Best Under-seat Subwoofers of 2021 | Rated Reviews & Buyers Guide

Underseat subwoofers have become a necessity in 2021 and rightfully so. Gone are the days when your music system would take a large portion of your car’s space. Although they were undoubtedly great at playing music, the extra space required to house them just isn’t feasible in today’s time. This is where under seat subwoofers come in.

What Are Under Seat Subwoofers?

Under seat subwoofers are compact subwoofers that have a built-in amplifier and are housed in one single unit. They are small enough to fit under the driver’s seat, hence the name. The innovative design ensures that drivers don’t have to miss out on quality audio just because they have a smaller car.

And although there are a lot of subs in the market, finding the right one can be a very tedious and time-consuming job. We have to consider multiple factors such as frequency response time, wattage, sensitivity, and the quality of audio and materials used. In this article, we will list out 9 of the best under seat subwoofers and make sure you find what’s right for you.

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1. Kenwood KSC-PSW8 250W Max (150W RMS) Single 8″ Under Seat Powered Subwoofer Enclosure W/Remote Control

Kenwood under seat subwoofers
Dimensions9.45 x 13.78 x 2.95 inches
Power150 watts RMS power (250 watts maximum)
Frequency response35-150 Hz
Sensitivity 81 dB
Class amplifierClass D
Subwoofer Specifications
8.5Expert Score

  • Very compact size and can fit easily in any car.
  • Ample bass at 150 watts RMS.
  • Easy set up and installation.
  • Remote control is very basic and it's the only control you get on the whole sub woofer.

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This 8″ subwoofer from Kenwood packs a great punch when it comes to delivering strong bass. It’s very compact and lightweight and should fit easily in any car.

It comes with a built-in 150 watts RMS amplifier and is enclosed within a very solid and high-quality rigid enclosure. This eliminates unwanted effects like rattling and overall makes the sound quality much better.

In terms of controls, this under seat subwoofer comes with a wired remote. The remote can control the frequency, gain, and phase and that’s about it. You can modify all of these parameters depending on the size of your main speakers.

In terms of connections, this sub comes with a single wire harness with the usual power/ground and turn-on wiring. The harness comes with a long power wire as well which can easily connect to the battery of your car. The installation is also quite simple and straightforward, you have to connect 2 plugs and that’s all.

Overall it is a solid subwoofer that can be set up under any seat and provide some commendable low-frequency output while giving you control from your driver seat with its remote.

2. Cerwin Vega VPAS10 10″ 2Ω 550W Max / 200W RMS Powered Active Subwoofer Enclosure + Bass Knob

Cerwin vega under seat subwoofer
Dimensions13.60″ L x 9.60″ W x 2.60″ H 
Power200W RMS @ 2Ω @100Hz, 450W MAX
Bass Boost0-12dB
Subsonic Filter 35Hz
LPF Filter 75-150Hz
Phase Switch0 or 180 degrees
Safety featuresPWM MOSFET Power Supply/Thermal Protection Circuit
Subwoofer Specifications
8.8Expert Score

  • Provides some powerful bass
  • Solid build quality
  • Can overheat at times so it is preferred to install it somewhere well ventilated.

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This is one of those subwoofers that is a powerhouse in every way. This sub is built like a tank and as many users already stated, it sounds like a tank as well. It can produce some really strong bass at 200 Watts RMS which can go all the way up to 450 peak if you max out everything. It is enclosed in a solid aluminum frame which ensures this compact little beast stays protected at all times.

The sound quality is excellent and the lows that it can produce are sure to satisfy any bass cravings that, you have been having. The bass is powerful and you feel it pump up but it’s balanced just right so it doesn’t end up rattling any of your mirrors.

On the other hand, the sound quality overall is also very decent and adequately loud. It has a sleek design which means you can fit in anywhere in your car, be it under-seat or behind. It is a powered sub, meaning it comes with an amplifier inbuilt which is great and saves you the hassle of getting one separately.

Overall, if you are looking for a subwoofer that doesn’t take a lot of room and provides some solid bass then you can go for this one.

3. JBL BassPro SL 8-inch 125W RMS Powered Under-Seat Compact Subwoofer Enclosure System (250 watts RMS: 125 watts)

Jbl basspro under seat subwoofers
Dimensions13.54 x 9.84 x 2.8 inches
Power output: Peak250 watts RMS: 125 watts
Frequency Response35Hz – 120Hz
Crossover Frequency50Hz – 120Hz
Crossover Slope12dB/octave
Bass Boost 0dB to 9dB at 70hz
Amplifier ClassClass D amplifier
Subwoofer Specifications
8.4Expert Score

  • Excellent audio quality for the size.
  • Good build and design
  • Does not come with a remote and the bass can be underwhelming if you are used to 12 inch sub woofers.

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Keeping true to its tradition, JBL keeps delivering high-quality audio solutions and this one is no exception. Don’t expect it to shake your car or blow you away, it has good bass and provides some solid performance for the price.

And seriously, being an under-seat subwoofer, it is great for the segment it is in. For the size and weight, it does pack a solid punch and the bass is satisfyingly good keeping in mind how small this thing is. The thing is also easy to install and doesn’t require you to buy any additional mounting hardware.

It’s a powered sub and comes with a built-in amplifier like the other subs on the list. Overall it is a high quality, decent, and clean sounding JBL subwoofer and definitely deserves some recognition.

The folks at JBL surely know what they are doing. And this is why this under-seat subwoofer is so easy for us to recommend.

