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Buyers Guide & Information

Best 6x8 Speakers: Car Door Units Reviewed (For Bass)

Searching for the best 6×8 speaker? Our buyer’s guide will help you get your hands on the best sounding component and coaxial car door speakers.

by

Buyers Guide & Information

Best 6x8 Speakers: Car Door Units Reviewed (For Bass)

Searching for the best 6×8 speaker? Our buyer’s guide will help you get your hands on the best sounding component and coaxial car door speakers.

by PITeam

by PITeam

If you are a car karaoke superstar or just prefer to drown out the charming sounds of traffic, replacing the speakers that initially came with your car with higher quality speakers may be right for you. Although there are many types of vehicles, typically, a 6x8 speaker is the ideal choice for replacing built-ins. We will take a deeper dive into 6x8 speakers and look at the ten best on the market today.

Image

Product

Sensitivity

Frequency Range

Check Price

Infinity REF8622CFX 6X8 / 5X7 360W Reference...

Infinity REF8622CFX

93 DB

49-21,000 Hz

Alpine R-Series 6 x 8 Inch 300 Watt Component...

Alpine R-Series R-S68

89 DB

63-29,000 Hz

Pioneer TS-A6880F 6' x 8' 350 Watts Max Power...

Pioneer TS-A6880F

88 DB

34-34,000 Hz

Rockford Fosgate P1683 Punch 6'x8' 3-Way Full...

Rockford Fosgate P1683 Punch

90 DB

65-24,000 Hz

Rockford R168X2 Prime 6 x 8 Inches Full Range...

Rockford R168X2 Prime

87 DB

51-20,000 Hz

Infinity KAPPA 682.11cf

Infinity KAPPA 682.11cf

94 DB

40-25,000 Hz

CERWIN VEGA V468 6-Inch x 8-Inch 400 Watts...

CERWIN VEGA V468

94 DB

55-20,000 Hz

Kicker 40CSS684 6'x8' Component Speaker System

Kicker 40CSS684

90 DB

40-21,000 Hz

Alpine SPR-68

Alpine SPR-68

89 DB

63-29,000 Hz

JBL Stadium GTO860C 6x8' High-Performance...

1JBL Stadium GTO860C

93 DB

40-25,000 Hz

How Car Speakers Work

Car speakers at their core work just like any other speaker by moving back and forth according to electrical signals sent to it by the amplifier. 6x8 speakers are designed to sit in the door of a car and use the door enclosure as the box that often accompanies traditional speakers. It is important to have a tight seal for car speakers to ensure the best audio quality and not allow air to escape and cause sound loss.


Benefits of Upgrading Your Car Speakers

The speakers that come standard in most cars are not designed to be able to really highlight the various levels of bass or treble and are more general use. By upgrading your car speakers, you open up the possibility of deeper bass and clearer audio quality.

Aftermarket speakers are designed specifically for audio and do not have to fit the constraints of the auto manufacturer, who is also working on every other part of the vehicle. Choosing a specialized product will take your car audio to the next level.


Choosing Quality 6x8 Car Door Speakers

Sound Quality/Audio Performance

When selecting new speakers, it is essential to consider the elements of what makes for high-quality audio. A speaker’s sensitivity will tell you how well the conversion from the amplifier to the speaker occurs and how loud the speaker is at a given power.

Speaker efficiency ranges from 85db to 105db, with the higher end of the range being more efficient.  When looking at the frequency response, the lower the beginning of the range, the lower or deeper bass can be produced while the end of the range tells you how high a frequency can be produced.

Compatibility (with car sound system) & Amplification Requirements

When looking at upgrading your car speakers, it is important to note what your current set up is like and research what kind of power can be sent to the speakers. If you are uncomfortable with working with your existing system, there are many mechanics and online resources to help guide your understanding of what is possible.

Ease of Installation

Installing new car speakers will depend on the type of vehicle and your understanding of taking apart the enclosure and wiring. Crutchfield has a great general guide on installation that can help with an overview, and wikiHow has a visual guide as well. It is important to remember that if there is ever an issue to make sure you check your vehicle’s owner manual and to keep the number of a mechanic or dealership handy.

