7 Best 8-Inch Car Subwoofers – Reviews & Buying Guide

Best 8 Inch Subwoofers

If you are a car owner, then a car subwoofer will add a level of harmonics to your music that you cannot find in factory fitted speakers. Indeed, a subwoofer is an important audio component that any music lover should own. 

However, one problem many car owners face when installing subwoofers is size. Most subwoofer enclosures tend to be big and consume a lot of space. If you own a small car, with a small boot, it is challenging to install a 15-inch woofer.

One way around this problem is using smaller 8-inch car subwoofers. They still deliver excellent performance despite their smaller size and will easily fit in the boot of a small car. 

If you are on the lookout for 8-inch car subwoofers, we have done all the research for you! Here is our hand-picked selection of some of the best models on the market.

Product Name

Power Handling

Impedance

Resonant Freq

Rating

Current Price

1. Boss Audio CXX8 8-Inch Car Subwoofer

600 W

4 Ohms

49 Hz

4.0

2. JBL Stage 810 8-Inch Car Audio Subwoofer

800 W

4 Ohms

38 Hz

4.7

3. Rockford Fosgate P3SD2-8 8-Inch Car Subwoofer

300 W

2 Ohms

38 Hz

4.8

4. Rockville RW8CA 8-Inch Under-Seat Car Subwoofer 

600 W

2 Ohms

29 Hz

4.4

5. Planet Audio AC8D 8-Inch Car Subwoofer

1200 W

4 Ohms

39 Hz

4.0

6. Alpine PWE-S8 Restyle Compact 8-Inch Car Subwoofer

240 W

4 Ohms

50 Hz

4.4

7. Rockford P3SD48 Shallow Mount 8-Inch Car Subwoofer

300 W

4 Ohms

39 Hz

4.0

#1. Boss Audio CXX8 8-Inch Car Subwoofer 

Editor's Rating: (4 / 5)

Boss Audio CXX8 8-Inch Car Subwoofer
  • Power Handling: 600 Watts
  • Impedance: 4 Ohms
  • Sensitivity: 83 dB
  • Resonant Frequency: 49 Hz

Boss Audio CXX8 is the most affordable woofer solution for this review. Despite its small price, it is still a quality woofer that is well-built and can output a satisfactory bass sound.

It has a little problem going down on the ultra-low frequencies below 49 Hz because of its high resonant frequency, but for general purpose music playback, this is hardly a problem.

The installation for this woofer is quite easy for even beginners. Furthermore, this is a sealed enclosure woofer so you will get a punchy bass that is excellent for almost every type of music.

Overall, we think that this is a good purchase for everyone on a low budget and still require a decent and performing woofer.

Pros:

  • Extremely affordable. Value for money
  • Good overall performance
  • Easy to install

Cons:

  • Below average resonant frequency. Has difficulty reproducing very low frequencies.

#2. JBL Stage 810 8-Inch Car Audio Subwoofer  

Editor's Rating: (4.7 / 5)

JBL Stage 810 8-Inch Car Audio Subwoofer
  • Power Handling: 800 Watts
  • Impedance: 4 Ohms
  • Sensitivity: 88 dB
  • Resonant Frequency: 38 Hz

The JBL Stage 810 is a popular model. It has an excellent build construction with superb specs throughout. It is also relatively affordable and offers a lot of value.

For one, it has a sensitivity of only 88 dB, which means that it requires less power to operate. Low-end amplifiers will have no problem powering this woofer up. The sound is also loud and clear, just as you would expect from a quality subwoofer.

You can even play it at high volumes and not worry about damage or cone puncture as the cone is made from polypropylene.

Further, the cone surrounds are made from an elastic rubber that gives it better frequency responses. Thus, it can reproduce low frequencies with high-fidelity and without distortions. 

Pros:

  • High-quality build construction. Durable
  • Fairly affordable. Good value
  • Loud and powerful speaker

Cons:

  • Requires break-in time to sound good. 

#3. Rockford Fosgate P3SD2-8 8-Inch Shallow Mount Car Subwoofer 

Editor's Rating: (4.8 / 5)

Rockford Fosgate P3SD2-8 8-Inch Shallow Mount Car Subwoofer
  • Power Handling: 300 Watts
  • Impedance: 2 Ohms
  • Sensitivity: 82 dB
  • Resonant Frequency: 38 Hz

The Rockford Fosgate P3SD2-8 is definitely one of the most interesting 8-inch subwoofers in this review. It is a well-constructed unit that is built to last.

