How To Make Subs Louder Outside The Car (8 Simple Tricks) Flawless Car Guide

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How To Make Subs Louder Outside The Car

Like most individuals, you probably like listening to your favorite music while driving. However, the music can be too quiet inside and outside the car. Making subs louder outside the car might enhance your listening experience and draw attention. But how to make subs louder outside the car?

To get loud subs, people usually focus on power and amplifiers. Some even add a subwoofer and move it to get that earth-shattering sensation outside the car. Many fail to acquire that booming subwoofer.

This post will discuss loud subwoofers, typical faults, and how to make subs louder. let’s get started:

How To Make Subs Louder Outside The Car

Things That Make Loud subwoofers:

Powerful subwoofers impact audio for good cause. They create thunderous bass that shakes floors and windows. Several factors can cause subwoofers to emit loud noises.

These components work together to make subwoofer music listening to the greatest. Following are the things that help in making subs louder outside the car:

Subwoofer Size:

Subwoofers exist in numerous shapes and sizes, and their loudness depends on size. Bigger subwoofers make a greater sound quality. They have more surface area to make sound waves and can move more air.

Larger subwoofers also have more power, making them louder. Therefore choose a big subwoofer if you want a loud one.

Keep in mind that larger subs produce louder sounds but cover more space. Hence, if your car has limited capacity, you must choose one thing over another.


Subwoofer sensitivity affects loudness. Higher sensitivity subwoofers are louder. High-sensitivity subwoofers use less power to reach their maximum volume.

So, a subwoofer with high sensitivity can play louder with the same power than one with low sensitivity. 

Enclosure Type:

The correct enclosure is needed to build a loud subwoofer. Some may think that a powerful subwoofer doesn’t need a subwoofer box. Not so. Enclosures direct and amplify high sound quality, making subwoofers louder.

Sealed enclosure and ported enclosure are the main types. Airtight sealed enclosure delivers the best bass response. They operate effectively with a variety of speaker sizes and shapes in small to medium-sized cars.

Ported enclosures boost bass output by increasing woofer efficiency using a tuned port or duct. They are best for large SUVs and can withstand more power than sealed subwoofer box. They have greater SPL (sound pressure level).

Power Handling Capacity:

Consider power handling while making subs louder outside the car. The more power a Loud subwoofer can withstand, the louder it can play without sound distortion.

Its powerful magnet and voice coils dissipate electric energy. Hence, it produces all the frequencies for louder bass without affecting music quality.

It’s crucial to note that power handling capacity is only one factor that helps make subs louder outside the car. A subwoofer with high power and low sensitivity won’t be as loud as one with low power and high sensitivity.

Because peak wattage can be twice as high, you must check continuous power RMS. Producers fool buyers using this trick. They may say a subwoofer produces 2,000W, but it actually produces 800-1000W RMS.

Size of Box:

Most agree that subwoofer box size affects volume. Larger sealed enclosures or ported enclosures make subwoofers louder. A bigger subwoofer box gives the woofer more air to move and make a louder sound. A bigger box can produce lower bass frequencies and extend bass.

Before choosing, evaluate your demands because a huge box may be harder to put into a tiny location.


Another thing that helps make subs louder outside the car is its design. Subs are usually flat, cylindrical, or square. The loudest subwoofer is a flat-boxed one.

A cylindrical custom box provides loud bass. Finally, the square design suits individuals who don’t want a loud subwoofer or focused bass.

Built-In Amplifiers:

Like the other factors, a built-in amplifier makes a loud subwoofer. Thus, don’t choose the one without an amplifier.

This is because a built-in amplifier utilizes the same power as the sub. It saves you from carrying an AC adaptor.

Speaker Placement:

Sub-placement determines the volume. If speakers are aimed the wrong way, sound waves will reverberate off nearby surfaces. These muffles sound quality.

Speakers facing the trunk direct sound outdoors and make it easier to hear. It gives you the subwoofer experience without the cost.

How To Make Subs Louder Outside The Car

How To Make Subs Louder Outside The Car? 

Many individuals don’t know that subwoofers can be louder. Simple tweaks can boost your subwoofer’s power and volume, improving your driving experience. Following are a few ways that you can make your subwoofer louder. 

Increase The Number of Subwoofers:

There is no getting around it, if you want your subwoofer to be loud, you’re going to need more than one. A single subwoofer can create decent bass, but adding a second or third will boost volume and low-end response.

More subwoofers will move more air and assist sound bass waves to travel farther, making the sound quality louder.

