The 7 Best 6.5-Inch Speakers to Buy in 2018

Upgrade your car or boat's sound system with these top-notch speakers

Regardless of your music preference, car speakers play an important role in our daily commutes, on our road trips and even if we're lucky enough to be out on the water on a boat. And upgrading your sound system is not just one of the easiest ways you can breathe new life into your vehicle or watercraft, but it’s also one of the most satisfying. However, finding the right pair of speakers can be challenging since there are so many options to choose from and things to take into consideration such as budget, design, size, compatibility with your car or boat, and most obviously, sound quality. But since you've already narrowed down the size speaker you're looking for (6.5 inches), we can help with deciphering the other important features. Read on to see the best 6.5-inch speakers to trick out your ride with, so you can hit the road or open water and enjoy listening to your favorite tunes even more.

Best Overall: Polk Audio DB651

If you want the perfect combination of high-quality sound and power, take a look at the Polk Audio DB651 6.5-inch speakers. There are 6.5-inch woofers inside each speaker and the polymer/mica composite that makes up the speaker protects against heat or moisture and, with maritime certifications, they can handle nearly all types of weather (in case you accidentally leave the window open during a rainstorm) or coffee spills.

The addition of liquid-cooled 3/4-inch swivel-mounted tweeters helps to deliver a strong and detailed sound. Polk’s added use of laser imaging inside each DB651 speaker results in a technology that adds a smooth frequency response without distortion at higher volumes. Featuring stainless steel mounting hardware and sleek looking ABS grills, the Polk speakers look as good as they sound. 

Most Durable: Polk Audio MM1 (MM652)

Combining good power handling, marine-grade durability and excellent audio output, the Polk Audio MM652 is one of the best speakers on the market. With a continuous power of 100 watts and peak power up to 300 watts, the MM652 can achieve higher volumes without distortion against competitive speakers. Polk’s dynamic balance helps the MM652 produce a rich and clean sound, and a one-inch terylene tweeter allows for crisp highs and mids. As a marine-certified speaker, the MM652 adds waterproof inner and outer surrounds, epoxy-coated crossovers and weep holes for proper drainage. The merger of these waterproof traits ensures that the MM652 can work not only in cars, but also on boats as well and, with the higher volume, they remain easy to hear on both land and sea.

Best Compact: Infinity Kappa 62.11I

When it comes to car speakers with high-caliber sound and sharp looks, the Infinity Kappa 62.11I 6.5-inch speakers are the best compact choice for upgrading your car’s speaker system. Constructed out of a carbon injected glass fiber cone material, the Kappa was designed to exceed your expectations and last for years. Upgrading your car speakers to the Kappa all but ensures that your audio experience will vastly exceed the factory-installed speakers, thanks to its two-ohm nominal impedance and superior sound quality. With 450 watts of peak power per speaker pair and one-inch soft dome edge-driven fabric tweeter construction, the Infinity Kappa adds booming bass and a good midrange sound. Without visible mounting screws, the Kappa closely matches most modern car interiors and adds chrome inserts for an extra visual lift.

Best Sound: JL Audio C2-650X

Made for maximum versatility, the JL Audio C2-650X 6.5-inch, two-way car speaker sound is in a class above the rest. Whether your musical taste is Beethoven or classic rock, JL’s dedication to producing the finest car speakers is evident with the C2-650X. With a rugged construction, the C2’s 3/4-inch silk dome tweeter pairs with a mineral-filled polypropylene woofer for a musical output that can quickly drown out the rest of the world. The C2 has no issue handling high volume levels with almost no distortion for both musical notes and voice tracks, thanks to digitally optimized built-in crossovers. With crisp highs and punchy mids, the C2-650X helps set a new standard for sound in car speakers.

Best Splurge: Alpine SPR-60C

If you’re on the hunt for highs that sound incredible, the Alpine SPR-60C 6.5-inch component speaker lives up to company's positive speaker reputation and then some. Each mechanism of the speaker is built right into the speaker's head with the one-inch tweeter placed in the middle of a midrange cone. With 110 watts of power available for each speaker or a peak power of 330 watts, the Alpine’s audio output will blow your socks off. The Alpine will perform best when paired with a separate woofer for deeper bass, but on its own the SPR-60C showcases a dazzling frequency response. Their compact size allow for easy installation and the neodymium magnets are ​smaller than regular ones but deliver vastly superior sound quality.

Best Budget: Rockford Fosgate R165X3

If you want to find the right balance between a big upgrade over your car's factory speakers while keeping the price down, the Rockford Fosgate R165X3 speakers are worth a hard look. Packing silk dome Piezo 3/4-inch tweeters, polypropylene cones and woofers all into one package, the R165X3 excels at extracting maximum power from the hardware. Rated at 45 watts with a peak power of 90 watts, the R165X3 punches out crisp highs and mids and, with easy installation, it fits in nearly any size car available today. The excellent tweeter crossovers work well with any type of music and limit distortion as volume increases to the highest levels. A steel frame built around the speaker helps protect it from hard hits and a rubber lining protects the speaker itself from damage. Separately available speaker grills add extra protection but can be removed for maximum audio output.

Best Value: Rockford Fosgate P1650

Versatile and delivering heavy volume with a wallet-friendly price tag, the Rockford Fosgate P1650 6.5-inch speakers run circles around factory-installed speaker systems. The bass response from the P1650 is exceptional for a speaker this size. At the same time, the 3/4-inch PEI dome tweeter enables crisp highs that sound punchy even as the crossover filters reduce unwanted frequencies for better sound. The inclusion of Rockford’s vertical attach surround technique (VAST) enables the P1650 to be placed anywhere in the speaker grill as the sound will fill up to 25 percent more surface area than competitive speakers. Installation is simple even for novices: DIY types should have the P6150 ready to go under 10 minutes. 

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