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Loudest 6.5 Car Speakers Reviews

We all want car speakers that go boom, and deliver some serious audio performance when it comes to thumping bass and volume output. We also want speakers that deliver sparkling highs and hyper-accurate midrange you need to feel like you’re sitting front row at the orchestra.

However, finding the loudest car speakers is where things get murky. There hundreds of speakers on the market and there are various technical specifications that you have to sort through before making a decision. And when you have that many car speakers, there’s an awful lot of rubbish you need to wade through to find what you’re looking for.

Luckily for you, we’ve sacrificed our hearing for you and we’ve narrowed down the choices to 10 loudest 6.5 car speakers on the market that offer true quality for more than reasonable price.

These great 6.5 speakers feature some of the most powerful audio drivers ever designed and engineered, pumping out tonnes of quality audio juice at extraordinary volumes with minimal distortion and with exceptional clarity.

So, without further any ado, onto the reviews…

5 Loudest 6.5 Component Speakers Reviews

1. Infinity Kappa 60.11CS

Infinity Kappa 60.11CS

  • 6-1/2 inch Plus One+ glass-fiber woofer cones
  • Hi-roll rubber surround
  • 3/4 inch edge-driven soft dome tweeters
  • Starfish™ mounting brackets for easier tweeter installation in factory locations
  • 2-way external crossover network
  • Tweeter adjustment circuits (0, +3 dB)

Last update on 2021-06-08 / Affiliate links / Images from Amazon Product Advertising API

Size 6-1/2″ & 6-3/4″
Design Component
Frequency range 45-35,000 Hz
Power Handling 
  • RMS:  90 Watts
  • Peak: 270 Watts
Sensitivity 93 dB
Top-mount Depth 2-1/8″
Impedance 3 ohms

Infinity Systems is an American manufacturer of loudspeakers founded in 1968. They’re one of the best car audio brands under the umbrella of Harman International – a US-based high-end audio company – since 1983.

Infinity has flourished and grew even stronger in the loudspeaker industry. Nowadays, Infinity Systems is one of the most popular brands that’s trusted for for their technological innovations in reference-quality audio reproduction, and much of that technology is ingrained in their car speakers.

Infinity makes some of the best car speakers. The 60.11CS speakers are some of the loudest 6.5 speakers in the Infinity KAPPA series. These speakers were designed to take the sound in your car to a whole new dimension. Once installed, they’ll bring out every nuance and detail in your favorite music tracks, making time spent in your car seem more like a concert than a commute.

Infinity 60.11cs speakers are featured with edge-driven 3/4″ soft dome tweeters which allow for natural-sounding high frequencies. The “edge-driven” design results in a larger tweeter with improved power handling and wide high-frequency dispersion. That said, you’ll hear a more clearly defined soundstage where you can picture the placement of every instrument.

By using the included hardware, you can either surface- or flush-mount these tweeters. Additionally, you can use the Starfish brackets for easier tweeter installation in factory tweeter openings.

As for bass, these speakers are equipped with Kappa glass fiber woofers which hold their shape when the power is cranked up, so you still get punchy and defined bass. Glass fiber is light and responsive, so you don’t need that much power to drive these woofers. For consistent bass output, these woofers are bonded to hi-roll rubber surround

These 6.5 component speakers are rated for 90dB sensitivity rating, which makes them make them sensitive enough that you can power them with an aftermarket stereo, but for optimal results, consider feeding them plenty of power from an outboard amp — up to 90 watts RMS.

2. JBL GTO609C

Size 6-1/2″
Design Component
Frequency range 53-21,000 Hz
Power Handling 
  • RMS:  90 Watts
  • Peak: 270 Watts
Sensitivity 93 dB
Top-mount Depth 2-1/16″
Impedance 3 ohms

Hands down, JBL is an iconic brand in the loudspeaker market. They’re one of the biggest and most successful speaker manufacturing company in the world. They’ve been around for a very long time and have mastered the art of making great sounding speakers.

JBL GTO609C speakers are impressive – all things considered. These speakers are very well-put-together. We’d recommend them for basically anybody who is looking for quality speakers that are able to produce strong, clear sound from a head-unit or amplifier capable of delivering up to 90 watts of power RMS.

JBL designed their GTO5609C 6-1/2″ component speaker system as a hi-fi solution for those who to want to feel their music. These speakers are featured with plus One polypropylene Woofer Cones which provide more overall speaker-cone area than other cones in its class — The result is greater bass output, increased efficiency and greater musical character.

Although the range doesn’t go quite as low as other speakers in this price range, these babies can put out some pretty decent bass.