Build Quality & Design Aesthetics

While the sound quality is the most crucial factor in car audio upgrades, there are also variations in how the speakers are constructed. Some speakers will have a grille or mesh covering, whereas others are open.

An important factor in the quality of the speaker will be in the depth of the cone as well as the surround on the mount. Both of these will change how the speaker is mounted and impact the depth of sound provided by the speaker.

Power Rating/Handling (higher RMS Power Rating)

A relevant spec on speakers is power handling, which is often described as RMS, or root mean square, power handling. RMS is the amount of power that the speaker handles continuously and should not exceed that wattage due to the risk of damage.

Peak power is the limit to which the speaker handles bursts, and like the RMS can lead to damage if exceeded. When installing speakers, it is essential to note what wattage is being sent to the speaker and the RMS/peak range.

Price & Warranty

Car speakers are generally sold by the pair and can range in price from below $100 to close to $400 per pair. The range in price is due to many factors like sensitivity rating, frequency range, impedance, and power handling.

There are additional features with some speakers that can enhance your audio experience like smartphone apps or remote controls. Many speakers come with a warranty for component failures, but some are more specific to the part of the speaker the component belongs to.


10 Best 6x8 Car Door Speakers Reviewed

1. Infinity REF8622CFX

Our Top Pick

Power Handling (Peak Power & RMS rating)

60 watts RMS/ 180 watts peak power

Configuration/Design

2-way

Sensitivity

93 dB

Frequency Range

49-21,000 Hz

Nominal Impedance

3 Ohms

Warranty? If yes, how long

1 year

Topping the list as the best 6x8 car audio speakers overall are the Infinity REF8622CFX, which provides high-quality audio while still being compatible with almost all factory car stereos.

They may not offer the deepest bass of those on our list, but they do pack a punch with their Plus One+ polypropylene woofer cone combined with a hi-roll rubber surround. If you are looking for a bit more volume, you can also hook these up to an external amplifier for when your vehicle's factory power is not enough.

Although they do not come with a grille, they do have a sleek black design that could fit in, or the grilles from your previous factory speakers may also work. A textile dome tweeter helps hit the high notes with these speakers, and you will have an easier time finding the sweet spot thanks to its 1" size.

The textile material is used to help with higher power handling as well as helping to dampen sounds and keep a smooth and accurate flow. Combine that with the larger cone on these speakers, and the depth from the woofer will pair perfectly with the highs from the tweeter.

Although this model, in particular, is discontinued, you can find an updated version (8632cfx) with all of the same quality and a few more improvements.

Pros

  • On the larger end for cone size
  • High-quality materials for surround
  • Textile tweeter for a smoother sound
  • Fits many different vehicles

Cons

  • No grille included
  • This model is discontinued

2. Alpine R-Series R-S68

Best 6x8 Component Speakers

Power Handling (Peak Power & RMS rating)

100 watts RMS/300 watts peak

Configuration/Design

2-way

Sensitivity

89 dB

Frequency Range

63-29,000 Hz

Nominal Impedance

n/a

Warranty? If yes, how long

1 year

For the most customization when it comes to your audio experience, component speakers are the golden rule. The best 6x8 component speakers we found were the Alpine R-Series R-S68, which comes back by Alpine's long history of audio excellence. As these are component speakers, there is no attached amplifier, and the equalizer is external and able to be adjusted, so when installing, be sure to find an easy place for the slider.

These speakers will definitely pack a punch, so if you are looking for volume, these speakers can undoubtedly handle the power needed. Since they can handle up to 100 watts continuously and 300 watts at their peak, they will easily be able to handle the power coming out of a factory radio. In order to really get the full effect, you will want to invest in an outboard amp to take full advantage of the big sounds that these speakers are capable of.

