Best 6.5″ Coaxial Car Speakers in 2024

Why Trust Our Opinion on Car Speakers?

CarAudioNow is an award winning automotive blog, founded and built from the ground up by car enthusiasts over a decade ago. Between our editor, Kameron, and a few selected qualified writers, we’ve installed and tested a wide variety of speakers in cars, boats, golf carts – you name it. We know our speakers, how they should sound and perform and what’s a good value for your dollar. We get our hands on every product that we test in person – many of which are purchased and some provided by a manufacturer. It’s a combination of these tests and extensive research that lead us to our recommendations. And we’re frequently testing new speakers for our lists.

CarAudioNow and its writers don’t use AI to throw regurgitated information about a few car speakers on a list and say they’re “the best” either. We’re focused on providing meaningful lists, with accurate and useful information that will help you make an informed decision on a product. And we do this because we genuinely enjoy or highly regard the stuff we add to our lists. Our readers and our reputation are both more important to us than a quick buck or the top rank on Google – although both of those would be nice! Read more about how we choose our top lists here.

Best Overall 6 1/2″ Coaxial Car Speaker Pick

Focal PC 165 FE

Focal PC 165 FE Review

One glance and you’ll want to hear these speakers from Focal. The PC 165 FE is our pick for the best overall 6 1/2 inch coaxial speaker. The flax-fiber woofer cone has a unique textile look to it that gives it a high-end appearance. The speakers back up the high-end appearance with a smooth and natural sound that is unique to a flax-fiber woofer.

We’ve always loved Focal products. We’ve featured their products in various best lists for years now, including our list of best 6.5” component speakers. Before the PC 165 FE we had the K2 Power. A list of recommended car speakers should never exclude a few brands, one of them is Focal.

Woofer Design

Naturally, a Flax Evo series speaker like the PC 165 FE features Focal’s flax woofer cones. Flax creates an acoustically ideal surface because the channels in the material dampen vibrations. It’s around half the weight of traditional fiberglass but maintains some of the same features like rigidity. It’s one of the unique materials Focal uses that you won’t find on many other speakers.

The flax cone can only do its job so well because of a unique surround design though. Focal calls it’s surround design TMD for ‘tuned mass damper.” The surround allows the rigid woofer to move effortlessly and without flexing. This combination of parts provides the speaker with its unique sound and precision.

M-Profile Tweeter

The unique architecture of the inverted dome tweeter also contributes to the warm sound of the Focal PC 165 FE speakers. The M-shaped profile softens the highs and keeps the speakers from sounding too harsh. The recessed location in the center of the woofer cone helps to break up directionality for a more filling sound too.

High-end Frame and Basket

At Focal, details are not missed, even when it comes to the frame. It’s made from a magnesium and aluminum alloy and laser engraved. Precision, precision, precision.

Power Handling and Performance

Focal rates these coaxial speakers at 70 watts RMS with a peak of 140 watts. Like a few other options on our list, these speakers benefit from a good amplifier but don’t necessarily require it. The sound gets better with a good bit of power behind it though. These speakers have a frequency response that hits between 60 and 28k Hz to cover the ideal audible range.

Key Features
ModelPC 165 FE
Size6.5″ Coaxial
Power (RMS)70 watts
Power (Peak)140 watts
Frequency Response60 – 28,000 Hz
Sensitivity90 dB
Reasons to Buy
  • Excellent warm and natural sound with clear midrange
  • High-end look that is hard to cover up with a grill
  • Made from only the best materials
Reasons Not to Buy
  • Difficult to fit in some locations due to larger-than-standard cutout size

Best Entry Level 6.5″ Coaxial Speaker

Morel Tempo Ultra Integra 602 MKII

Morel Tempo Ultra Integra 602 MKII Review

There is a lot to love about Morel speakers and they consistently end up on our “Best of” lists. The former Tempo Ultra Integra 602 was one of our favorites, so we were excited to check out the updated MK.II version. The new model looks almost the same and has basically the same specs but has a few small changes that make the updated version even better than the original.

Time Phase Alignment

One of the things that Morel does to enhance the audio quality is to develop products that provide the proper phase of music. The Tempo series uses a recessed tweeter that is designed to work with the woofer cone to ensure perfect time alignment. This makes your music smoother and more controlled.

Concentric alignment with the woofer cone allows the speaker to perform consistently across all frequencies without losing frequencies or introducing distortion. The result is clean, clear, lively audio that is realistic and life-like to create a dynamic sound stage.

