8 Best Under Seat Car Subwoofers of 2021

by Joshua Thomas

If you do not have a lot of space in your car for the music system, you should think about investing in the best under seat car subwoofers. These are compact subwoofers with a slim profile that allows them to be tucked under a seat.

One of the best things about the under seat car subwoofer is that it is very easy to install by almost anyone. Additionally, since it uses the space under the seat as an enclosure, it produces a deeper and even more powerful bass, which compensates for its small size.

Even better, most under seat woofers are powered, which means they come with built-in amplifiers for increased user convenience.

In this review, we have handpicked some of the top under seat car subwoofers on the market to give you some good recommendations.

Top Under Seat Car Subwoofers of 2021 by Editors

Top Under Seat Car Subwoofers of 2021 by Editors
Top Under Seat Car Subwoofers of 2021 by Editors

Summary of 8 Best Underseat Subwoofers 

IMAGE PRODUCT FEATURES
Rockville RW10CA
1. Rockville RW10CA (Best Overall)
  • Massive 800-watt peak power
  • High level inputs
  • 10-inch cone
  • More audio customization options
Rockville SS8P
2. Rockville SS8P (Best Budget)
  • More affordable
  • Cast aluminum enclosure
  • Adjustable input sensitivity
  • High level inputs
Kicker 11HS8
3. Kicker 11HS8 (Best Compact)
  • Compact and space-saving
  • Remote bass control
  • 150-watt amplifier
  • High and low level inputs
  • Velcro-fastened straps
Kenwood KSC-SW11
4. Kenwood KSC-SW11 (Most Durable)
  • Durable aluminum enclosure
  • More compact and low-profile design
  • Wired remote control
  • Noise-less sound
JBL BassPros
5. JBL BassPro SL (Beginner-Friendly)
  • Easy to use for beginners
  • Housing stays cool
  • Bass remote controller
  • More output options
Rockville USS10
6. Rockville USS10 (Amazing Controls)
  • Easy sound tweaking with the amazing controls
  • 2.9-inch thickness fits perfectly under seat
  • 800-watt peak power
  • Remote bass knob
Rockford Fosgate PS-8
7. Rockford Fosgate PS-8 (Built for Maximum Efficiency)
  • Efficient design and no sound distortions
  • Superior build construction
  • Easy to install by beginners
  • Thermal protection and reverse polarity circuits
Kenwood KSC-PSW8
8. Kenwood KSC-PSW8 (Powerful Amplifier)
  • Class D amplifier
  • Wired remote control
  • Simple 2 plug connection
  • Fits perfectly under seat

1. Rockville RW10CA - Best Overall

Rockville RW10CA 10
Rockville RW10CA 10

The massive 800 watts power handling of the Rockville RW10CA is what makes it our best overall subwoofer as it is more powerful than most other models on our list.

Furthermore, this model has a 10-inch cone that is also bigger than other models in this under seat car subwoofer review. This cone displaces a lot of air quickly, and it can produce a deeper and more powerful bass with no sound distortions.

Additionally, there are many audio customization that can be performed in this top-rated under seat car subwoofer. People who care how their bass sounds will like this unit very much.

With this subwoofer, you also get high-level inputs built to ensure installation is a breeze, as you will not have to remove the receiver. Also, there is more effective thermal protection to minimize the likelihood of burn outs.

There are not as many outputs on this subwoofer as others out there, but all the basic ones are included, and so this should not be an issue.

More Detailed: Rockville RW10CA Review

Also, note that Rockville also provides this subwoofer with a wire kit, if you go with the Rockville RW10CA+RWK10 option. This makes installation even easier as you will get everything you need.

Pros

  • Powerful 800 watts peak
  • Big 10-inch cone for deeper bass
  • Audio customization options
  • Thermal protection

Cons

  • Not as many outputs as other models

2. Rockville SS8P - Best Budget

Rockville SS8P
Rockville SS8P

Rockville always tries to cater to all kinds of consumers with all their products. Their model SS8P subwoofers is built for those shopping for a more affordable, but still highly efficient model.

It has a 2.8-inch enclosure that will ensure it will fit perfectly under the seat. Also, this enclosure is made from cast aluminum that will ensure it remains cool no matter how long the subwoofer operates even at maximum power.

Like with many other under seat subwoofers, Rockville also uses high-level inputs on this one, making installation quick and easy. Also, these inputs allow for installation even where preamp outputs are not available.

The input sensitivity can be easily adjustable. And it has 400-watt peak power and 100-watt RMS, which for its price are also quite good. To crown all this up, this subwoofer has some great controls for easy operation.

Although his subwoofer could do with a little more bass, for its price, what you get is still quite good.