4. Rockford Fosgate P300-12 Punch 300 Watt Powered Loaded 12-Inch Subwoofer Enclosure

Rockford fosgate p300 12 inch
Dimensions11 x 19.8 x 15 inches
Woofer Size12″
Frequency Response20 Hz to 200 Hz
Integrated Amplifier 300 Watts RMS
Subwoofer Specifications
9Expert Score

  • All inclusive design
  • Built-in adjustable bass boost EQ
  • Intelligent auto turn on/off function.
  • Built-in 0°/180° phase switch.
  • Can be very loud and for most people, the 10 incher would be more than sufficient.

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If you think an 8-inch subwoofer isn’t something for you and you want something bigger then this 12 incher is the right one for you. It comes with a 300 watts amplifier so you know you are in for some explosive audio experience.

If you own a smaller car or a compact vehicle then these woofers can rattle your car hard. But if you are planning to use it on a larger vehicle like an SUV then it won’t rattle as much but the power is still there.

It definitely booms hard though and delivers some excellent audio experience to behold. The quality of the enclosure is also up to the standards and should be able to withstand the usual wear and tear from your daily commune.

Other functionalities include a detachable power/ground connector, auto turn on/off, and thermal as well as over-voltage protection. The built-in adjustable bass boost equalizer also comes in pretty handy at times. It is a fine set and overall a pretty great deal for what you are paying.

5. Rockville RWS12CA Slim 1200 Watt 12″ Powered Car Subwoofer Enclosure + Wire Kit

Rockville 1200 watts
Dimensions24″ L x 15″ H x 4.37″ Top x 6.65″ Bottom
Power1200 Watts Peak, 300 Watts RMS
Frequency response38Hz-500Hz
Low Pass Crossover Frequency(24dB) 50Hz-250Hz
Size12 inch Subwoofer
Subwoofer Specifications
9Expert Score

  • Can pump out some excellent bass.
  • Comes with a wiring installation kit.
  • Easy installation
  • The remote control could have been a little bit more sophisticated.

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If you want something with a bit more oomph and something that can slap hard then this one is for you. It’s a 12″ powered subwoofer that comes with a wire kit, all in one package. The subwoofer can peak at a mighty 1200 watts while the RMS is at 300. It comes with a quick-connect Molex high-level input alongside a smart turn-on circuit design. In terms of control you have remote bass, adjustable low pass crossover, gain control, and variable +12dB bass boost.

The slim design also ensures that it can fit behind or under your car or truck seat.

The lows on this one is pretty strong and highly intense which makes it perfect for a bass lover. The MDF box enclosure looks and feels rigid and should be able to withstand some damage.

You also get a 8 Gauge 2 Channel car amplifier wiring installation kit which eliminates the need of getting one separately.

Overall, if you want something that pumps out a lot of bass and slaps hard then you are in for some good time with this one.

6. Kicker 11HS8 Hideaway Powered Subwoofer

Kicker 11HS8 powered subwoofer
Dimension13 7/8 x 9 3/8 x 3 1/8
RMS Power150 Watts
Subwoofer size8 inch
Subwoofer Specifications
8Expert Score

  • Can fit in almost any car.
  • Great fine-tuning and adjustment capabilities
  • Doesn't come with any RCA inputs

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The Kicker 11HS8 powered subwoofers is one of the most loved and prominent subs to ever hit the market. This 8-inch under seat subwoofer includes a built-in 150 W (RMS, 14.4 V) power amplifier to provide you with a distinct and special listening experience that you have never experienced before. It is easy to mount and set up as it comes with a quick-connect power plug as well as Velcro-fastened nylon straps.

However, at the same time, it is just as easy to remove from your vehicle. This makes it a great choice for those who don’t want to get into any hassle of complicated installation procedures.

It additionally, gives you access to a remote control that easily allows you to control the phase and the two automatic turn-on options which are highly useful. Though it is not very big in its dimensions, it doesn’t ever make you feel like you are missing out on anything. Especially on the sound top quality which is pretty dope.

Buying Guide To Find The Best Under Seat Subwoofers

We have already discussed which are the best subwoofers that you can install under the seat of your car but it is also important to know how to choose one for yourself.

There are a lot of factors to keep in mind before buying one of these subwoofers and that is exactly what we will elaborate on in this section of the article.


The first and foremost factor that should be kept in mind is the size of the subwoofer. If the subwoofer is too big then it won’t fit under the backseat of your car. Similarly, if you get something too small for a larger car then the bass won’t be able to cover the entirety of your car’s interior. So the first thing you should do is check the dimensions of each of the subwoofers and compare them with the free space of your car. This will help you find the best under seat subwoofers with a preamp for your car.


FItting perfectly is not the only thing that your new set of subs should be good at. They should also be powerful enough and competent enough to deliver powerful bass. This is why it is so important to know the technical specifications of each of these subwoofers before you buy them.

Ease of setup and installation

This is straightforward, we want to enjoy our music. The longer it takes us to install an under-seat subwoofer, the longer we waste time not listening to our favorite music. This is why it’s important that the subs we choose are relatively easy to install.

User accessibility and control

This is although not the most important factor, but some time down the line can make you either love your new subs or completely despise them. Having the ability to adjust your speakers remotely is very important and adds to the overall experience of the user. Especially if you can control it directly from your driver’s seat.

Build quality and durability

You want your subs to be made out of something that’s durable and strong and can take a few hits. You don’t want to have a subwoofer that will die on you after crossing a bumpy road. So always choose a subwoofer that is from a trusted brand and is built out of strong materials.

Looking for an under seat subwoofer with preamp?

The best choice will be the Rockville RWS12CA Slim 1200 Watt 12″ Powered Car Subwoofer Enclosure, it checks all the marks and is reasonably priced, and performs relatively well.

What’s the best under seat subwoofer?

If you want to get the best under-seat subwoofer for your car then try picking up a Rockford Fosgate P300 which is a powerful but compact under-seat subwoofer and is a balanced choice overall.

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