As for highs, JBL GTO609C speakers use edge-driven soft dome tweeters that are engineered to yield amazing levels of detail without sounding harsh. You can use the adjustable level control to tweak these tweeters to your liking, so the speakers’ sound is customized to your car.

These tweeters can be mounted in several different ways. They can be surface- or flush-mounted with JBL’s I-Mount system which provides even greater installation flexibility so you can easily achieve the ultimate in-vehicle sound experience.

These speakers feature a vented magnet with a high thermal-capable voice coil which effectively dissipates heat away from internal parts, ensuring long lasting performance.

JBL GTO609C speakers will sound great running off your aftermarket receiver as they’re quite sensitive — they’re rated for 93dB sensitivity rating — But if you want to blast these babies, they’ll handle up to 90 watts RMS from an external amp.

That said, if you’re in the market for the loudest 6.5 speakers, you’ve just found a serious contender.

3. Alpine SPR-60C

Alpine SPR-60C

  • Multi-layer hybrid fiber woofer cones
  • Santoprene® rubber surround
  • 1 inch silk dome tweeters
  • External crossovers — 12 dB/octave (high -pass) and 6 dB/octave (low-pass) crossover points
  • 7-level tweeter adjustment

Last update on 2021-06-08 / Affiliate links / Images from Amazon Product Advertising API

Size 6-1/2″
Design Component
Frequency range 65-29,000 Hz
Power Handling 
  • RMS: 110 Watts
  • Peak: 330 Watts
Sensitivity 88 dB
Top-mount Depth 2-3/8″
Impedance 3 ohms

We’ve already gushed about Alpine and their impeccable car speakers. The Alpine SPR-60C couples great built quality with powerful sound dynamics. This pair of speakers is nothing short of amazing. They’re designed by Hi-Fi experts, and are made to perform.

Like it loud? The Alpine- SPR-60C sits in Alpine’s wheelhouse of “loudest” 6.5 speakers. Alpine designed their Type-R speakers for those of you who like to turn it up. They’ll work great with your car stereo, but they really come into their own, delivering big, dynamic sound with plenty of bass when you power them with an external amplifier.

These Type-R SPR-60C component speakers features 6-1/2″ multi-layer hybrid fiber woofers designed to produce really strong bass response. Alpine has adapted the specially ridged surround, originally developed for their subwoofers, to these speakers, so you get consistent, extended cone movement that pushes a lot of air.

As for tweeters, these speakers come with silk tweeters that produce pristine highs that bring out your music’s detail and depth with no shrillness. Then for the audiophiles who like to tweak the way they listen to music, Alpine mounts an EQ ring in front of the tweeters to improve the tweeter’s dispersion characteristics, providing excellent off-axis response, so you can hear your favorite track as you like.

For seamless, clear sound, these speakers come with external 2-way crossover networks which sends the right frequencies to right driver – the lows to the woofers, the highs to the tweeters, and the mids to the midrange driver. These crossovers are 60% smaller than the old Type-R crossovers which makes them quite easier to install.

Alpine SPR-60C speakers boast a sensitivity rating of 88 dB, a solid frequency range of 65hz – 29khz, and can handle up 110 watts RMS.

4. Polk Audio DB6501

Size 6-1/2″
Design Component
Frequency range 35-23,000 Hz
Power Handling 
  • RMS: 100 Watts
  • Peak: 300 Watts
Sensitivity 92 dB
Top-mount Depth 1-11/16″
Impedance 4 ohms

Polk Audio checks the other 6.5 car speaker brands with its robust sound. Here is a pair of speakers that pulls no punches when it comes to pumping out big sounds. The Polk Audio is building on its stellar line of dB premium car speakers. And When you name a series of speakers after the unit of sound measurement, (dB for decibels), you’re telling your customers one simple fact – turn them up, they’re set to rock!

The DB6501 are rated for 100 watts RMS. Combine that with their sensitivity rating of 92 dB and you get speakers that will make a night and day difference.

Polk Audio DB6501 component speaker system features a 6-1/2″ polypropylene woofer cones bonded to strong rubber surround for solid playback and long lasting performance. Speaking of longevity, these speakers are marine certified. They’re featured with non-corrosive ABS wheel-design grilles, polypropylene UV tolerant cones, waterproof inner and outer surrounds, as well as stainless steel mounting hardware.

Additionally, and to ensure that these speakers can withstand harsh outdoor conditions, they’ve been tested for salt-fog, UV and humidity. They also have an IP55 rating which means that they’re dirt- & water- resistant.

