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Polk Audio DXi521
5-1/4" 2-way car speakers
Item #: 107DXI521
Your price: $74.99 pair Earn up to 75 Rewards points
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Watch a first-look video
Item #: 107DXI521
Your price: $74.99 pair Earn up to 75 Rewards points
Go ahead, circle the parking lot till your favorite song is over. Polk Audio's DXi Series speakers will make you want to hit "repeat" so you can hear it all over again. Polk uses a high-tech approach and ideal materials to give your tunes an exciting new edge.
The DXi521 speakers feature 5-1/4" polymer composite cones that are lightweight and stiff, so they can create a big sound with minimal distortion. Polk analyzes their drivers in motion to ensure that cone movement is even and precise. Polk also uses laser imaging to craft woofer cones that are perfectly balanced to resist distortion-causing resonances.
Each 3/4" aluminum dome tweeter brings out the high-frequency highlights in your music, so you'll hear every detail of your most enthralling musical moments. From an intensely quiet acoustic pluck to the most exhilarating electric solo, it'll be a very entertaining ride.
The speakers that originally came in your car were made from inexpensive materials, designed to create acceptable sound at the lowest possible cost to the manufacturer. If you love music, you deserve better. Name-brand aftermarket speakers deliver fuller, richer sound with considerably more detail and nuance, and they're capable of playing louder and cleaner than factory speakers. Connect new speakers to your factory radio and you'll get the best possible sound from your dealer-equipped system. Pair them up with a new car stereo for a level of enjoyment that can rival a high-fidelity home audio experience.
Speakers sound great and easy install.
Pros: Easy to install
fit perfect in my 2005 Jeep Wrangler.
Needed to freshen up the speakers.
Pros: Great speaker, nice sound. Good fit. Used speaker baffles with it.
Cons: Have nothing bad to say.
Great sounding speakers. Installed in front doors with Polk 6x9's in rear. You need some power from an amp and a good deck with equalizer to really make them come alive. Bass is a little stingy without equalization and amps. True sound does come out with the right deck and power.
Pros: Clear sounding, Very stout speakers. clear crisp highs and midrange.
Cons: Need amp and equalization to drive these.
Worked great in my wifes Jeep Wrangler. Easy to install.
Used these Polks to replace the rear door speakers in my Trailblazer SS. Easy to install with provided instructions, although by completely removing the speaker mounting panels underneath the door panels, you can trim the mounting much more cleanly with a sabre saw, rather than trying to break off the tabs (that interfere with installation) with pliers while still in the truck. The speakers are much less efficient than the stock factory Bose speakers, by about 30 percent, which is significant. They also have a much leaner bass and midrange response, but much cleaner highs.
Pros: Cleaner, more brilliant highs.
Cons: Much less efficient than the factory Bose speakers, less bass and midrange, so overall volume for the system is reduced.
Good sound. Matched them with existing Polk 6x9 in the rear deck They dropped right in to the existing OEM slots. I ent with tweeter in one unit. Did not replace the OEM tweeter in the Buick 6 speaker setup. Sound great.
Pros: Great Sound, easy install
Love the sound. Very easy to install and fits perfectly with my motorcycle.
Pros: Did not have to splice any wires and come with a how to video if I needed it.
Speakers sound crisp and clear at low and high volumes
Pros: Affordable, big improvement over factory speakers, easy to install instructions
Cons: Nothing to do with the product, but be patient trying to install speakers above your head in a Jeep sound bar.
Overall this speaker was an improvement to the sound quality from the factory model but at 14 years old anything would have been. After being installed for one week I would say that I'm not 100% satisfied and question my purchase. I noticed the price drop over the last 6 months with these speakers and should have taken that as a warning sign.
Pros: Improvement to the clarity. Crutchfield as always is great to work with and provides everything you need to make it work. Price
Cons: Can not use the covers it comes with. Any type of bass seems washed out and dull.
All four 5.25"s swapped right into my 98 TJ, two dash and two soundbar. Crutchfield sent the appropriate wiring harnesses and 4x6 - 5.25" adapter for the dash; while nothing was needed for the soundbar, they sent two extra harnesses plus all hardware.
Pros: Everything needed, plus some Competitive price Marine grade
Cons: Polk grills didn't work out, but I don't like advertising anyway Top and doors are always off so I won't fully appreciate the sound
I bought these to replace the blown front speakers in my '98 Buick Riviera and am quite happy with them. The materials and build quality felt very nice putting them in and they fit nice and flush under my factory grilles. They get nice and loud and remain clear even with my factory stereo. The bass response is OK, much better than other brands in this price range I have used, but I didn't expect them to be show-stoppers at this price. Great for highway cruising volume. I'll probably replace the rears with the matching 6"x9"s and I'm sure an aftermarket stereo would give them some nice punch. Great performance for a little money.