Woofer and Tweeter Construction

Typical coaxial speakers combine the woofer and tweeter, which works fine, but sacrifices some tonal values and leads to a muddy mixture of high and low frequencies. What Morel did was to recess the tweeter and mount it separate from the woofer cone.

The woofer cone is made from treated pressed paper which provides great rigidity and helps these coaxial speakers deliver a warm sound. Not so good for damp environments though. The 1-inch silk tweeter adds to the audio quality by producing softer high frequencies without harshness.

By lowering the rim of the tweeter, Morel was able to properly align the frequencies coming from both speakers to produce a natural, full, and aligned sound.

Oversized Magnet

The speaker carries a massive magnet that is selected by Morel specifically to enhance precision and, of course, volume. But the design is also engineered to reduce heat even at high volumes, which is always a good thing.

Built-in MXR Crossover

The highly acclaimed MXR crossover built right into the loudspeaker. The design lets the proper frequencies be split off to the tweeter or the woofer with nearly no loss throughout the frequency band and ensures you get the cleanest and most powerful sound without the bulk of traditional passive crossovers. The design keeps everything clean and out of sight.

Power Handling and Ideal Uses

Not only do these speakers sound amazing, but they can also handle a ton of power. To get the most from these speakers, you’ll want to use a high quality amplifier. Morel rates them to handle 110 watts RMS with a peak of 220 watts. The speakers can reproduce frequencies between 50 Hz and 22,000 Hz. That covers all the audible frequencies your ear can hear. These speakers are excellent for use as rear fill speakers particularly in the doors where they help to blend and balance mid and bass frequencies. They also make an excellent choice for front speakers to help create a truly dynamic sound stage with proper phase shifting for a natural sound. These speakers measure larger than typical 6.5” speakers. The Mk.II versions are even slightly larger than the first gen models and will require modifications on many cars.

Key Features
ModelTempo Ultra Integra 602 MKII
Size6.5″ Coaxial
Power (RMS)110 watts
Power (Peak)220 watts
Frequency Response50 – 22,000 Hz
Sensitivity90 dB
Reasons to Buy
  • I
  • Incredibly detailed tones with a natural feel
  • Sounds even better when mated to a high-quality amplifier supplying around 100 watts
Reasons Not to Buy
  • Technically a 6.75” speaker, so could require modifications
  • Mid-range frequencies can be muddy when the speakers don’t have enough power
  • Paper cones can lack long-term durability

Best 6.5″ Convertible Coaxial/Component Speaker

JL Audio C3-650

JL Audio C3-650 Review

Sometimes you want a coaxial speaker, sometimes you want a component. Either way, you want a durable, great sounding speaker. The JL Audio C3-650 is considered a convertible speaker because the center mounted tweeter can be removed and mounted component-style with a phase plug or fitted as a built-in tweeter coaxial-style.

We really like this choice for a speaker for two reasons. One, the C3 lineup is an excellent choice for a well-performing speaker. We wouldn’t consider it a competitive stereo choice but it performs very well. And two, the versatility of the speaker design that’s a direct result of JL’s R&D. JL Audio is very well known for their R&D in the audio world and this is yet another example of it.

Woofer Construction

Even though the removable tweeter is the star of the show, it’s the high-quality mica-injected polypropylene woofer cone that does the most work. A butyl rubber surround keeps the cone stable. Butyl rubber is always a good sight to see in a surround – it’s a tried and true product that typically is only featured on a higher quality speaker. JL Audio also engineered a glass-filled polymer frame that uses cooling channels to increase the voice coil responsiveness and prevent unwanted vibrations, resonance, and distortion.

Dynamic Motor Analysis

JL Audio speakers undergo a process that the company has developed over their decades of experience to perfect the way a speaker sounds in a car while in motion. By applying DMA to these speakers, what you hear is a better representation of certain frequencies. Properly tuned, you’ll get cleaner, tighter, more punchy bass from these 6.5-inch speakers in a vehicle setting.

Tweeters for Days

The C3-650’s tweeters are some of the best you’ll find. They are crisp, clear, and full without being tinny or harsh. They feature a ferrofluid cooling mechanism that enables these little guys to remain clear and stable even at high volumes. The one-inch silk dome ensures smooth and rich frequencies that don’t overpower the interior of a vehicle.

The tweeter assembly simply twists into the phase plug region of the woofer when mounted as a coaxial. When removed, JL Audio supplies a phase plug that fills the space and ensures that your woofer produces a broad soundstage.

