Best Flat Subwoofers


Only a good bass can make your favorite music track livelier. But what will you do if you do not have enough space in your car? It would help if you had a flat subwoofer to cope with this situation.

These subwoofers come in a slim design to easily fit in a compact space. Though compact in size, they can produce a wide range of lower frequencies to enhance your listening experience.

Though there are large subwoofers available in the market, you cannot accommodate them in smaller cars or trucks. Therefore, a flat subwoofer for a car can give you a solution.

You can get these flat subwoofers that come in different shapes and sizes. You can choose the size as per your car accommodation. They are too powerful to add deep and rich bass to make your car’s door rattle.

There are endless options available in the market. You may feel confused about finding the perfect one suitable for your car. Therefore, I have rounded up some of the best flat subwoofers to help your quest.

Please go through the article to find one to get a punching bass. You will also find a detailed buying guide at the bottom of the item. It will also help you to make a smart purchase.

Best Flat Subwoofers Review

1. Sound Storm Laboratories LOPRO10 Amplified Flat Car Subwoofer

71DezyAP8sL. AC SL1500

Sound Storm Laboratories LOPRO10 car subwoofer comes first in this list of the best flat subwoofer. Though it is 10-inches in size, it can deliver a rich bass to your car subwoofer audio.

Enabled with 1200-Watt power, it can deliver excellent power to any of the dash-stereo systems. It comes only in 3-inches of height. Therefore, those who do not have much space in their car can easily accommodate this unit.

Even this compact flat subwoofer can easily fit under the seat of your car. This shallow subwoofer can release low to medium ranges sound for continuous hours without making the unit overheated. 

You will find an in-built amplifier present in this unit to deliver an uninterrupted power supply to play loud music. Therefore, you need not add an external amplifier to run this unit.

The manufacturers attach a Class A/B amplifier to help you to get an increasing sound and power without distortion. Moreover, it also comes with a low-pass controlling feature to restrict the low-frequency notes under a specified level.

It has a weird remote to monitor the controlling level to enhance the surrounding sound. It also has an automatic shut-off feature to monitor both the amplifier and the speaker.

Besides, phase control is another notable feature you will find in this flat subwoofer. You will discover RCA inputs to connect this subwoofer with multiple amplifiers.

What We Like

  • Pretty good sounding
  • Great build quality
  • It easily fits in a compact space
  • Fairly priced

What We Don’t Like

  • It comes with only 50-100-Watt RMS peak power
  • The volume cannot reach higher after a certain level

2. Infinity Reference REF1200S Flat Shallow Mount Subwoofer

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Infinity Reference REF1200S comes next in this list. It comes with all the specifications to deliver an excellent quality bass. You can get this subwoofer in an affordable price range.

It is available in 10-inches sizes. Though compact, it has an 800-Watt peak power to deliver a powerful bass to your favorite music track. The manufacturers attach two and 4-ohms impedance to this slim subwoofer to make it strong.

Though the impedance rating depends on this unit’s amplifier, you will notice a polypropylene-made cone along with a rubber surrounding it. It will help to limit the sounding beat without bit distortions.

Infinity REF1200S comes in a slim and stylish design. For those looking for a compact subwoofer to fit in a tight space, REF1200S will be the best option.

You can consider it to be the best under-seat subwoofer. Most interestingly, you can avail this unit in a pocket-friendly range. It can deliver good content of low-frequency notes without consuming much power. 

Moreover, the impedance settings come with good protection to ensure safety for the users. Besides, 96db sensitivity allows this flat subwoofer to deliver a rich and deep chest-thumping bass.

What We Like

  • It helps to save space in the car
  • Immaculate and tight sound
  • Well-priced
  • Durable

What We Don’t Like

  • Only 300-Watt RMS
  • Need to pair it with appropriate devices to get excellent bass

3. Rockville RW10CA Car Subwoofer

Rockville RW10CA is another best subwoofer you can install in your car. It is a potent subwoofer that comes with 800-Watt peak power and a 200-Watt RMS rating.

Therefore, this powered subwoofer will add deep and rich bass to your music track. It comes in a slim profile design that you can easily accommodate under your car seat.

It is the best under-seat subwoofer to add a powerful-sounding bass. The manufacturers attach an in-built amplifier with this flat subwoofer. So, it requires a straightforward and minimal installation.

It has a high-quality input to omit the remote-wire attachment. Moreover, auto-signal is a quality feature that has made it the smartest. Rockville RW10CA also allows you great control to monitor all the features.

You can control the bass level as per your preference. A subsonic filter is also present to remove the low-frequencies that the human ears are not comfortable with.

Besides, low pass crossover, phase control, and bass boost are notable features that have made this flat subwoofer for the car, possibly the best choice. 