Polk Audio DB6501 speakers come with 3/4″ silk dome tweeters designed to deliver smooth highs with precision for more clearly defined soundstage. Their external crossover network keeps the highs and lows flowing to the proper drivers for seamless performance.

5. Kicker 43CSS654

Kicker 43CSS654

  • 6-1/2 inch polypropylene woofers
  • Polyester foam surrounds
  • 3/4 inch titanium dome tweeters
  • External crossover network with 3 tweeter levels (0, +3, +6 dB)

Last update on 2021-05-22 / Affiliate links / Images from Amazon Product Advertising API

Size 6-1/2″
Design Component
Frequency range 35-21,000 Hz
Power Handling 
  • RMS: 100 Watts
  • Peak: 300 Watts
Sensitivity 90 dB
Top-mount Depth 1-11/16″
Impedance 4 ohms

We couldn’t leave a list of the loudest 6.5 speakers without a set of Kickers! Kicker is a pretty big name in the car audio industry. They offer some great sounding car speakers for reasonable price tags.

Kicker 43CSS654 are among the loudest 6.5 car speakers that Kicker has to offer. They can handle up to 100 watts RMS. Combine that with their high sensitivity rating of 90 dB and you get loud car speakers that really live up to the Kicker slogan “living loud”.

Generally speaking, component speakers are designed to handle a lot more power than their counterpart full-range speakers, and these Kicker speakers are no exception. That said, bear in mind to hook them up to an external amplifier for optimal sound performance. That’s not to say that these speakers will sound bad running off of your receiver. Quite honestly they’ll sound pretty good as they’re very sensitive, but bear in mind that no car receiver out there – be it a factory-installed one or aftermarket one – can put out 50 watts RMS, let alone 100 watts.

Kicker 43CSS654 component speakers are designed to elevate your music to a startling level, revealing more detail than your ever heard from your factory speakers. They’re featured with 6-1/2″ polypropylene woofers that delivers solid low end, backed by a polyester foam surround for long lasting performance.

These speakers are featured with separate 3/4″ 3/4″ titanium dome tweeters that will bring new dimension to the high-frequency range with pristine highs that sparkle with clarity.

5 Loudest 6.5 Coaxial Speakers Reviews

If you’re on a budget and looking for reasonably-priced speakers to replace your factory-installed ones, no muss no fuss, then coaxial speakers are for you.

Coaxial speakers, are often referred to as “full-range speakers” because they are designed to reproduce a larger range of audio frequencies from a single unit. These speakers are not much different from component speakers as they both comprise of the same drivers, however, in coaxial speakers, the drivers are combined to save on money and space.

The most common configuration for coaxial speakers is a woofer with a tweeter mounted on top of it (2-way), but there are also 3-way coaxial speakers that contain a woofer, mid-range, and tweeter.

So, without any further ado, here are some of the loudest 6.5 coaxial speakers…

1. JBL GTO629

Size 6-1/2″
Design Coaxial
Frequency range 53-21,000 Hz
Power Handling 
  • RMS:  60 Watts
  • Peak: 180 Watts
Sensitivity 93 dB
Top-mount Depth 2″
Impedance 3 ohms

If you’re looking for something that can bump out extra power hassle-free, the JBL GTO629 might be the speakers to look at.

JBL is a serious contender within the audio space. They offer a wide range of car speakers of different types. The GTO629 speakers are among the loudest 6.5 coaxial speakers that JBL have to offer.

These speakers are designed to be a high-grade replacement to stock speakers. They’re fitted with carbon-injected Plus One™ woofer cones bonded to butyl rubber surround for long lasting performance.

These speakers use JBL’s unique Plus One woofer cone design, which expands the diaphragm area of the cone to give you better low-frequency response.

To complement their low frequency response, these speakers come with edge-driven soft dome tweeters to ensure crisp and sharp upper frequencies. Thanks to the UniPivot™ design, you can swivel, pivot and aim these tweeters to your ears, even when the speakers are mounted down low in the doors for better stereo imaging. You can also adjust the tweeter output level; choose between 0 (flat) and +3 dB to compensate for off-axis mounting positions or road noise.

Performance wise, JBL GTO629 boast a 93 dB sensitivity rating and can handle up to 60 watts RMS. They’ll sound relatively good when paired to your headunit, but they’ll truly shine when driven by an external amplifier.

The downside, however, is that these speakers are a slightly lacking in terms of bass output. So, you might want to consider adding a subwoofer to your audio system especially if you’re a basshead who’s often listening to heavy bass tracks.