Depending on sub size, power, and automobile space, the number of subs needed to produce the necessary volume will vary. But, doubling or tripling the subs should increase volume significantly.

If you’re buying more subwoofers, make sure they’re compatible and will work.

Increase The Power:

To make the subwoofer louder outside the car, increase its power. The bass will get louder outside the automobile as power increases.

Minimal electrical impedance can boost sub-power. You can see a big performance boost.

Increase The Size:

There are several techniques to increase subwoofer volume. One method is to increase the subwoofer size. Due to high pressure, the car audio system will have greater space to move air and emit sound.

Use A Ported Box:

A custom-ported box boosts subwoofer efficiency, allowing it to create more sound. Ported speaker enclosures allow air to escape more readily than sealed subwoofer boxes. Its design boosts car audio system efficiency and subwoofer volume.

In addition, a ported sub-box will boost louder bass output, improving sound quality. You can construct your own rear-ported sub-box or buy one. Make sure your subwoofer’s ported sub-box is the proper size.

Yet, a ported sub-box is the easiest way to make the subwoofer louder.

Open Car Windows:

Most people agree that subwoofers sound better with car windows open. Because sound system waves have greater room to travel and disperse, so you get clear and loud bass. Opening windows is the best technique to boost subwoofer volume.

Position Properly:

Placing your subwoofer appropriately maximizes its potential and makes it louder. The entire Sound system sounds better when placed properly.

Subwoofers should face the trunk. Facing the trunk maximizes sound outside the car.

Avoid seating your subwoofer. This will dilute the sound. Avoid blocking the subwoofers backports. This can lower subwoofer volume.

Do Proper Tunning:

Adjusting the subwoofer for loud music is time-consuming but worthwhile. For optimal results, tweak the amplifier and equalization settings. The location might also improve performance.

Change gain and frequency to optimize the amp. Adjust the amp’s crossover settings to send low-frequency sounds to the subwoofer instead of the speakers.

Find the ideal settings by experimenting. Always start with lower settings and progressively increase them until you achieve the desired loudness. Overpowering your speakers can damage them.


When choosing a subwoofer, check sure its frequency range matches your demands. The subwoofer frequency range determines its lowest and highest pitches. Your subwoofer may not create high-pitched sounds if its frequency range is too low, and vice versa.

If you want a booming subwoofer, pick one with a 2000Hz frequency range. Most subwoofers today have a 100-500Hz range.

What Is The Power Requirement Of Your Subwoofer?

RMS wattage determines subwoofer power. First, consider RMS power when matching amplifiers.

The subwoofer’s RMS power should match or be lower than the amplifier’s for the best effects. To avoid clipping at high volumes, the amplifier should be larger than the subwoofer due to power reserve.

If your sub has 2000 RMS, its amplifier must be 2500–3000 RMS.

The amplifier and subwoofer electrical impedance must match. Your sub and amplifier must support 1 ohm. Remember to match your amplifier to your subwoofer, not vice versa.

How To Make Subs Louder Outside The Car

Proper Tunning Of Amplifier For Loud Subs:

Adding a subwoofer and amplifier won’t make subwoofers louder. Tuning your amplifier will optimize your sub’s performance.

If you’re not ready to modify, expect poor sound quality or inadequate bass.

Getting loud subwoofers requires only a few amplifier settings changes.

Make sure the amplifier and subwoofer are in phase first. Set the amplifier single-phase switch to match the subwoofer phase.

You can also modify the crossover frequency on the amplifier. This will direct all subwoofer sounds to the subwoofer and not the other speakers in your system.

You can also boost your subwoofer’s amplifier gain until you hear a clipping noise. These options can alter your system’s sound, so listen carefully.

How To Make Subs Louder Outside The Car

Common Mistakes That Affect Your Loud Subwoofers:

To make car subwoofers louder, you first need to identify and avoid the common mistakes that affect their overall performance. There are a few of the most common mistakes to avoid:

Lower Frequency:

Making car subwoofers louder usually involves focusing on lower frequencies. This is a typical mistake that impacts subwoofer quality and volume.

You may optimize your subwoofer in a few ways. Never play music below 40 Hz, regardless of the setting.

First, don’t use a sub without an amplifier. Second, adjust settings until you find the proper low-high frequency balance. Finally, turn up the volume to hear those low tones.

The Phase Difference Between Subwoofer & Speaker:

Many don’t understand there’s a phase difference when connecting a subwoofer to a speaker. This can cause efficient subwoofer volume errors.

When speakers and subwoofers work in separate frequency bands, this phase discrepancy occurs. Subwoofers handle low-frequency sounds while speakers handle mid- and high-range frequencies.

