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How To Make Car Speakers Louder Without AMP: 2022 DIY Hacks

It might sound impossible to learn how to make car speakers louder without amp but in reality, it isn’t.

It’s frustrating when your car speakers don’t sound as loud as you’d expect, even more so when it doesn’t do its job.

Amplifiers might increase the volume of your car audio but buying one can cost more than you’d like.

Moreover, you’ll have to carefully consider the amplifier as not all of them are compatible with all car models.

Plus, if you don’t know how to fix or modify cars, you might need to contact your mechanic, which costs even more.

Fixing one’s car audio might give most car owners a headache but did you know that you can increase your car speaker’s volume without the use of an amplifier?

Without further ado, here are some tips to help you increase your car speakers’ volume even without amplifiers:


Tips to Increase The Volume of Car Speakers Without AMP

01. Damping

Damping simply means improving the volume of your car’s audio by minimizing the noise emitted from inside your vehicle, which is caused by the vibrations the car makes when moving.

The principle behind damping is that the lower the noise your car makes, the better your speakers will sound.

To do this, you need to add insulation material to your vehicle panels.

This will make your car vibrate less and in turn, make your car speakers louder.

The areas that should be insulated or in this case, dampened are your doors, engine, floor, and boot.

It is recommended that you cover these areas as much as you can for optimal results.

  • Doors

One of the major contributors to the noise inside your car is your car doors. That said, it is one of the most important areas to dampen.

You should invest in a good damper for your car doors to better hear your car’s speaker volume.

  • Engine

One way to reduce the engine noise is by applying Dynamat to the bottom of the car hood.

It might be expensive material but most people use it because it is effective in improving car audio as it stops vibrations and rattling.

Dynamat can also be applied to other areas in the vehicle.

  • Floor

The floor is another major contributor to your interior car noise because of how close it is to the ground.

Hence, why dampening the floor is essential. Not only should you dampen the entire car floor but also the rear seats and muffles to reduce vibrations.

  • Boot

This another area that should be dampened. The sound quality of the subwoofer could be affected. Apart from the subwoofer, luggage can also produce interior noise.

02. Using Subwoofers

Subwoofers are similar to amplifiers in the sense that it amplifies the sound from your car stereo, effectively functioning like a loudspeaker.

It is designed to increase bass frequencies, giving you a more powerful musical experience.

Although they are usually paired with an amplifier, subwoofers can also be used alone. It’s a good alternative for amplifiers if you’re on a tight budget since they are not as costly.

You can find various types of subwoofers on the market. A popular choice for car enthusiasts is the car amplifier-powered subwoofer.

An active-powered subwoofer can be used in home theater systems as well as vehicles. This type can also be used with or without a separate amplifier.

To fully utilize your subwoofers, be sure to follow these steps:

  • Put your subwoofers in a place where it is not likely to vibrate like the corner of your car.
  • Adjust the phase of your subwoofer. After that, check if it’s in phase with your car stereo system. To do this, simply fine-tune the controls and parameters. Make sure to do this step properly, otherwise, your car speakers will compete with the sound from your subwoofers. If you’re not confident in doing it yourself, seek help from a professional.

DIY Steps in Installing a Subwoofer Without an Amplifier

You can install the subwoofers yourself but this will involve a little bit of technical knowledge. This contains more details in the installation process.


01. Completely disconnect the car battery before the installation begins.

02. Access the wiring by simply taking off the car speaker from the mounting dock.

03. Choose the location where you want to place your subwoofer then mount it afterward.

04. Reroute the cables for the stereo and power supply to the subwoofer.

Connect them. If there’s an outlet for a subwoofer on the system, make sure to connect it.

Once installed, learn to get the best sound through trial and error. Some things to consider are the placement as this determines the best phase switch setting.

For placement, the best spot depends on the car’s design and the fabric used for the interior as this could affect how your subwoofer sounds.

When choosing your location, move the subwoofer around to test which place gives the best sound.

03. Using Capacitors

A capacitor can be a helping hand when you use it with a subwoofer. When you play a song with high bass, it scatters the high energy in your car, resulting in a drop in your car’s performance.

Using a capacitor will store this high energy and not disperse it.

Thus, you can continue to listen to your songs without jeopardizing the performance of your car.

04. Using Non-invasive Add-ons

If you want another option apart from dampening and using subwoofers, you can try other gadgets that you can use to boost your car’s audio system. These gadgets are called non-invasive add-ons.

They help you in tuning and controlling the audio levels of your car audio system.

It is important, however, that you properly tune and adjust the frequency.

Otherwise, the poor adjustments might compromise the sound and subsequently, cause ear fatigue to the listener.

They do not require installation, thus making it easy to use as well as portable because you can carry it around and bring it anywhere outside of your car.

You can also access audio information that you have on your phone through the non-invasive add-on.

Another good thing about non-invasive add-ons is they don’t cost as much as changing your speaker or getting an amplifier.

However, when you do decide to get one, you first must do your research. There are several options available in the market – various gadgets with different features.

When you select your gadget, some features you should keep in mind and consider are the portability, the sound quality, and the number of accessible stations on a said gadget.

Portable satellite radios are great gadgets to consider. You might also want to buy a Bluetooth kit to connect your phone to your audio system.

This way, you can listen to songs that are stored on your phone.

05. Adding Tweeters

Another way to improve the sound quality is by adding tweeters in your car.

Tweeters help enhance your audio system to let you hear loud and clear music.

Along with your speakers, adding tweeters to your car stereo is a great choice at a minimal cost.

06. Buying New Wire Connections

Wire connections are important to keep the quality of your car audio system in top shape.

Unfortunately, people often forget that wire connections are not built to last forever.

Wire connections, after a certain time and need to be changed or replaced with new ones.

It is necessary to regularly check your wire connections as it affects the electrical signaling within the audio circuit which could result in poor sound quality.

When your wire connections need changing, have your wires changed by a professional.

Concerning wire connections, you should know about electrical impedance. Electrical impedance is the hinders electrical signals from turning into audio.

The more the interruption occurs, the more it negatively affects the audio system.

One way to lessen the electrical impedance whilst getting the best sound quality, the specs of your speakers and audio system should match.

In addition to regularly checking your wires, you should also check the speaker coils, magnets, and the health of the overall circuit in your audio system.

This is to ensure that the electrical impedance is kept in check and as less as possible.

07. Playing Quality Music

This is rather self-explanatory. You can’t expect your car audio to produce a great sound if the quality of your music is subpar.

Your car audio system replicates whatever music you input quality-wise. If you expect your sound system to create a mood, play better quality music.

When compressing files, be sure to not overdo it. Remember, the larger the file size, the higher the quality; the higher the quality, the better it will sound with your car stereo.


Learning how to make car speakers louder without amp doesn’t have to cost you as much nor is it difficult.

You can make your car speakers sound louder without an amplifier through methods like damping and adding components to your car audio systems like subwoofers, non-invasive add-ons, tweeters, and capacitors to boost your car stereo’s sound.

To ensure great sound quality, regularly check the wire connections and play quality music.

The bottom line is, do your research before doing it yourself. If you’re not confident in doing the task, don’t be afraid to get help from a professional to get the job done properly.

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