Alpine did not slouch on the build quality either, packing these speakers with a hybrid fiber woofer, Santoprene rubber surround, and 1-inch silk dome tweeter. Installation is relatively simple and has eight points of contact to keep the speakers securely in place. They do have an external slider for the equalizer, so when installing, find a place where it is easily reached but will not get in the way.

Pros

  • Excellent power handling
  • Adjustable equalizer for more control
  • Capable of high volume

Cons

  • No included grille
  • Lower sensitivity than others

3. Pioneer TS-A6880F

Best Four Way 6x8 Speakers

Power Handling (Peak Power & RMS rating)

80 watts RMS/350 watts peak

Configuration/Design

4-way

Sensitivity

88 dB

Frequency Range

34-34,000 Hz

Nominal Impedance

4 Ohms

Warranty? If yes, how long

1 year

While you do get more customization using a component speaker, the proper coaxial speaker can provide an experience to rival it. Pioneer's TS-A6880F pack two tweeters into their carbon and mica reinforced cones to give a broader range of sounds emphasizing the highs and lows in your favorite songs.

Backing up the two tweeters are the bass and mid-range cones to cover all the sounds that can be pumped through these speakers as they can get loud with their 350 watts peak. That makes this Pioneer setup the best four-way 6x8 speakers.

Pioneer's unique Open & Smooth sound concept is their method of smoothing out transitions between the various drivers to make the changes sound seamless. As car speakers are often not pointed directly at a listener's ears, it is vital to have smooth transitions, so everyone gets the full range of sounds. While there is some compromise in lower sensitivity, the frequency range helps to make up for some of the loss in audio clarity.

Pioneer also tries to simplify installation and evaluation by providing original equipment installation adapters for Ford and Mazda vehicles. They also offer their CarSoundFit app for Apple and Android to help simulate through your phone what the different speaker systems can sound like in your vehicle.

Pros

  • 4-way speaker covers a larger frequency range
  • High peak power handling allows bigger bursts
  • Simulation app to help simulate system before purchase

Cons

  • On the lower end of the sensitivity scale
  • Installation equipment is focused on Ford/Mazda models

4. Rockford Fosgate P1683 Punch

Best Rated

Power Handling (Peak Power & RMS rating)

65 watts RMS/130 watts peak

Configuration/Design

3-way

Sensitivity

90 dB

Frequency Range

65-24,000 Hz

Nominal Impedance

4 Ohms

Warranty? If yes, how long

1 year

Even though you should not make any judgments off just the name, when you are looking at car audio, Rockford Fosgate is an institution producing some of the best speakers for over 30 years. The P1683 Punch continues their tradition of excellence. It shows their customer-first attitude out of the gate with a budget-friendly $80 price tag and unique Flex Fit basket to help make installation as easy as possible in any vehicle.

The Flex Fit basket uses slots instead of holes in case the original factory installation was not set up traditionally. With an integrated concealed crossover, you do not have to worry about mounting anything outside of the speaker, either.

The P1683 may not be the loudest speakers on the market, but they strike a delicate balance between volume, clarity, and range with this entry. The speakers hit the full range packed into an injection-molded mineral-filled polypropylene cone in which is nested the polyetherimide dome tweeter allowing for some dampening to keep the music level clear.

A butyl midrange rubber surround finishes off the build to keep the enclosure secure and airtight to avoid any sound loss. Rockford Fosgate earns our best rated 6x8 speaker spot with the P1683, and it is no surprise that they made another spot on our list.

Pros

  • Easy installation
  • Budget-friendly
  • Balanced range, volume, and clarity

Cons

  • Not the one for people looking for power

5. Rockford R168X2 Prime

Best Budget 6x8 Car Speaker

Power Handling (Peak Power & RMS rating)

55 watts RMS/110 watts peak

Configuration/Design

2-way

Sensitivity

87 dB

Frequency Range

51-20,000 Hz

Nominal Impedance

4 Ohms

Warranty? If yes, how long

1 year

If it seems like you were just reading about how budget-friendly Rockford Fosgate speakers can be, then it is no surprise that our best budget 6x8 car speaker goes to another of their models, the R168X2 Prime. Packing in a little less power than the Punch line of speakers, they do hold their own at just under $50.