Further, the low impedance of 2 Ohms allows the user to use very thin audio cables when making the connections. Something that most other subwoofers do not allow.

Although, this isn't the most powerful subwoofers we have in this review. Its power handling of 300 Watts is still a respectable number and this unit should be able to play loud and clear when necessary.

Moreover, it comes equipped with a dual voice coil (DVC) for better musical clarity. There are also more customization options and versatility with this subwoofer when compared to other models.

All in all, we can safely recommend the Rockford Fosgate P3SD2-8 to anyone who likes to tweak their music for a personalized soundstage. 

Pros:

  • Versatile. More connection output for tweaking
  • Dual voice coil (DVC)
  • Shallow mounting depth of 2-11/16 inches

Cons:

  • A little expensive

#4. Rockville RW8CA 8-Inch Low Profile Under-Seat Active Powered Car Subwoofer

Editor's Rating: (4.4 / 5)

Rockville RW8CA 8-Inch Low Profile Under-Seat Active Powered Car Subwoofer
  • Power Handling: 600 Watts
  • Impedance: 2 Ohms
  • Sensitivity: 100 dB
  • Resonant Frequency: 29 Hz

If we have to elect one of the best 8-inch car subwoofers in this review, it would have to go to the Rockville RW8CA. Rockville definitely knows how to make a quality speaker and this unit is grand proof of this.

But what really demarks this woofer from the competition is its high sensitivity of 100 dB and its compact form factor. With a higher sensitivity, the Rockville RW8CA can play loud with less power. Its compact size makes it sit flush and easy to install under a seat, for example.

The high sensitivity is a good thing since it has an internal amp that is smaller than a dedicated unit. Therefore, it is much more power efficient than other models and doesn't require a high-end amp to play loud.

It even has thermal and short circuit protection. This shows that Rockville made this unit as a heavy-duty subwoofer that can output a clear bass for an extended period. If you are the type to abuse your woofers at high volumes, this is a good woofer that will not disappoint. 

Pros:

  • Pre-amped model. Does not require an external amp
  • High sensitivity of 100 dB. More power efficient
  • Compact and low profile

Cons:

  • Bass is a little quiet compared to other models

#5. Planet Audio AC8D 8-Inch Car Subwoofer

Editor's Rating: (4 / 5)

Planet Audio AC8D 8-Inch Car Subwoofe
  • Power Handling: 1200 Watts
  • Impedance: 4 Ohms
  • Sensitivity: 85 dB
  • Resonant Frequency: 39 Hz

Considering its big peak power of 1200Watts and its relatively affordable price, we have to say that the Planet Audio AC8D is an excellent and value for money woofer.

You will need to find an enclosure for this unit, as it is delivered as a standard woofer only.

The cone is made from polypropylene and it sports a 2-inch voice coil for clarity and better midrange frequencies.

Moreover, it has a respectable sensitivity of 85 dB making it work well with any amp, even with pre-amps in your DIN device. Its resonant frequency of 39 Hz makes this little puppy work at very low frequencies, ideal for listening to music like electronic or techno.

All in all, if you are looking for a standard woofer speaker then the Planet Audio AC8D comes highly recommended! 

Pros:

  • Good price. Value for money
  • Powerful and loud woofer
  • Large 2-inches voice coil for clarity

Cons:

  • Not the best build quality
  • Requires an enclosure

#6. Alpine PWE-S8 Restyle Compact Powered 8-Inch Subwoofer        

Editor's Rating: (4.4 / 5)

Alpine PWE-S8 Restyle Compact Powered 8-Inch Subwoofer
  • Power Handling: 240 Watts
  • Impedance: 4 Ohms
  • Sensitivity: N/A
  • Resonant Frequency: 50 Hz

The Alpine PWE-S8 is a compact woofer solution that has unparalleled sound quality. Afterall, this is a woofer made by one of the greatest names in the audio industry.

It contains a prebuilt amplifier that can power the 240 Watts speakers like a champ. It produces a clean and fairly loud bass that is excellent for any type of music. In terms of build quality, it is second to none. This is a model that has been built to last.

Due to its small and compact nature, it can be placed anywhere in the car, from the car boot to under the seat. Despite being so small, there is a fair level of tweaking like bass gain or LP filter for music customization.

This is a small, high-quality and versatile 8-inch car subwoofer that we have no problem recommending! 