More detailed: Rockville SS8P Review

Pros

  • Relatively affordable
  • Easier to install
  • Enclosures stays cool throughout
  • Input sensitivity is easily and precisely adjustable
  • Less thick for a perfect under seat fit

Cons

  • Could do with more bass

3. Kicker 11HS8 - Best Compact Under Seat Car Subwoofer

Kicker 11HS8
Kicker 11HS8

The 11HS8 from Kicker has been built specifically for tight spaces. At a little over 3 inches thick and only 14 inches long, it is quite compact. Hence, if you want something you can easily hide under a car seat, this will be an unbeatable choice.

It is rated as one of the best under seat car subwoofer with built-in amplifier for a good reason as its 150-watt amplifier will do a fantastic job at boosting the overall sound quality.

There is also a remote bass control that will make it easy to fine-tune your bass. And with the high and low level inputs, this subwoofer will integrate with almost any head unit be it factory or aftermarket.

Installation is straightforward as this subwoofer will include quick-connect power plug and also Velcro-fastened straps that will ensure secure installation and easy removal.

Even if the cone is a little smaller than in most others on our list, you can still expect above average sound quality as it is still highly efficient.

Pros

  • Perfect tight spaces
  • Easy and precise base fine-tuning
  • Powerful built-in amplifier
  • Simple and secure installation
  • Works with most head units

Cons

  • Smaller cone

4. Kenwood KSC-SW11 - Most Durable Under Seat Subwoofer

Kenwood KSC-SW11
Kenwood KSC-SW11

The Kenwood KSC-SW11 is a popular solution for car owners looking for superior quality car subwoofer. This model has a solid die-cast aluminum frame that makes it highly durable, and the fact that it is made by Kenwood should give you some assurance that it will provide good service for many years.

It also comes in a compact, low-profile design to make it easy to tuck under the car seat. Additionally, this under seat subwoofer can be remotely controlled for more user convenience.

As for the built quality, it is excellent. The whole unit is made of aluminum that also does a good job absorbing heat and preventing the woofer from overheating during extended usage at loud volumes.

Moreover, the front metal grille adds protection to the diaphragm and helps extend the woofer's life. And overall, this subwoofer has been designed to provide noise-less sound.

On the downside, if you like tweaking your music, then there is a limited number of customization. But, it still sounds good at default setting for those who do not care about bass tuning.

Pros

  • Aluminum body for heat absorption and durability
  • Very compact and low-profile
  • Comes with a remote control
  • Front metal grille for protection
  • Clear, noise-free sound

Cons

  • Limited sound tuning options

5. JBL BassPro SL - Beginner-Friendly Subwoofer

JBL BassPros
JBL BassPros

JBL BassPros is one of the easiest subwoofers to install by beginners because the connectors at the back are straightforward and clearly marked.

To make it even more irresistible, the JBL BassPros has many outputs at the back that allows the user to customize the bass based on specific preferences.

Furthermore, due to the efficient design, this woofer will remain cool to the touch even when it is played at high volumes. Therefore, this drastically reduces the risk of a fire and makes this model very safe to use.

It still has a regular 8-inch cone inside, and even if it is small, it is punchy and deep and better sounding than most models in this under seat car subwoofer review.

For its price, this subwoofer should have a little more bass, but it still has a fantastic sound. Hence, unless you are looking for a super high kick, it should still work well for you.

Pros

  • Easy to install and use by absolute beginners
  • Works with wired bass remote controller
  • High quality and premium build construction
  • Many outputs at the back for audio tuning
  • Remains cool even at high volumes

Cons

  • Not enough bass

6. Rockville USS10 - Amazing Controls

Rockville USS10
Rockville USS10

A good subwoofer should both produce an amazing sound and allow you to tweak the sound easily to suit your preferences. The Rockville USS10 meets both conditions as it will include some amazing controls for easy sound adjustment.

This 10-inch slim car subwoofer is made with fitment in mind as it is only 2.9 inches thick, which ensures it will fit under the car seat perfectly.

Its 800-watt peak power also makes this one of the most powerful subwoofers on our list. And for those that value a good bass punch, it not only provides lots of it but also comes with a remote control to allow you to adjust it easily.

Because the inputs and outputs are all in one side, installation is not only easier but the wiring will also be neater. This subwoofer is available in an 8-inch size for those that prefer something even more compact.

Although the instructions that come with this subwoofer are a little wanting, this is hardly a concern because even beginners will find it straightforward to install.

Pros

  • Easy sound adjustment
  • Fits perfectly under car seat
  • Higher peak power
  • Bass remote control included
  • Easy and clean installation/wiring

Cons

  • Wanting instructions

7. Rockford Fosgate PS-8 - Built for Maximum Efficiency

Rockford Fosgate PS-8
Rockford Fosgate PS-8

The Rockford Fosgate PS-8 is built for maximum efficiency. It has a built-in 150-watt amplifier that ensures that not not only works efficiently, but also delivers the best sound quality.

Moreover, the build quality is superior to other models we have seen in this price range. The whole front face of this woofer has a metal grille that protects it from external elements, and the enclosure is solidly made.

It still maintains a low-profile and compact design despite the heavy-duty build. And because it has an all-inclusive system, you will not need to run a lot of wiring as a signal, power and ground are all you need to run.