For those looking to start looking at enhancing their car audio experience but are not sure about how big an investment to make, these are a perfect starting off point. These will certainly be a step up from any factory speakers and, given that they are a quick and easy install, could be the start of a life-long audio journey.

As these have a bit lower power handling than other speakers, they are easily powered by the factory radio in most vehicles. They can be used to their fullest without an outboard amplifier. They have a narrower range but can still pump out some deep bass and hit the high notes better than any stock system.

These are 2-way coaxial speakers, so the bass cone and silk dome flush mounted tweeter are used to hit the full range without any additional parts.

Pros

  • Very budget and beginner-friendly
  • Beats out stock systems
  • Does not need any additional amplifier

Cons

  • Narrower frequency range
  • Not as powerful as more expensive systems

6. Infinity KAPPA 682.11cf

Best 6x8 Speakers for Mids and Highs

Power Handling (Peak Power & RMS rating)

100 watts RMS/300 watts peak

Configuration/Design

2-way

Sensitivity

94 dB

Frequency Range

40-25,000 Hz

Nominal Impedance

2 Ohms

Warranty? If yes, how long

1 year

For those who really want a system that will pump out crystal clear audio at high volumes, the Infinity Kappa 682.11cf packs a whole lot into their 2-way coaxial entry.

Without sacrificing sensitivity, the Kappa 682.11cfs can support not just the factory radio power but also can take full advantage of an outboard amplifier for those looking to really let loose. With the ability to handle higher levels of power, there is a much lower risk of damage to the speakers from use.

The Kappa 682.11cf uses a unique carbon glass matrix frame to achieve a balance between strength and weight while keeping rigid enough to withstand whatever the road throws at you. Similar to the Infinity REF8622CFX reviewed earlier, the Kappa 682.11cf takes advantage of the Plus One woofer-cone technology to offer more speaker-cone and allow for more air to flow.

The tweeter Is a soft-dome fabric material that helps to balance out any distortion at higher volumes, and the tweeter can even be pointed to a more effective direction thanks to Infinity's UniPivot feature. By allowing the tweeter to be adjusted, it makes installation a bit easier in cases where the mounting area may not be the most ideal for sound quality.

Pros

  • Adjustable tweeter
  • High-quality build
  • Can handle higher power than other models
  • Plus-One woofer-cone allows for more airflow

Cons

  • Needs external amplifier to take full advantage of all features

7. CERWIN VEGA V468

Best Coaxial 6x8 Speakers

Power Handling (Peak Power & RMS rating)

75 watts RMS/400 watts peak

Configuration/Design

2-way

Sensitivity

94 dB

Frequency Range

55-20,000 Hz

Nominal Impedance

4 Ohms

Warranty? If yes, how long

1 year

If you are looking for a great all in one audio solution, the Cerwin Vega V468 is our choice for the best coaxial 6x8 speakers for a good reason. Boasting an impressive sensitivity rating, the V648 speakers are all about delivering clear audio with a punch.

While the 75 watts RMS rating is not going to need an outboard amplifier, you could get the most of these speakers at their peak power with one. These speakers are really going to shine in the midbass to deep bass sections, but they can still pump out clear audio in the highs but not quite as high as some of the other speakers reviewed.

Made of a mica fiber composite cone, these speakers stand out with their Vega Red rubber surround and will definitely pop visually. The tweeter is a 1-inch titanium dome style tweeter that stays rigid to avoid any distortion.

Since it is not a textile material, there is some loss in transitions between highs and lows, but this should not really be noticeable. The cones are designed with a curvilinear shape to support off-axis performance, which is an important factor when upgrading a car audio system due to the available positions for speakers.