Pros:

  • Best build quality in a subwoofer so far
  • Small and compact. Easy to install
  • Customization options at the back

Cons:

  • High resonant frequency. Has difficulty with very low-frequency ranges
  • Expensive

#7. Rockford P3SD48 Shallow Mount 8-Inch Subwoofer

Editor's Rating: (4 / 5)

Rockford P3SD48 Shallow Mount 8-Inch Subwoofer
  • Power Handling: 300 Watts
  • Impedance: 4 Ohms
  • Sensitivity: 82 dB
  • Resonant Frequency: 39 Hz

The Rockford P3SD48 definitely wins our heart in this review. It has an exceptional built quality and delivers the best performance out of any other woofer.

One of the good things about the Rockford P3SD48 is its versatility. It is a standard woofer delivered without an enclosure, but it offers a high level of convenience.

For one, even if it is rated as a 4 Ohms woofer, it can use smaller 2 Ohms wires with no problem.

Secondly, despite being only 300 Watts, it plays on par or louder than higher rated woofers mostly because it is so efficient.

We also like the fact that it is a flush mount woofer that does not require a deep hole. Additionally, it should not be very hard to make an enclosure for this unit.

All in all, if you need the best 8-inch car subwoofer and do not mind a little DIY work, the Rockford P3SD48 is unbeatable both in terms of performance and value.

Pros:

  • Superb built quality
  • Loud and powerful enthusiasts grade woofer
  • Energy efficient unit

Cons:

  • Expensive
  • Requires an enclosure and may not fit a car factory enclosure without modification

How to Buy an 8-Inch Subwoofer

How to Buy an 8-Inch Subwoofer

To purchase the best 8-inch car subwoofer for the money, there are some important things to consider.

#1. Power Handling

There are 2 types of power mentions when buying subwoofers. They are the peak power and the RMS rating. The RMS rating is the actual power that the subwoofer can use to produce a sound.

The peak power is the maximum power the woofer can handle at any given time.

Both values are important and tell you how powerful the woofer actually is. Generally when it comes to power handling, the higher the value the better.

#2. Amplifier

Some models of 8-inch woofers have a pre-build amplifier to make it sound clearer and louder. While this is very convenient, it is not as powerful and will never produce a bass as powerful and deep as a dedicated amplifier.

You will need to choose based on your need. If you require a very powerful sound and deep bass without distortions, it is always better to buy a standard subwoofer and connect it to an amp.

#3. Resonant Frequency

The resonant frequency is the minimum frequency that the woofer can resonate to before it produces distortions.

As a rule, the lower the resonant frequency of your 8-inch subwoofer the better. As this woofer is able to produce a deeper bass and covers a wider range in the low-end spectrum of musical frequencies.

#4. Dual Voice Coils

Voice coils are responsible for reproducing the mid and higher range frequencies. While most woofers have a single coil, a dual coil system, (DVC) is better as it produces clearer sounds and has more output connections for versatility.

If you are the type who likes to tweak your music to your liking, then a DVC subwoofer is the way to go. Otherwise, a single voice coil is enough.

#5. Impedance

The impedance is the electrical resistance of the woofer. A higher impedance of 8 Ohms means that the woofer requires a thicker wire to produce a certain sound at a certain frequency.

In general, 4 Ohms is an okay impedance and most factories fitted audio wires in your car is more than enough for the connection wiring.

2 Ohms is even better, as this means that you can now use much smaller and more discreet wires to make the connections.

#6. Enclosure Size

Despite all 8-inch car subwoofers have the same cone size of 8-inch, their enclosures may vary. Keep an eye out on the overall size of the woofer to make sure that it will fit your boot or sit under your seat.

Moreover, you can even purchase a standard subwoofer that does not come with an enclosure and make your own. A woofer enclosure is usually made from MDF and is not very hard to make for anyone who loves to DIY.

Conclusion

8-Inch car subwoofers are one of the smallest car subwoofers you can purchase. They will easily fit inside a small boot and still manage to deliver amazing sound performance when connected to a matching amp.

Best, some models can so slim and compact that you can even tuck them under your seat for some interesting bass effects.  Moreover, you can get creative and connect multiple 8-inch subwoofers together for a more powerful signature sound. The sky is the limit!

As we can see, this is a versatile subwoofer size for every budget and usage. If you are unsure about which model to get, go through our subwoofer list one more time.