Pros: Price, build quality, clarity
These speakers sound muddy and dull. I installed an Alpine KTP-445U Head Unit Power Pack and it didn't help much. These are simply poor sounding speakers with virtually no bass response. Highs don't sound much better.
Cons: Dull sound even with an amplifier.
These were recommended as a replacement for the factory speakers in my Kawasaki Vulcan Vaquero. The clarity has improved a lot, next will be installing an Alpine 445 amp so they can truly reach their potential. Thanks Crutchfield
Pros: Good clarity....Marine grade....awesome price
These speakers fit my 2002 caravan great. There is a small clearance problem with the rear panel speakers which are just over the cup holders for the rear most bench. The center horn of the speaker is pressing against the plastic body panel, but we'll let time tell if that's a problem or not. The sound is great and installation was relatively simple.
Pros: Sound quality, ease of installation
Cons: Size - But that's only due to the vehicle I'm installing them on
Sounds great for my needs
Pros: Sounds great
Cons: Grills did not fit my soundbar on Jeep Wrangler. Had to use old ones.
I'm very happy with the sound and ease of installation. The Crutchfield team was very helpful in my decision process.
Pros: They sound better than the old speakers.
Cons: I had to install said speakers myself, what a drag.
I used these in the dash of my 2005 Jeep Wrangler. I had to find a special bracket to upgrade to this size (standard is 4" or 4x6). They sound great compared to stock. It powered by a Kenwood Excelon KDC-X797 CD Receiver. The upgrade in size is much better and gives better bass and treble response.
Pros: Good value. Good sound.
These speakers compliment the Polk DXi 651 speakers I installed earlier< I am very happy with the Polk Audio products, I am certain that they will serve me very well for years to come.
Pros: Compliments my other Polk Audio speakers with quality sound at a very competitive price.
Nice little set of speakers. Well built with solid grills. I installed them in my boat with the Kenwood KMR-355U receiver unit, and am enjoying the upgrade.
Just purchased a 2012 Jeep Wrangler without the upgraded sound system. The stock speakers were lousy. I upgraded the speakers in the sound bar first. A week later I had to upgrade the speakers in the dash. I left the stock head unit. I put the Polk's in the front panels. Speakers sound great. No more muddy bass. The install took awhile, but that is because it is a Jeep. Sounds good with the stock head unit. Big, big difference.
Pros: Sound great. Good overall sound.
Cons: Difficult install in a 2012 Jeep Wrangler. Not the speakers fault. -- Jeeps fault.
|Tweeter Design||3/4" Dome|
|Woofer Composition||Bi-Laminate Composite|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
93 dB at 1 watt
|Frequency Response||60 - 22k Hz|
|RMS Power Range (Watts)||2-45|
|Peak Power Handling (Watts)||135|
|Top-mount Depth (Inches)||2 5/16|
|Bottom-mount Depth (Inches)||N/A|
|Cutout Diameter or Length (inches)||4 11/16|
High Efficiency Design: The Polk Audio DXi Series speakers feature a high efficiency design; meaning better sound and more volume using less power.
Dynamic Balance Driver Technology: Dynamic Balance is a proprietary Polk Audio technology using laser imaging to determine what combination of speaker materials create the least amount of resonance. Eliminating resonance in speakers results in a wide, smooth response and low distortion.
Klippel Optimized Components: For a driver to reproduce complex sounds accurately, the cone must move exactly the same distance and manner in both directions. The Klippel distortion analyzer, a device that uses a laser and sophisticated software to do large-scale analysis of drivers in motion, lets Polk optimize the speaker's motor structure, voice coil alignment, and suspension to yield the best possible performance.
Composite Cones: Each speaker features a Dynamic Balance, Bi-Laminate composite, polypropylene cone woofer. These composite cones feature tremendous stiffness-to mass ratio, resulting in faster transients and finer detail.
Rubber Surrounds: For a smoother response and improved durability, the speaker uses rubber surrounds.
Aluminum Dome Tweeters: Each speaker features a 3/4" aluminum dome tweeter for clear, accurate highs. Once the speakers are mounted, the tweeters can be tilted (approximately 25°) for optimum imaging.
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Recently, we gathered members of the Crutchfield car A/V writing team into our Crutchfield Labs car listening room for some critical listening of four of our most popular car speaker families. We...
They can be, but not recommended. The marine grade speakers have different coatings on them to help with corrosion resistance and UV exposure. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat. Hope that helps. [ Kenny Jan 18, 2016 ] Staff
Not sure what you mean by r type [ LARUE Aug 02, 2015 ]
I'm sure they could be modded to be biampable, but out of the box, no. [ TOM May 28, 2014 ]
They only have one positive and negative connection on the back for the whole speaker... There isn't a separate connection for the tweeter. Not sure if that helps or not. [ Brian May 28, 2014 ]