Pros

  • Clear audio thanks to a great sensitivity rating
  • High peak power handling
  • Curvilinear shaped cones for off-axis performance
  • Great budget speakers

Cons

  • Red rubber may not fit with design aesthetic
  • Narrower frequency range than others

8. Kicker 40CSS684

Best 6x8 Speakers Under $100

Power Handling (Peak Power & RMS rating)

75 watts RMS/225 watts peak

Configuration/Design

2-way

Sensitivity

90 dB

Frequency Range

40-21,000 Hz

Nominal Impedance

2 Ohms

Warranty? If yes, how long

1 year

Balancing budget, customization, and quality, the Kicker 40CSS684 is a component speaker system with separate woofers, tweeters, and crossovers for just under $100. The installation will be a little trickier as you will need to make sure that you can mount all the different components on your vehicle, so before purchase, it is probably best to make sure this system is compatible with your vehicle.

Crutchfield sells universal back straps and can help figure out if speakers like these will work for your car in the factory spots. Like with other component speaker systems, you will also want to be mindful of where you place the crossovers so you can easily access them to adjust the tweeter level settings.

The woofers are built to last with a polypropylene base, and polyester foam surrounds to deliver deep bass. The tweeters are ¾ inch titanium dome tweeters constructed to handle the instrumental details of your music. The crossovers come with settings for 0, +3, and +6dB.

Each speaker has its own crossover so passengers can adjust the tweeter level nearest them as well for optimized audio. Though it requires a little more set up, the Kicker 40CSS684 has a lot of options for those willing to spend the time tweaking their settings.

Pros

  • Customizable
  • Budget-friendly
  • Quality construction

Cons

  • More difficult installation (may require extra parts)

9. Alpine SPR-68

Best Sounding 6x8 Speakers

Power Handling (Peak Power & RMS rating)

100 watts RMS/300 watts peak

Configuration/Design

2-way

Sensitivity

89 dB

Frequency Range

63-29,000 Hz

Nominal Impedance

4 Ohms

Warranty? If yes, how long

1 year

The predecessor to the Alpine R-Series R-S68 that won our best component 6x8 speaker spot, Alpine's SPR-68, cranks it up to 11 as well. Able to work with a factory car stereo, they also benefit from an outboard amplifier to take full advantage of their 100 watts RMS and 300 watts peak power handling rating. These speakers are also designed to fit with nearly any factory speaker placement.

The exceptional ridged surround that is known for its performance on Alpine subwoofers has been adapted for these speakers to give extra cone movement, pushing out more air than competitors and producing a louder, deeper sound.

On the higher end, the tweeters are a silk dome-style to smooth out any shrillness and can be adjusted to point to the optimum location for listening thanks to their swivel feature. These speakers do boast the ability to hit the higher end of the listening spectrum, so these tweeters put in work, and it shows.

Alpine has discontinued this particular model, but you can still find some on the market. If you are unable to find them, the Alpine R-Series R-S68 is the next in the model line and provides comparable sound quality and volume at a higher price.

Pros

  • Adjustable tweeter position
  • Work with factory stereo and external amplifier
  • Subwoofer like surround

Cons

  • Discontinued model

10. JBL Stadium GTO860C

Top of the Range - Best for Bass

Power Handling (Peak Power & RMS rating)

100 watts RMS/300 watts peak

Configuration/Design

2-way

Sensitivity

93 dB

Frequency Range

40-25,000 Hz

Nominal Impedance

2.5 Ohms

Warranty? If yes, how long

1 year

Rounding out our top ten list are the GBL Stadium GTO860C speakers, which do come with a hefty price tag, but they back it up with deep, clear bass. JBL is known for its products in recording studios, concerts, and theaters, and that same passion for loud, clear, dynamic audio is present in their auto speakers.

These speakers are an audiophile’s dream with high sensitivity, low impedance, and power handling that works with factory stereos or outboard amplifiers.

The speakers themselves are made from a glass-fiber woofer cone with hi-roll rubber surrounds that provide the rigid support needed when listening at high volumes. That rigidity also helps keep the bass distinct, and you will feel every hit from these speakers.

The tweeters are made with a dome design as well to help keep the high notes sharp and prevent distortion when you inevitably need to crank the volume. The tweeters also have a level control button to adjust levels according to your preference.