To generate a coherent sound, match the subwoofer and speaker phases. If they’re out of sync, one will dominate and your subwoofer won’t perform well.

Improper Size:

Many individuals buy subwoofers without considering the size. They choose one they like. This typical mistake might reduce subwoofer volume. Choose a subwoofer that fits your space to make it louder.

People often buy a smaller subwoofer because it’s cheaper or because they don’t have enough space. This is a mistake since a smaller subwoofer cannot produce as much sound. If you play your music too loud with a little subwoofer, it may distort.

If you want a louder subwoofer, purchase one that fits your space. It will enhance maximum volume.

Wrong Wiring:

Your loud subwoofers are affected by the wrong wiring. Wiring a subwoofer requires correct polarity. Connect the amplifier’s positive and negative terminals to the subwoofers. Connecting them wrongly will reduce subwoofer performance. You might damage it.

A test CD with a sine wave track can be used to verify polarity. Listen to the deep bass notes on the bass-heavy music. If they’re weak, your wiring is probably inverted.

Checking the speaker’s terminal marks is another option. The + sign goes to the red wire and the – sign to the black.

How To Make Subs Louder Outside The Car

How To Improve Bass Of Your Subwoofer?

If you want to improve the bass performance of your subwoofer, you can try some simple tips. A few of them are as follows:

Start With Basics:

Before proceeding to other steps, ensure all the basics have been cleared. If your subwoofer has a built-in amplifier, make sure to plugin before you proceed to further steps.

Likewise, If your subwoofer doesn’t come with a built-in amplifier, you’ll have to install one before moving to the next steps. Once you have done the basics move to the second step.

Check The Volume And Bass Boost Levels:

Many folks want richer bass sound from their subwoofer but don’t know how. Check your vehicle subwoofer bass level to increase it.

Adjust the crossover frequency and amplifier gain. Subwoofer phase adjustment may be needed. These steps can boost your car’s bass.

Volume can also increase subwoofer bass. Many people turn up their subwoofer volume to boost bass, but this can damage their speakers.

It shouldn’t be loud or soft. The ideal volume lets you feel the powerful bass boost without distorting. This produces the greatest sound without damaging your speakers.

Install A Preamp:

Preamps boost car subwoofer bass. Bypassing the head unit amplifier and delivering a louder signal directly to the subwoofer will boost bass.

It’s crucial to explore preamps to pick one that meets your demands. Most preamps can be installed by plugging in a few cords.

If you’re not comfortable installing the preamp, a professional can help. After installation, you’ll experience a booming deep bass boost that will enhance any ride without breaking the bank.


Q: Do I Need To Connect Another Car Subwoofer?

A: If you can have a little extra space in the trunk, adding multiple subwoofers in one large box can enhance your music experience. 

Try experimenting with playing subwoofers below 210Hz this will definitely help in making subs louder outside the car.

Q: How Much Power Do My Subwoofers require?

A: Each piece of power you always require to provide your subs must be dependent on the RMS voltage value they’re operating with. Upon receipt of the RMS voltage level, you first need to maintain the RMS wattage in mind when picking an amplifier.

Q: How to make subwoofer louder outside the car?

A: There are several ways you can follow that will make the subwoofer louder. You can try increasing the number, power, and size, using a custom ported subwoofer box, proper tuning, and more. Another option is to use a better speaker.

And last, you could try using an alternative audio source, such as streaming music from the streaming services Spotify or Apple Music.

Q: Does a bigger box mean loud subwoofers?

A: No, the box of the subwoofer doesn’t make your subwoofer louder all the time. It’s just one of the other important factors such as speaker quality, subwoofer box, subwoofer size, sensitivity, and speaker placement.

You will need to consider others factors as well to make the subwoofer louder.

Q: How do I make my sub-bass deeper?

A: You can enhance your sub-bass in a variety of ways, including increasing the power amplifier, amplifying the subwoofer with an external amplifier, or utilizing a larger subwoofer.

You may also strengthen the isolation of your subwoofer by installing it in a subwoofer box or mounting it on a sturdy base. These will help you get a louder yet deeper bass. 


In conclusion, making subs louder outside of the car is possible, and there are several ways to do so. The most effective way to make loud subs is by increasing the number of subwoofers, though this may not be feasible for everyone.

Other methods, such as using a ported box or increasing the power and size, can also be effective in making subs louder outside the car.

Whatever method is chosen, it is important to make sure that the sub is properly tune and that the system is properly placed. Hopefully, you found the answer to your question about how to make your subwoofer louder.

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