A good audio system in your car isn’t possible without the best underseat subwoofer. We know that you can have subwoofers of all shapes and sizes, but if you want more space in your car, we highly recommend that you check out our guide for the top 10 best underseat subwoofers!

Our handy dandy comparison table contains all specifications for each underseat subwoofer within our guide:

A Comparison Table of Our Top 10 Underseat Subwoofers

ModelPower(watts)Frequency (Hz)Dimensions (HxWxD) (inch)Weight (lbs)
CERWIN-VEGA MOBILE VPAS1020075-15013.6x9.7x2.69.4
KENWOOD KSC-SW1115035-15011x7.5x2.88.5
ROCKFORD FOSGATE P300-1230035-15015x19.8x1729.6
ROCKVILLE RW8CA15050-15012.4x11x2.77
JBL GT-BASSPRO1215035-12014x22x1238.6
PIONEER TS-WH500A15020-20013x9x29.4
ROCKVILLE RWS12CA SLIM40038-50024x15x4.378.5
JBL BASSPRO SL - JBL 812550-1208x16x68.5
ALPINE ELECTRONICS PWE-S812032Hz-15013.5x 9x39
KICKER 11HS815025-12013-7/8 x 9-3/8 x 3-1/89.4

Below, we offer a more detailed look at every selected product for our top 10 best underseat subwoofers:



Every sports car owner should take a closer look at the Cerwin-vega Mobile before buying an under-seat subwoofer, since it delivers an amazing combination of a slim profile and serious power. This one definitely has swag! Its box is only 2.6 “thick, but it has a subwoofer with a 10 “shallow mount with an impressive 200W RMS and a maximum output of 400W. As a result, this little beast packs some serious punch: its range of frequencies is great, while the sound is full but not overpowering. Since it’s a compact, powered subwoofer, you won’t win any competitions, but any stock sound system can be greatly improved, filling the low end and adding a solid kick. The Cerwin-vegaVPAS10 Mobile is ideal for convertibles or compact cars with very limited space. The box’s construction quality is top-notch, well-built, and has a robust, solid cast-aluminum enclosure that cannot be damaged in normal operation. The unit has a built-in thermal protection circuit to ensure a long life to avoid overheating problems. The installation is easy: the signal can be run from an aftermarket radio via RCA interconnections, or high-level speaker inputs can be used.

• Slim profile
• Solid aluminum enclosure
• Wired bass remote
• Can get quite warm



The Kenwood KSC-SX11 is undoubtedly the smallest on the market, powered by seat subwoofer. This is the best choice if you drive a sports car or have a very limited amount of space to improve your overall sound system. With its dimensions of 11x 7.5x 2.8 (Lx Wx H) inches, it has the same size as a row of paper, making it easy to fit under any driver’s seat without removing any foot space from your passengers in the back seat. So for very tight spaces, it’s a very compact sub. However, don’t let this small size fool you!

You can’t expect a 12 “subwoofer performance from such a small unit, of course, but this little guy does a pretty good job despite his compact size. In the mid-lows, it gives a nice boost and fills the sound very well. A mediocre sound system is a solid choice to quickly improve and fill the low-end for a full, solid musical experience. With its peak power of 150 watts and 75 watts of RMS, it’s not a full-blown pro setup that rattles your windows or offers serious heavy kicks; however, this small sub can add a lot of depth to your music. Kenwood is a well-known audio brand name, and this sub will not disappoint you in terms of quality.

• Very compact size
• Great build quality
• Wired bass remote
• For larger cars, it may not be strong enough



If you’re looking for a serious bass but want to avoid the trouble of building your own system, the Rockford Fosgate P300-12 is a great all-in- one solution. One stop shopper will love! This small monster has a 12 “subwoofer and a powerful 300 Watt RMS amplifier. The P300-12 is therefore one of the most rocking subwoofers under the seat on my list. If you think this sub can add the bass you need to your sound system, you’re right, but it can add much more. If you want, this baby can get loud and low, enabling it to rumble and rattle your windows easily.