What We Like

  • Very nice build quality
  • Small and compact
  • Great price
  • The controlling knob is convenient

What We Don’t Like

  • May face cut-off issue often
  • Not super loud sound, but satisfactory

4. PIONEER TS-SW3002S4 Subwoofer 

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PIONEER TS-SW3002S4 is another slim subwoofer to deliver powerful bass to your private vehicle. The manufacturers attach an oversized cone so tactfully that it will not cross the surface area.

Featured with a wide range of low-frequency notes, ranging from 20Hz- 125Hz along with 1200-Watt peak power, it can add rich and deep bass to enhance your sounding experience.

PIONEER TS-SW3002S4 has Air Suspension Control System that allows this unit to lock air between main and drive cones. Both these cones move simultaneously to get you an excellent loud sound.

This flat subwoofer from PIONEER comes in such a universal design to fit in many vehicles. Though it is compact, you need not compromise the quality of the sound.

Moreover, it requires an effortless and straightforward installation. Both the MICA injected oversized cone and 4-ohm voice coils are responsible for delivering a rich bass. Most interestingly, you can get this subwoofer in an affordable price range.

Besides, you will notice an impressive build quality in this PIONEER subwoofer. Therefore, it is durable and can withstand higher and rich volumes without a single distortion.

What We Like

  • It fits comfortably in almost all the vehicles
  • Delivers rich and deep sound bass
  • Easy installation
  • Looks slim and elegant

What We Don’t Like

  • Handles little low power than the other competing ones
  • Not suitable for tight space

5. Kicker CompRT Subwoofer

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Kicker CompRT car subwoofer comes last in the list of the best flat subwoofer. Kicker itself is a leading brand to manufacture several musical units for ages. Though it is small in size, it can deliver powerful and rich bass.

It is available in 12-inches sizes. Enabled with “all-weather” compatibility, you can accommodate this unit even in the bikes. Allowed with 400-Watt RMS power raring, you can consider it to be the best-powered subwoofer.

The manufacturers attach one and 2-ohm impedance to make it the most durable and robust. It comes with dual voice coils to combat heat management issues. 

A red stitching cone is present outside the woofer to give it a stylish look. The only issue you will face with this slim subwoofer is it does not have an enclosure.

Besides, this shallow subwoofer comes with a wide range of frequencies, ranging from 25Hz to 350Hz. So, it is ideal for delivering a heart-pounding bass to your favorite soundtrack.

Moreover, you will notice a ribbed Santoprene surrounding attachment to make this unit rigid and durable. You can use the Kicker CompRT subwoofer for cars or bikes and the best flat subwoofer for trucks.

What We Like

  • It comes with the highest RMS rating
  • Well-balanced and overpowering sound
  • Good build quality
  • Nicely priced

What We Don’t Like

  • Big and little heavy
  • Occupies valuable space

How to Choose Best Flat Subwoofer – Buying Guide

These are the following factors that you must consider before purchasing a shallow subwoofer:

  • Size: Subwoofers are available in various sizes, ranging from 8-inches to 15-inches. It is not always true that larger-sized subwoofers can release loud bass. Peak power and RMS rating are also responsible for the size. If you pick a large subwoofer, you may feel difficult to fit it in your car. Therefore, you need to choose flat subwoofers to make them easily mount in your vehicle.
  • Frequency range: Different subwoofers come with a diverse range of frequencies. Even a compact-sized budget subwoofer can come with a broader frequency range. Those who want to add a deep bass can pick the subwoofers with lower frequency notes.
  • Voice coils: Those who want a simple up-gradation can opt single voice coil. On the other hand, the subwoofers with dual voice coils offer excellent flexibility. Therefore, if you want to customize the settings as per your preference, you should purchase the dual voice-coil units.
  • Power: The wattage rating will consider how much energy a subwoofer can consume. You can get it from the peak power rating. Moreover, a subwoofer with the highest rating may be overheated after continuous hours of usage. Therefore, before purchasing, you must check the RMS rating.
  • Sensitivity rating: The sensitivity range will decide the power of a subwoofer. A slim subwoofer with higher sensitivity can create the same sound-consuming little power as the subwoofer with lower sensitivity.
  • Enclosure: This factor will decide the quality of a subwoofer. Therefore, it has a substantial impact on performance. For instance, a sealed enclosure can deliver deep bass, whereas a ported square can provide a higher bass level.


Before choosing the best flat subwoofer, you need to consider the type and level of music you will listen to. I have mentioned the best five flat subwoofers available in the market.

All these subwoofers come with quality features to deliver rich and deep bass. However, they all are compact but can provide powerful sound. You can choose anyone from the options mentioned above to get the highest quality sound.

Do not forget to share your own experience with us in the comments section below. 

About The Author

Hi, I’m Simon Franklin, founder of I love to play a lot with audio & music equipment. I test different sound & music gear to make my sound quality better. Each guide and review on this website has been approved by me to give you the right information.