Included Crossovers

To get the most out of the convertible design, JL Audio engineered these speakers to work with a separate crossover network. We think this is a good thing even though you don’t see it on too many coaxial speakers. The crossovers ensure that high-frequency sounds go to the tweeters while the woofer gets the midrange and bass. A crossover network makes a substantial improvement in the way a coaxial system sounds.

Power Handling Capabilities

JL Audio rates these for an RMS of 75 watts continuous power handling. They recommend an amplifier ranging from 25 watts up to 150 watts per channel to get the most out of the speakers. The speakers can produce frequencies between 48 and 25,000 Hz, well within the ranges of the average ear. In some applications, these speakers take a little tuning to get everything set correctly, but the results are worth it.

Key Features
MakeJL Audio
Size6.5″ Component/Coaxial
Power (RMS)75 watts
Power (Peak)225 watts
Frequency Response48 – 25,000 Hz
Sensitivity90 dB
Reasons to Buy
  • Makes going from coaxial to component easy and simple
  • Can purchase matching speakers for front door component setups and rear door coaxials
  • Incredible bass and midrange with quality tweeter
Reasons Not to Buy
  • Should really be amplified with proper power
  • Not well-suited for open air installations

Best 6 1/2 Inch Speaker for Volume

Alpine R2-S65

Alpine R2-S65 Review

It’s been a long time coming, but high-res audio is finally having its moment in the car audio world. After decades of being relegated to expensive home theaters and recording studios, brands like Alpine are betting that buyers want to take advantage of the modern capabilities available. To get the most out of your music, you need a great-sounding speaker, and that is exactly what the next generation of Alpine R-series speakers brings.

CFRP Woofer Cone and Tweeter Diaphragm

It starts with the proprietary woofer cone design. Flex and weight are the two enemies of a speaker cone, which is why we emphasize it so much in our reviews here. Alpine uses carbon fiber intermeshed with a polymer reinforcement for the composition of the cone. The fibers are aligned with the curvature of the cone to produce an ultra-strong, incredibly lightweight surface that structurally minimizes distortion and unwanted harmonics that come along with a flexing, heavy cone. The new tweeter design uses a magnesium dome that sets off the highs perfectly against the aggressive mid-bass frequencies generated by the woofer.

H.A.M.R. Surround

A strong and light cone is only useful when the speaker incorporates a surround design that can take advantage of the performance. Many manufacturers have introduced proprietary designs and technology to improve the surrounds. In this case, Alpine uses its patented design that stands for High-Amplitude Multi-Roll. This surround design allows for lots of movement without putting stress on the cone to shift or distort. This helps to prevent frequency and volume loss at higher power levels.

Frame, Basket, and Magnet

The overall design of the RS-65 coaxials is intended to allow the speaker to fit in tight locations. The lightweight aluminum frame and basket fully surround the spider and magnet, making these an excellent choice to mount without the use of a box or baffle. A neodymium magnet gives the speaker a shorter profile too without a loss in performance, while the design of the grill reduces the overall height of the speaker (if you decide to use it).

Power and Performance

Alpine says these speakers will handle 100 watts RMS and can take a peak input up to 300 watts. If you are picking these speakers, you are looking for loud and full frequencies. These speakers focus most of their attention in the lower-mid and bass range, while the tweeter nicely fills in the high frequencies.

The speakers are rated to handle frequencies between 35 Hz and 40,000 Hz. You’ll want to use an aftermarket amp that puts out at least 45 watts per channel and don’t be bashful about going higher than that. These speakers like power.

Key Features
Size6.5″ Coaxial
Power (RMS)100 watts
Power (Peak)300 watts
Frequency Response65 – 40,000 Hz
Sensitivity88 dB
Reasons to Buy
  • Intense, deep mid-range frequency that outperforms many other designs
  • The newest generation of R-series speakers brings high-res playback to the car audio community
Reasons Not to Buy
  • Midrange frequencies can become muddy at high-volume levels
  • Not suitable for a factory replacement speaker without amplification

Best 6.5″ Coaxial Speaker for Factory Upgrades

Infinity PR6512is

Infinity PR6512is Review

We used to think that you couldn’t really get a good sounding 6.5-inch coaxial speaker without spending big money. Then, Infinity came along with the PR6512IS and blew our minds. We were concerned that these would just be some rebadged garbage, but that’s not at all what you get with this set of affordable coaxial speakers.

Apart from their stylish design and low pricepoint, we really love how universal these are. They’re one of the few speakers on this list that really don’t need to be amplified to get great volume and performance from them but will benefit from the extra power. They also are surprisingly great for handling bass. They’re our choice for upgrading your factory system with.