Also, if you like to customize your music, then the Rockford Fosgate PS-8 has many outputs and tuning options that make it a very versatile subwoofer.

This woofer has a quick connect system that easily allows you to connect and disconnect input cables. This makes it very easy to install and use by beginners.

When compared to other models on this list, this is the priciest one. But its build quality and overall performance will ensure you get the best value for your money.

Pros

  • Efficient with low heat and no sound distortion
  • Durable enclosure made from industrial grade vinyl
  • Many audio customizations at the back
  • Reverse polarity and thermal protection circuits

Cons

  • A bit pricey

8. Kenwood KSC-PSW8 - Powerful Amplifier

Kenwood KSC-PSW8
Kenwood KSC-PSW8

The class D amplifiers is one of the many things that make this an amazing Kenwood subwoofer as it is powerful enough to deliver a nice punch.

And the fact that this is a Kenwood product, you can expect to get superior sound quality with no noise.

Installation is also quick and easy as there are only two plugs. With the smaller profile of this subwoofer. It will fit perfectly under the car seat.

This subwoofer has an 81 dB sensitivity, which for its price and size is quite good, and it has a frequency response of 35 to 150 Hz, which for cars is perfect.

The remote does not seem to control much, and so most of the settings have to be adjusted on the unit, which can be a little inconvenient. However, this is still not enough to be a deal breaker.

Pros

  • Powerful amplifier
  • Quick and easy installation
  • Small and low profile design
  • Clear sound with no noise

Cons

  • Limited remote control

How to Buy the Best Under Seat Car Subwoofer

How To Buy An Under Seat Car Subwoofer
How To Buy An Under Seat Car Subwoofer

There are some important factors to consider to make sure you get the best hideaway car subwoofer for the money, and they include the following.

1. Powered or Passive

As you shop for an under car seat subwoofer, one of the first decision that you will need to make is whether to go for the powered or passive types.

Powered subwoofers are the kind that have a built-in amplifier like Kicker 11HS8. And this means you will not need an external ones, which besides saving you space also allows for a neater fit as there are fewer wires.

Passive subwoofers, on the other hand, do not have a built-in amplifier and will rely on an external one. These are not very popular given that you need to buy a separate amplifier, and the setup will take up more room. However, you get the freedom to use a more powerful amplifier or any that you like.

2. Size

The size of the subwoofer is also vital as it determines how much space it will take under the seat or even if it will fit.

Hence, to make sure that the size you buy will work for you, it is important first to check the amount of space you have under the specific seat to install the subwoofer.

That said, something that is under 3 inches thick or something close to this such as the 2.9-inch thick Rockville USS10is always perfect.

3. Power: RMS and Peak

Your subwoofer also needs to be powerful enough, and here you will need to look at the maximum wattage that it can deliver.

However, things are not that straightforward as you will need to check both the peak and root mean square (RMS) power.

Peak power is the maximum power that the subwoofer can utilize in short bursts, while the RMS is how much continuous power it can handle.

For the peak power, an 800-watt model like Rockville RW10CA is perfect, while 100 to 200 watts is often good RMS for these subwoofers.

4. Sensitivity

A subwoofer that is more sensitive will require less electrical energy to move the cone and produce sound.

Therefore, such a woofer is considered to be more power efficient than other models.

Moreover, since it consumes less, it will also last longer since the components will heat less and are more durable over time.

5. Impedance

If you want a clean install and do not want audio wires to be visible, then you must use thin wires for the connections.

However, note that only a top-rated under seat car subwoofer with a low impedance will accept thin wires.

For discreet installations, a 2 Ohms subwoofer is always better than a higher impedance model.

6. Resonant Frequency

The resonant frequency is the minimum frequency the subwoofer can respond before it distorts. Here, lower is better.

Lower resonant frequency is good since an under seat subwoofer will be in a confined space where it is more prone to distortions.

A lower resonant frequency should help massively in producing a clearer and cleaner sound.

Conclusion

Conclusion
Conclusion

Under seat car subwoofers are perfect because, besides being out of sight, they are still powerful and super easy to install and use. And now you can easily get a good model for your vehicle with our review above.

That said, the 8000-watt peak power Rockville RW10CA is our best overall as besides being powerful, it has high level inputs, and larger 10-inch cone, all of which deliver a superior performance.

But, if you are shopping on a small budget, the more affordable Rockville SS8P will be a great pick for you.

About Joshua Thomas

Joshua Thomas just simply loves cars and willing to work on them whenever there's chance... sometimes for free.

He started CarCareTotal back in 2017 from the advices of total strangers who witnessed his amazing skills in car repairs here and there.

His goal with this creation is to help car owners better learn how to maintain and repair their cars; as such, the site would cover alot of areas: troubleshooting, product recommendations, tips & tricks.

Joshua received Bachelor of Science in Mechanical Engineering at San Diego State University.

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