2. Rockford Fosgate P1650

Rockford Fosgate P1650

  • Injection-molded mineral-filled polypropylene woofers
  • Santoprene rubber surround
  • 3/4 inch treated PEI dome tweeters
  • Vertical Attach Surround Technique (VAST™) increases cone area
  • 1 inch high-temperature voice coil
  • Rubber magnet boot cover

Last update on 2021-05-22 / Affiliate links / Images from Amazon Product Advertising API

Size 6-1/2″
Design Coaxial
Frequency range 45-20,000 Hz
Power Handling 
  • RMS: 55 Watts
  • Peak:110 Watts
Sensitivity 88 dB
Top-mount Depth 2-5/16″
Impedance 3 ohms

When it comes to car audio components, Rockford Fosgate is probably one of the most legendary. We are completely enamored with the brand’s legendary craftsmanship, masterpieces and intense attention to details. It isn’t a surprise that this brand’s became one of the most respected names in the car audio industry.

One of their loudest 6.5 door speakers is the P1650. These speakers are excellently designed and manufactured to perfection, which makes them a high-grade replacement to stock speakers.

Using an injection-molded mineral-filled polypropylene cone supported by Santoprene rubber surround, the Rockford Fosgate P1650’s woofers deliver satisfactory bass response. But no matter how heavy the bass gets, the P1650’s 3/4″ PEI dome tweeters provide clear, extended highs for a well balanced sound output throughout the audible sound spectrum.

The next best thing about these speakers besides their smooth sound output, is the Flex 2 Fit basket design which uses slots on the outer edge of the speaker basket for wider installation coverage, making these speakers compatible with most cars out there.

Power handling wise, Rockford Fosgate P1650 sport a sensitivity rating of 88 dB and can handle up to 55 watts of power on continuous basis (RMS).

All in all, Rockford Fosgate P1650 are great sounding 6.5 car speakers for the buck.

3. Rockford Fosgate T1650

Sale
Rockford Fosgate T1650

  • Injection molded carbon fiber and polypropylene woofers
  • Santoprene rubber surround
  • 1 inch aluminum dome tweeters
  • Integrated concealed 12dB/octave crossovers
  • Vertical Attach Surround Technique (VAST™) increases cone area

Last update on 2021-05-22 / Affiliate links / Images from Amazon Product Advertising API

Size 6-1/2″
Design Coaxial
Frequency range 44-22,000 Hz
Power Handling 
  • RMS: 75 Watts
  • Peak:150 Watts
Sensitivity 88 dB
Top-mount Depth 2-9/16″
Impedance 4 ohms

Rockford Fosgate car speakers fall into three major series. There’s the “Prime”, “Punch”, and “Power”. The speakers in the Prime series are Rockford Fosgate’s entry-level speakers, while the speakers in the Punch series are more of a middle-of-the-road line of speakers. They represent the perfect mix of power and price. Power series speakers on the other hand are considered the company’s high-end speaker lineup.

That said, If you’re looking for something that can bump out extra power, Rockford Fosgate has plenty of other choices available. One of the more popular options available is the T1650.

Rockford Fosgate “Power” T1650 speakers are built from the ground up to make a night and day difference in terms of sound quality. These 2-way coaxial speakers are fitted with lightweight polypropylene cones bonded to Santoprene rubber surround for improved power handling, long lasting performance, and more controlled bass. Further, these cones are reinforced with strong carbon fibers so they are able to keep their shape even when the speakers are pushed to the limit.

To make the highs sparkle, these speakers use 1″ aluminum dome tweeters mounted on an offset suspension system, minimizing any acoustic reflections from back of the tweeters and maximizing accuracy.

Similarly to the Rockford Fosgate P1650 speakers (linked to above), these speakers feature FlexFit 2 frame with multiple slots instead of single screw sized holes for wide compatibility with most vehicles.

Rockford Fosgate T1650 speakers sport a sensitivity rating of 88dB and can handle up to 75 watts RMS.

4. Kicker DSC650

Sale
Kicker DSC650

  • 6-1/2 inch polypropylene woofers
  • Ribbed polyester foam surrounds
  • 1/2 inch PEI domed tweeters

Last update on 2021-05-22 / Affiliate links / Images from Amazon Product Advertising API

Size 6-1/2″
Design Coaxial
Frequency range 40-20,000 Hz
Power Handling 
  • RMS:  60 Watts
  • Peak: 240 Watts
Sensitivity 90 dB
Top-mount Depth 1-13/16″
Impedance 4 ohms

If you need something that sounds a little louder and fuller than your worn-out factory speakers, but that’s more affordable than the speakers we listed above, the Kicker DSC650 finds a nice middle ground.

