Last updated on October 1st, 2020 at 10:07 pm
In this article: We'll review 7 of our best pick 6 1/2 inch coaxial speakers for your car, truck or vehicle.
- Best Overall Pick: JL Audio C5-650X
- Runner Up, Overall: Hertz HCX 165
- Best Sound Clarity: FOCAL K2 Power 165KRC
- Best Convertible Speaker: JL Audio C3-650
- Best Volume Pick: Alpine SPR-60
- Best for Bass: Rockford Fosgate Power T1675
- On aBudget Pick: Polk Audio DB652
Upgrading your car's factory speakers with a pair of the Best Coaxial Car Speakers will give new life to your daily driving. Coaxial speakers combine the woofer and the tweeter onto the same axis. Compared to component speakers, where the tweeter and the larger woofer are separate and need to be mounted separately. Coaxials are a combo package. This allows the projection of a full range of sound and frequencies from ‘one' speaker. They’re easier to install and easier to wire. You can even replace component speakers with coaxials if you’d like. This type of speaker is arguably the most popular speakers on the market.
There are a number of benefits to upgrading your vehicle's stereo with a set of aftermarket coaxial speakers. Car manufacturers don't focus on their speakers as much as they should. In most cases, the factory speakers that come with your car are cheaply made. They aren't built for audio performance either. Aftermarket speakers are made with better quality materials than OEM speakers. They have a longer lasting life, and in most cases will provide improved audio performance too. There's also a number of added benefits and features to aftermarket speakers, like weatherproof and water resistance. And one of the best parts about aftermarket speakers is that they're affordable. You'll find that in most cases, replacing your car's speakers with OEM units is more expensive than a higher quality aftermarket coaxial speaker. If you're not 100% positive your car will fit a 6 1/2″ speaker, check out our car speaker fitment guide to confirm the speaker sizes for your year, make and model.
Before you scroll down to our full list of 6 1/2 inch coaxials, make sure you know the difference between a coaxial and component car speaker:
Component Speakers are typically a pair of tweeters and mid-bass drivers (speakers) that are matched with a crossover that limits the frequency range each speaker reproduces. You can tell if your car has components if you have more than one speaker for each channel, or if the tweeter is separate from the mid-bass driver. Usually component sets are in the front of the vehicle.
Coaxial Speakers have the tweeter, mid-bass driver and the crossover mounted together in one space saving speaker. They are very popular because they are much easier to install and don’t take up as much space as the component set. Coaxial speakers are usually found in the rear of the vehicle.
If you still don’t know the difference between a coaxial and component speaker and would like to learn more, click here for more information. And for more information about installation, be sure to take a look at our how to install your car speakers article.
Unsure what speaker size your car has? Search for your make and model using our Speaker Fitment Guide to find out if the speakers on this list match the speaker size of your car!
Best 6 1/2 Inch Coaxial Car Speakers List
JL Audio C5-650X Quick Review
On the top of our list of The Best 6.5″ Coaxial Car Speakers is the JL Audio C5-650X. The C5-650X features long-excursion mineral-filled polypropylene woofers that have longer travel that push more air, as well as a cast alloy frame with a patented cooling design that increases its efficiency and power handling.
One of the great unique features that the C5-650X has is external crossovers. These give you 4 position tweeter level and 3 midrange level controls so you can tweak the sound to you preference.
- Great build quality
- Powerful sound
- Superb sound clarity and quality
- High price tag
Hertz HCX 165 Quick Review
You won't find a bad review about this pair of coaxial car speakers – the Hertz HCX 165. Built with an over-sized magnet, a damped mesh fibre cone and loss-less polymer rubber surround, the HCX 165 was designed to produce smooth, clear and loud music efficiently. They are manufactured with high quality materials with high standards. The combination results in one of the top speakers on the market today. It's an all around great product and an excellent choice for almost any application.
- Smooth and clear sound quality
- Higher power handling
- Quite affordable
- Large metal plate around the screw hole, making installation tricky in some cases
FOCAL K2 Power 165KRC Quick Review
The Focal K2 Power 165KRC has a power handling of 160 watts peak per speaker, a high sensitivity of 93 dB and great frequency range. It is undoubtedly one of the best quality and performing set of coaxial speakers on the market, meant to blow away it's competitors.
The 165KRC features woofers that are made from Aramid, foam and glass fibers that are designed to play all types of music with precision and power. These woofers are mounted in a zinc-aluminum alloy baskets that are non-magnetic, which eliminates all interference.
In addition to the innovative design and engineering, during assembly Focal meticulously tests every model to ensure that they meet Focal's standards. But, with a heavy price tag, it might dig deep into your wallet which is why it is number 3. But if you have the cash, the Focal K2's are truly one of the ultimate coaxial speakers.
- Crisp, clear sound quality
- Innovative design
- Great coaxial speakers
- A bit pricy
JL Audio C3-650 Quick Review
The JL Audio C3-650 loudspeaker is an impeccable coaxial speaker with plenty of bass, power, and control. It gives you the opportunity to mount the woofer and tweeter separately, filling the car with rich and crystal-clear sounds from your stereo. They call it a convertible component. But if you don’t want to mount the woofer and tweeter separately, you can just install the twitter inside the woofer and still receive optimal performance from like a coaxial speaker.