Where these speakers really shine is the sheer surface area of the cone, allowing the bass as much airflow as possible to do their work. These may not be for the faint of heart, but when you have a set of these in your car, you will not mind being stuck in traffic a little longer with your favorite songs.

Pros

  • High-quality materials
  • Deep bass
  • Clear sound
  • Adjustable levels for tweeters

Cons

  • More expensive than most others

Coaxial Car (Full-Range) Speakers vs. Component Speakers

When looking at upgrading your car audio, you may find speakers listed as coaxial and others as component. Simply put, a coaxial speaker will have all of the components within one structure. In contrast, a component speaker will not have everything attached and allows for a little more customization in placement.


Installing 6x8 Car Door Speakers

Replacing the factory speakers in your car may seem daunting at first (and there are professionals who can do it), but many speaker systems are made with self-installation in mind. Crutchfield's video guide is an excellent starting point for any DIY project.

Before starting any installation, it is crucial to note which tools will be needed, though generally, you will need a screwdriver (with applicable head) and if you need to drill any extra holes, a drill with a short bit.


Tips to Better Car Audio Quality

The first step many people take in improving their car audio is either replacing the factory speakers with new 6x8s or adding a subwoofer mounted in either the trunk or the door of the car. These are great first steps, and since most 6x8s on the market come in pairs, you can have the front driver and passenger doors upgraded pretty quickly.

If you want to take it to the next level, additional 6x8s in the rear driver and passenger sides are an easy upgrade. You may also want to look at upgrading the stereo system itself with something aftermarket and may include an external amplifier to really get those speakers bumping.


Accessories for 6x8 Car Speakers

  • Grill Covers
    To easily add an extra layer of protection to your speaker investment, you can purchase grill covers to cover up the opening of the cone with a thin mesh layer. Something simple like these from Alpine are unobtrusive and keeps the aesthetic of many speakers.
  • Speaker Brackets
    When installing your new speakers, if you notice that the space is too large for your speakers, you can invest in speaker brackets like these to fill the gap and ensure a secure fit.
  • Speaker Adapter
    Depending on the make and model of your vehicle, you may note that the hookups for the preinstalled speakers do not match with your new speakers. Adapters like these for Ford models can help make sure everything functions properly.
  • Speaker Boxes
    In case you would rather mount the speakers somewhere other than the door, you can add speaker boxes to hold your new speakers in place elsewhere in the vehicle.

Frequently Asked Questions

What determines the sound quality of car speakers?

There are a few factors in sound quality, but the most important are frequency range, sensitivity, and impedance.

Where is the best location to place these car speakers?

It is generally best to place car speakers in the same spot as the ones you are replacing, typically in the doors near the bottom.

What are the best rated 6x8 speaker brands?

The best rated brands are Alpine, Rockford Fosgate, and JBL currently. We think you'll be satisfied with any of the brands and models listed here.

Will a 6x8 speaker fit in a 6x9 slot?

Depending on the speaker, you may be able to with some adjustments on the mounting, or with spacers or brackets. It will likely come down to trial and error.

What are the differences between a 2-way and 3-way speaker?

A 2-way speaker has two drivers with one going into the tweeter and one into the low/mid-range frequency speakers while a 3-way speaker will have three drivers for the tweeter, low range speakers, and the mid-range speakers.

What can you expect from the different 6x8 car speaker price ranges?
  • Under $50: You will likely find lower frequency ranges and acceptable but lower sensitivity ratings.
  • $50-$100: In this range, you can expect a good frequency range, sensitivity rating, and better power handling to help with the life of the speakers.
  • Over $100: When looking over $100, you will see improvements in the frequency range, sensitivity, power handling as well as additional levels of adjustment and customization.

Conclusion

For music lovers, you cannot go wrong with upgrading your car audio system. An easy first step is replacing the factory speakers with a new set of 6x8 speakers, and we recommend the Infinity REF8622CFX as our best 6x8 car speaker choice. The quality and price are an excellent balance for those looking to upgrade, and they are built to last with high-quality materials.

Images from:
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