The P300-12 has a tight, clear, heavy bass, even at low gain, in addition to its serious pure power. Rockford is a well-recognized name and a trusted audio brand, so it’s no surprise that the sub has an impressive quality of construction. It has a durable enclosure with a metal grille that can easily resist scratches and teeth in the trunk. The protection against thermal and overvoltage ensures that the P300-12 will last long, and you’ll never have any problems with overheating. It has several controls, such as a built-in 0 ° / 180 ° phase switch and a 12db / octave low-pass crossover control, so that you can easily adjust the sound.

• Powerful sound with 300W RMS
• Heavy bass
• Quick-disconnect plugs
• Pretty large



If you are strapped for space and seeking something to install a subwoofer under the seat for your sports car or convertible with major space constraints, there is no better alternative. The Rockville RW8CA is now your car’s lowest profile, powered subwoofer. It can easily fit under any seat with 12.4x 11x 2.7 (Lx Wx H). It’s small and compact, but it packs a great punch. It is entirely made of metal, the construction seems to be tough, and the unit has a bluffness to it that makes you feel confident that it’ll last. Hopefully longer than your current romantic relationship, eh?

On top of that, it looks great. In turn, you don’t have to hide this little sub: you can even mount it in a visible place because it looks pretty sharp. The RW8CA is a great all-in-one solution with an integrated amplifier, so it’s easy and clean to install and wiring. It is compatible with all cars because it has low-level RCA inputs and high-level auto turn-on technology inputs. Thus, you don’t need a remote wire from your receiver to trigger the unit on and off using the high-level inputs, since the subsenses an audio signal is present and automatically switches on. An easy, breezy bet!

• Slick, muscular look
• Powerful sound
• Can go pretty deep
• Pretty large
• A bit pricey



This sub is just great as you’d expect from a JBL product. Yet let’s start with its most striking feature: it looks fantastic. It’s built into a solid black box with gray metal elements, so it appears so cool that you don’t want to hide it in your trunk. The speaker protective bars and the slipstream port give a slick, muscular look to the speaker. You can see it packs some serious power right off the bat. The GT-BassPro12 is a pretty big box, so if you want something compact, this sub is not for you.

It is by no means a slim device, as it takes up a considerable amount of space in your cabin or trunk, but it deserves every space with its great sound. You won’t face outstanding numbers by checking its pure specifications. It has a 12 “woofer powered by a 150W RMS and 450W max amplifier. But don’t let the low power rating fool you, as it slams much harder than you’d expect. If you crank it up, a thunderous bass can shake the car and rattle the windows. It can also play such low notes that you didn’t even know existed in your music. Ready to bust out some rap, anyone?

• It can easily fit under any seat
• Nice look
• Very good price
• Slightly lacks in the deeper lows



It has an extremely slim profile, so even if you drive a convertible with very limited space, you don’t have to give up the good bass.TS-WH500A is one of the slimmest subwoofers on the market with its 2-3 / 8 “height, so it’s a really good option if you’re looking for something under your seat or if you just don’t want a bulky box to take up any space in your cabin. The Pioneer’s engineers employed a unique, innovative technology called HVT to achieve this slim profile.

You don’t want a spacious box in your cabin. The Pioneer’s engineers utilized a unique, innovative technology called HVT to achieve this slim profile. HVT stands for horizontal vertical transformation, which means that the horizontal movements of the drivers are transformed into vertical movements, thanks to the unique linkage mechanism of the woofer. In turn, the subwoofer can have a significant reduction in physical depth while maintaining a higher excursion. The result is superior bass reproduction in the enclosure without destructive vibrations.

• All-in-one construction means no need for a separate amplifier
• Big bass sound in a small package
• Installation is a breeze
• Good value
• A bit hefty for its size.