JL Audio did not disappoint with the construction and aesthetic looks of the C3-650. They used innovative construction techniques that not only enhance the speaker’s beauty but also improve its quality of music production. The unit uses a 6-1/2” mica-filled polypropylene woofer designed to ensure perfect delivery of the low and midrange frequencies. It has a glass-filled polymer frame with elevated frame cooling that prevents any interference to your music.
The tweeters are made with a silk soft dome that features Ferrofluid cooling and damping to prevent overheating when handling extremely high frequencies. They provide great musical clarity and if mounted separately, a phase plug is provided and installed in their place within the woofer. The system also features a 2-way external crossover that you can use to adjust your woofer’s and tweeter’s settings to match the speaker’s output to your tastes.
- Quality construction for durability
- Clear, rich and powerful sound quality
- Grills Included
- On the pricy side
Alpine SPR-60 Quick Review
The Alpine SPR-60 is one of the best coaxials on our list for those looking to replace their existing speakers and use with an aftermarket head unit. But, they're also an excellent choice for an amplified system and can handle power with ease so you can be confident in turning it up without hearing any distortion.
The SPR-60 features multi-layer hybrid fiber woofer cones for great bass response, silk tweeters for producing highs that bring out your music's high details and powerful neodymium magnets that are smaller and lighter but pack just as much punch. Type-R speakers have come fit the demographic for those who like to ‘crank it to the max', so if you fit the profile, the SPR-60C's are the speaker for you.
- Stylish, sleek design and easy to mount
- Great bass and extremely clear low’s
- Good power handling
- Decent volume output
- Mounting brackets are a bit fragile
Rockford Fosgate T1675 Quick Review
Next on our list is the Rockford Fosgate Power T1675. An oversized 6.5″ (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 a great upgrade to your car's stereo. 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.
- Superb lows and highs
- Great sound quality and performance for the price
- Works best in conjunction with an amplifier
- Crossovers are huge
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.
- Great for use in marine environments (water resistant)
- Excellent power handling
- Really easy to install
- Slightly harsh highs
How We Tested
In order to find the best 6.5″ coaxial speakers, CarAudioNow has combined several reviews across the industry with first-hand tests. There are many criteria that we take into consideration when rating and reviewing each speaker, including:
- Style (Looks, Design)
- Power Ratings (Peak, RMS)
- Quality (Materials used, manufacturer, etc)
- Online Reviews (From multiple vendors such as Sonic Electronix, Crutchfield, Amazon and more)
The result from our combination of sources and testing is a list of the top rated and reviewed 6.5″ coaxials. And in addition to our compilation of best rated products, CarAudioNow also provides multiple comparisons of prices from vendors to try to get you the best price for all of your products. But in the end, the best speaker is one that meets your specific needs and is compatible with your car.
Best 6.5″ Coaxial Speakers: Common Speaker Terms & Ratings
When comparing and choosing coaxial speakers on today's market, CarAudioNow takes into consideration several key criteria: Lets define a few common criteria and terms that are compared when rating a speaker:
Power Handling: Power handling is the measurement a manufacture gives to rate how much power a speaker can handle and operate at. It is given by two measurements, RMS and Peak (or MAX). RMS Power rating is the amount of power the speaker handles continuously, while the Peak Power rating is the amount of power a speaker can handle in short bursts. When comparing speakers, RMS Power is the more relevant and important rating to look at.
Sensitivity: The speaker sensitivity rating is a measurement of the amount of sound the speaker will emit from the power it’s given. The higher the sensitivity, the more efficient the speaker is with the power it’s given. For lower powered systems, you want a higher sensitivity rating. For a higher powered system, you want a lower sensitivity rating. Lower sensitivity rated speakers are meant to handle higher power.
Frequency Range: Frequency range is the frequencies that the speaker emits sound at, measure in Hz. Normally they are given from a low frequency to high, for example: 20 – 22,000 (22k) Hz. This measure how low and high the speaker can actually emit sound at.
Speaker Design and Materials
Woofer: The speaker woofer can determine the responsiveness, and quality of the speaker. The stiffer and more lightweight the material used, the more effective the speaker is. Polypropylene is a very common material used for the cone, as well as woven fabrics such as kevlar. Aluminum and titanium are also used in higher end speakers.
Woofer Surrounding: The woofer surround also is an important aspect of the speaker system and effect the sound as well. Durable, lightweight, and free moving materials are used to allow the woofer to move with as little energy possible. The material is essential for a long lasting and performing speaker too. As speakers get older and used, humidity levels and wear-and-tear can crack and even break the surrounding of the woofer. Rubber surrounding is typically the most long lasting an high performing material. Foam an cloth surroundings are found on less expensive component speakers, with lower performance and shorter life spans.
Crossovers: When you purchase a component car speaker system, a crossover is almost always a part of the package. External crossovers are typically used to lessen the amount of distortion a speaker might have by separating the frequency inputs. Signals can cross through coated wiring and cause distortion, so an external crossover system will limit this.
At the end of the day, remember that ultimately the best pair of 6 1/2 inch coaxial car speakers will meet the needs of your vehicle, your music preference, and your wallet. In some cases, the products on our list might not be the ideal setup for you so make sure you keep your personal preferences in mind when choosing your next set of speakers