amplifier takes the low-power audio signal from your car stereo and boosts it to a level that can drive the subwoofer. This amplification ensures that the subwoofer can produce the deep bass frequencies accurately and with sufficient volume.

Sound Quality: Using a dedicated subwoofer amplifier allows you to fine-tune the bass output and tailor it to your preferences. You can adjust settings like gain, crossover frequency, and bass boost to achieve the desired sound quality.

Avoiding Distortion: Underpowering a subwoofer by not using an amplifier can lead to distortion and potentially damage the subwoofer. An amplifier ensures that the subwoofer operates within its specified power range, minimizing distortion and protecting the subwoofer from harm.

Does wire size matter for subs?

If your sub system is going to put out more than 1,000 watts RMS, you can use 12-gauge speaker wire. But 16-gauge speaker wire works well for most installations. Take a hint and order twice as much as you think you need.

Preventing Overheating: Insufficient wire thickness can cause the wires to heat up under the load of a powerful subwoofer. Overheated wires can pose a fire hazard and may also lead to power loss and distortion in the audio signal.

Voltage Drop: Thin wires can experience voltage drop, especially over longer cable runs. Voltage drop can result in reduced power output from the amplifier, leading to decreased bass performance and overall audio quality.

Protecting Your Investment: High-quality subwoofers and amplifiers can be expensive. Using the correct wire gauge helps ensure that you’re getting the most out of your investment and that your equipment operates safely and efficiently.

Can I use any cable for subwoofer?

Any single, standard RCA or subwoofer cable should do just fine. However, if the sub is exhibiting a hum with the RCA/sub cable plugged into it, then maybe try using a “shielded” subwoofer cable. One end of the subwoofer/RCA cable will be plugged into the Subwoofer Output on the back of your receiver.

RCA Cables: RCA cables are the most common type of cable used to connect subwoofers to amplifiers or receivers. These cables have two connectors, typically red and white, and are designed to carry low-level audio signals. They are suitable for sending the audio signal from your source (car stereo, home theater receiver, etc.) to the subwoofer amplifier. RCA cables are available in various lengths to accommodate different setups.

Speaker Wire: Speaker wire is used to connect the subwoofer amplifier to the subwoofer itself. It carries the amplified audio signal and is available in different gauges (thicknesses) to match the power requirements of your subwoofer and amplifier. Thicker gauge speaker wire (e.g., 12 or 14 gauge) is suitable for subwoofer connections.

Subwoofer Cable: Some manufacturers offer specialized subwoofer cables designed specifically for connecting subwoofers. These cables often have RCA connectors on one end and specialized connectors on the other end designed to fit into the subwoofer amplifier and subwoofer input.

Where do you connect subwoofer wires?

Using a subwoofer cable (RCA cable), connect the subwoofer to the AV receiver by running the cable from the receiver’s subwoofer output to the subwoofer’s line input. Klipsch subwoofers can be connected via the LFE channel, the white RCA connection, or in a stereo pair by using both the white and red RCA connections.

Crossover Settings: Adjust the crossover settings on the subwoofer amplifier to determine the frequency range over which the subwoofer will operate. This allows you to specify which frequencies are sent to the subwoofer for reproduction. The crossover settings should match your subwoofer’s specifications and the acoustics of your car’s interior.

Gain and Level Settings: Set the gain (volume) and level controls on the subwoofer amplifier to achieve the desired bass output. Be cautious not to set the gain too high to avoid distortion or damage to the subwoofer.

Phase Adjustment (Optional): Some subwoofer amplifiers have a phase control that allows you to adjust the phase of the subwoofer’s output. Experiment with this setting to achieve the best bass response in your car.

How To Wire A Subwoofer In A Car


We began by exploring the fundamental concepts of subwoofers and their significance in car audio. You’ve grasped why wiring a subwoofer can enhance bass performance, improve sound quality, and create an immersive listening environment. You’ve learned about the necessary tools and components required for a successful subwoofer installation. From subwoofers and amplifiers to wiring kits and enclosures, you now know the building blocks of a robust car audio system.

With a firm grasp of the basics, you delved into the heart of the matter wiring techniques. The amplifier, running power and ground wires, and making speaker and signal connections. You’ve discovered the art of fine-tuning your subwoofer’s performance. From setting the gain and crossover frequency to adjusting bass boost and phase, you’re now equipped to customize your audio experience to perfection.

Throughout this journey, we emphasized the importance of safety and responsible installation practices. You’ve come to understand that proper wiring not only enhances your audio experience but also ensures the well-being of your vehicle and its occupants. As you wrap up your subwoofer wiring project, you can take pride in the you’ve harnessed the power of bass with skill and precision. Your car audio system now boasts the potential for rich, deep, and impactful bass that will make your music, movies, and road trips more enjoyable than ever.

Related Articles

Leave a Reply

Your email address will not be published. Required fields are marked *

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

The reCAPTCHA verification period has expired. Please reload the page.

Back to top button