The Kicker DSC650 is an excellent pair of speakers for folks looking for a budget-friendly pair of speakers that can get the job done without costing an arm and a leg. And for the money, the Kicker DSC650 speakers are a definite no-brainer. I means, for less than $60, you get well-built speakers that sound good, easy to install, and tops your stock speakers up in a pinch. Yes, there are better sounding car speakers but you’ll have to shell out much more money.

The speakers at hand are fitted with a stamped steel framework supporting a ribbed, UV-treated foam surround and rigid 6-1/2″ polypropylene cones with EVC™ (Extended Voice Coil) technology, so you can get the kind of clarity you’ve never had with your factory speakers.

Speaking of clarity, these Kicker speakers come with zero protrusion 1/2″ PEI domed tweeters which ensure you get crisp, and well-detailed highs without interfering with factory grilles for seamless mounting.

These speakers boast a 90dB sensitivity rating and can handle up to 60 watts RMS.

5. Kenwood KFC-1653MRW

Kenwood KFC-1653MRW

  • Injection-molded polypropylene cones
  • Rubber surround
  • 1 inch balanced-dome tweeters built into grilles
  • UV-resistant fixed grille design

Last update on 2021-05-22 / Affiliate links / Images from Amazon Product Advertising API

Size 6-1/2″
Design Coaxial (Marine)
Frequency range 60-20,000 Hz
Power Handling 
  • RMS:  50 Watts
  • Peak: 150 Watts
Sensitivity 86 dB
Top-mount Depth 2-9/16″
Impedance 4 ohms

Boats and music have always been inseparable. We all know that nothing enhances a great day of boating quite like great music to listen to while cruising, relaxing, fishing, or having drinks with friends. But what if your boat speakers aren’t loud enough to cut through the engine noise, the water, the wind and the open air?

In that case, you need to consider upgrading your speakers. However, the sheer number of marine certified speakers out there is enough to make your mind spin.

Kenwood KFC-1653MRW speakers are some of the loudest 6.5 marine speakers in the market. These speakers are designed from the ground up with outdoor conditions in mind.

Component wise, these 2-way speakers are featured with water-resistant injection-molded polypropylene woofers and 1″ balanced-dome tweeters.

These speakers can handle up to 50 watts RMS (150 peak). They’ll sound great whether you’re out on the water or relaxing at the marina. However, their sensitivity rating (86dB) is below average.

Designed to withstand harsh marine conditions, Kenwood KFC-1653MRW speakers will shrug off the harmful effects of water, salt, and sun, Additionally, thanks to their white UV-resistant grilles, composite speaker baskets, and stainless steel hardware, these speakers will last for many years to come.

Why Should You Consider Component Speakers

Component car speakers are the way to go if you’re looking for sound quality and volume. These speakers comprise of woofers, tweeters, and crossovers — all of which are mounted separately from each other, but are designed to work seamlessly with one another. This makes them the choice of serious audiophiles.

The audible human hearing range is from 20 Hz to 20 kHz, and that spectrum is generally broken up into a few different categories when it comes to loudspeaker technology. Each driver on a set of component speakers is meant to handle a single portion of that range — the lows by the woofers, the highs by the tweeters, and and mid-range speakers fit in between those extremes. This approach reduces interference and improves audio clarity over full-range speakers.

Component car speakers provide better sound quality than coaxial setups. However, these systems are a bit more expensive and can be difficult to install. They may even require the car interior to be modified to make room for the drivers and wires.

Coaxial Vs. Component Speakers – Which is better?

Deciding between component and coaxial speakers isn’t an easy task as there are so many things to take into account.

In a nutshell, component speakers offer superior sound quality, more volume and better imaging, but they cost a bit more and aren’t that easy to install. Full range speakers on the other hand are way less expensive and installing them is a piece of cake.

Speaker TypeProsCons
Coaxial or Full-Range Speakers - Less expensive
- Direct fit
- Built-in crossovers
- Low sound quality
-
Component Speakers- Superb sound quality
- Greater customisation opportunity
- Cost a bit more
- Difficult to install

Alex Brown

Hey There, my name is Alex Brown, I'm an LA-based sound engineer with over 10 years experience installing, troubleshooting, and repairing commercial, automotive, and household sound equipment. I've installed highly competitive car audio systems, and everything from navigation systems to full car stereo systems, remote starters, alarms and beyond. I enjoy creating solutions and simplifying everyday needs. I also love helping people get great sounding gear, thereby, saving the world from bad sound one customer at a time.

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