Plus One+ Woofer Design

Like higher-priced Infinity speakers, Infinity extends their proprietary Plus One+ technology to their PR6512is. This design pushes the woofer cone to the very edge of the basket, effectively increasing the surface area of the cone by nearly 25%. That directly translates to deeper coverage, fuller sounding bass without the need to overpower the speaker. The woofer cone is a polypropylene design that uses a rubber surround.

Edge-Driven Tweeter

The tweeter in these speakers rivals those costing hundreds more. The use of an edge-driven motor allows the tweeter to produce smooth, consistent high frequencies without getting harsh. A textile dome adds to the softening characteristics that allows the tweeters to sound so good.

True 4-ohm Speakers

Most four-ohm speakers measure that resistance at the speaker, meaning you’ll have higher resistance overall which reduces the amount of power available to your speakers. These speakers measure at 2.7 ohms to allow for a true four-ohm overall resistance once you factor in speaker wire. Again, this design makes the Infinity PR65 an excellent factory upgrade for a system while also making for a good choice in amplified aftermarket systems.

Power and Performance

Infinity provides a rated power handling of 55 watts with a peak of 165 watts. A moderate amplifier will make these speakers sound the best, but many aftermarket car stereos and factory head units will provide enough power for them to still sound good. They operate in a frequency range of 53 Hz up to 20,000 Hz. This range means you won’t get super high frequencies typical of music containing string instruments and horns. Bass performance is excellent, even with a small amplifier.

Key Features
Size6.5″ Coaxial
Power (RMS)55 watts
Power (Peak)165 watts
Frequency Response53 – 20,000 Hz
Sensitivity88 dB
Reasons to Buy
  • Totally affordable way to get the unique Infinity sound and look with performance to back it up
  • Ideal for a factory upgrade or where long runs of wire are needed, like in a limo
Reasons Not to Buy
  • Lacks high frequency range that others have
  • Not necessarily a ‘high performance’ speaker

Best 6 1/2″ Coaxial Speaker for Bass

Rockford Fosgate Power T1675

Rockford Fosgate T1675 Quick Review

Next on our list is the Rockford Fosgate Power T1675. These speakers have been on our list for nearly three years now, outlasting many others that normally cycle through or have new versions released. Probably because there's really not much to upgrade!

An oversized 6.5″ (still fits 6.5″ openings) pair of coaxial car speakers, these speakers are very well priced for their level of performance. They put out a peak 140 watts per speaker, have a 4 ohm impedance and great sensitivity at 88 dB. Since they're an oversized speaker, their cone is a bit larger, giving it more surface area to power the low frequencies. Designed as a high powered OEM speaker replacement, these Rockfords are also a great factory option. Whether you have an OEM, aftermarket head unit, or even if you have a high-powered amplifier – the T1675 is another great option and worth your consideration.

Size6.5″ Coaxial
Power (RMS)55 watts
Power (Peak)165 watts
Frequency Response53 – 20,000 Hz
Sensitivity88 dB
Reasons to Buy
  • Superb lows and highs
  • Great sound quality and performance for the price
Reasons Not to Buy
  • Works best in conjunction with an amplifier
  • Crossovers are huge

Best 6 1/2 Inch Coaxial Speaker Under $100

Polk Audio DB652

Polk Audio DB652 Quick Review

Undoubtedly a stylish pair of speakers, the popular Polk Audio DB652 also packs a punch with 300 watts peak power handling per speaker. With a good frequency range, sensitivity of 92 dB, and incredible price in the $70-80s, the DB652 gets the CarAudioNow Best Value award.

Prior to the DB652, we favored their predecessor DB651. The newer DB652 only improves on their prior winner on our list. They feature polymer/mica composite woofers with durable rubber surroundings that are built to withstand heat and moisture without falling apart. The tweeter is a liquid-cooled 3/4″ silk/polymer dome with Neodymium magnets for crisp and clear high frequency sound reproduction. The tweeters even pivot, allowing you to aim them wherever you'd like. And like most of Polk's speakers, the DB652s are water resistant and marine rated, so if you're looking for a great speaker to put into your boat, these are the speakers for you.

MakePolk Audio
Size6.5″ Coaxial
Power (RMS)100 watts
Power (Peak)300 watts
Frequency Response40 – 22,000 Hz
Sensitivity92 dB
Reasons to Buy
  • Great for use in marine environments (water resistant)
  • Excellent power handling
  • Stylish grills
Reasons Not to Buy
  • Highs can be harsh

Other Articles We Think You Should Review About Car Speakers Protection Status      © 2024