If you’re after a booming bass that hits every bone in your body hard and rattles, you should definitely check this sub. Even its specs are impressive because it has a 12 “woofer powered by an amplifier with a peak output power of 400W RMS and 1200W. This is enough to create a window shaking experience in a compact car easily and strong enough to fill a larger SUV or truck with heavy bass. The RWS12CA is built into a well-designed, durable box and is without a doubt one of the best-looking subwoofers on the market, so you don’t have to hide it under a seat because it looks really slick.

With its 24 “L x 15” H x 6.65 “D dimensions, it will only fit under some pickup, truck seats, so many cars have to be installed in the trunk. It can be purchased with a full wire kit that contains everything you need for quick installation. The RWS12CA features a high- level quick- connect input with a smart turn on, so when you turn off your music signal, the amplifier automatically switches on.

• Well-built and meant to take a beating
• Reasonable price for the power
• Installation takes skill
• Prone to overheating if pushed too far



It has a long-lasting, slim-profile ABS enclosure that looks pretty good. Its compact case contains an 8 “woofer and an efficient Class D amplifier with a maximum power of 250W and 125W RMS, so it is definitely not the most powerful sub. Yet despite its size, it can produce an exceptional sound quality. Although it is not extremely loud, this sub provides a crystal clear bass with no distortion.

You can set the upper and mid-bass levels with a manual crossover control, as well as a bass boost and a volume controller. Unfortunately, the package does not contain a remote knob, so you can only purchase it separately. The BassPro SL has a robust woofer driven by an energy-efficient high-class amplifier that keeps the device cool, no matter how hard it is. For the flexibility of installation, a traditional low-level RCA and a high-level input can be supplied, it is super compatible with any car.

• Slim form factor means you can just slip it under the seat
• Will add a nice touch of bass to your system
• Designed for installation ease
• Low price makes this subwoofer a good option for entry-level car audiophiles
• Lacks the bass oomph of other subwoofers
• Not built for durability



They produce quality products from car audio to navigation and Alpine equipment can be found in a number of luxury cars such as BMW, Mercedes or Aston Martin. Not surprisingly, their subwoofer under the seat is also in the premium category. The Alpine Electronics PWE-S8 represents high quality, you can tell from the bat that this sub is very well built. The entire device is packaged in a solid aluminum chassis, so cheap plastic can’t be found anywhere. The integral package contains an 8 “subwoofer for quad coils and an amplifier with a maximum output power of 120W RMS and 240W.

This is not comparable to the power of a pair of 12-inch kickers, but it is definitely decent as we talk about a small, compact sub. The PWE-S8 is recommended for those who prefer quality over quantity because it has an impressive, rich, clean bass that does not shake your windows. However, it simply improves the sound of all your music. It measures only 13.5 “Lx 9 “Wx 3 “D (at the highest point) so that it fits under the back seat or driver’s seat invisibly. Another great feature of the Alpine PWE-S8 is that it has a bass controller included, so you can tweak the sub from the driver’s seat.

• Excellent sound and responsiveness
• Thick bass, lows without sounding distorted
• Affordable Price
• Requires some level of know-how or professional installation
• Better options available at higher price points.



The Kicker 11HS8 is the first compact subwoofer under the seat of the brand that promises a high frequency output in a small enclosure. Its body is just over three inches high and packs an 8 “woofer and a 150W RMS power amplifier. This power is enough for any stock audio system to add incredible depth and punchy bass. It can handle any type of music from rock to hip hop with its 25-120Hz frequency range. Since it’s an 8 “woofer, your heartbeat won’t stop, but it can add a lot of depth to your music and a well-balanced bass. The Kicker 11HS8 is a pretty heavy, solid construction, you can feel a ton of materials inside the beat.

Since it is still a relatively compact device, installing it even in tight spaces will not cause a problem and its fast connection plugs will make installation even easier. It features high-and low-level inputs with auto switching option, which makes it compatible with any factory or aftermarket systems. There are several adjustment options on the side of the device to tweak the woofer ‘s sound to your liking. It has a low-pass crossover, a bass boost variable + 6dB and a phase-cancel switch. You also get a remote bass level knob with the sub, so that you can easily adjust it to the music’s genre.

• Great for cars where space is at a premium
• Makes for a good addition to a well-balanced audio system
• Easy to install
• Pricey for the low power
• 8-inch speaker underwhelms
• Doesn’t come with RCA jacks

Buying Guide for the Best Underseat Subwoofer:

Media culture has accustomed us to the idea that you cannot really have an exhilarating driving experience, unless you listen to your favorite music at the same time. However, we have to recognize that not all drivers can concentrate to drive relaxed, while their attention is directed to sound.

For the lucky ones, the sound quality of the car’s integrated audio system counts, and one of the carefully chosen and praised parts for such an arrangement is the subwoofer diffuser. Inside a conventional system, this speaker plays the very low and extremely low frequencies, which produces a special music and sound quality, for example, by emphasizing bass from a melody.

Do you really want to know where car subwoofers are at a good price? Do not rush to make a decision until you review our performance indices for this product.


It can be incorporated or separated. If you want to avoid too many technical details when installing, but you prefer the sound to be heard as strong as possible, you will choose an active subwoofer. This piece includes a subwoofer speaker in the same acoustic enclosure with a sound amplifier integrated.

You may have some difficulty placing the model inside the car due to its size, and the cost of buying can be high. However, most insights on the best auto subwoofers will tell you that this is an extremely comfortable option for any user.

In the case of separate (passive) amplification, you can buy a simple speakerphone without the enclosure, which will be cheaper, but it requires a meticulous installation or a subwoofer with enclosure, in which case you need an amplifier outdoors or integrated into the car’s system, or purchased separately. If the amplification is integrated with the audio system, you must first see how you can connect the speaker to it (by dedicated output or just an auxiliary connection) and if it is compatible.

Dimensions and weight

It is quantified to decide how well the product chooses in the car and separates the subwoofers into three categories: small, conventional and large in diameter. You should not forget that the speakers of this type cannot be placed in the special places within your car, as is the case for the other car speakers.

We mention that the most demanding are the small parts, 200 – 300mm (8 – 12inch), because it consumes even less. If you have desires in terms of the intensity of the reproduced sounds, you can choose something 400mm (about 16 inches), but the consumption will increase and the space allocated will be higher.

Although there are even models of 22 inches or larger (560mm and above), we recommend such a purchase with caution, because it is wasted energy and will take your place in the trunk unnecessarily, attracting any complaints from those who don’t want to suffer from too many decibels. It’s up to you to see if your weight looks too high on a product, so choose something as easy as possible.

Technical indicators

These features include the following list: power, sensitivity, impedance and frequency response. The higher the sensitivity, the less power is needed to get clear and quality sound. If you have the built-in battery and the subwoofer offer a power RMS of max. 50W, make sure the piece guarantees a sensitivity of over 90dB. If it has external amplification or warrants more than the mentioned RMS value, the sensitivity may be lower.

For those who opt for a passive subwoofer, ie the one with external amplification, the impedance of the track (average between 2 and 8 ohms to any device in the market) and generally all connected speakers should be equal to or slightly higher than the one offered output amplifier for good compatibility.

Also, for a quality subwoofer, it is vital that a response in the lowest frequency is ideal. So, if that speaker covers, among others, parts or the entire 20-40Hz range, it means you will feel the bass vibrations, even if the sound is almost imperceptible.


Involves the enclosure and additional options in the construction. It is imperative that the subwoofer is a solid one if you buy it so equipped. If you choose a simple one and look for a separate room, you might risk making an inadequate combination, especially when you do not have too many technical capabilities.

One of the most notable features is the Bass Reflex, which greatly enhances the sound quality, requiring even lower RMS powers, even when the sensitivity is low. As a matter of principle, focus on buying such a loudspeaker.


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