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Polk Audio DXi525

5-1/4" 2-way car speakers

88 Reviews | 3 questions - 10 answers

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Our take on the Polk Audio DXi525

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.

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.

Precision woofers showcase your music
The DXi525 speakers feature 5-1/4" polymer/mica 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.

Silk/polymer dome tweeters broadcast sweet sound
Rest assured, you'll hear every detail of your most enthralling musical moments. Each 3/4" silk/polymer dome tweeter brings out the high-frequency highlights in your music, and a proprietary magnetic liquid cools each tweeter so you'll get clear sound and excellent long-term performance. From an intensely quiet acoustic pluck to the most exhilarating electric solo, it'll be a very entertaining ride.

Speakers have built in tweeters that protrude out from the speaker which is no good but the speakers sound fine for the money. Overall a good value.

Seabass, Jacksonville, FL

What's in the Box:

  • Two 5-1/4" Two-way speakers
  • 2 Grilles
  • Eight 1" Self-tapping screws
  • 8 Speed clips
  • Owner's Manual (English/ Spanish/ French/ German/ Italian/ Portuguese)
  • Online registration information

Product Highlights:

  • 5-1/4" 2-way cars speakers (pair)
  • polymer/mica composite woofer with butyl rubber surround
  • 3/4" pivoting liquid-cooled silk/polymer composite dome tweeter
  • Neodymium tweeter magnet
  • built-in 2-way crossover network
  • power range: 2-45 watts RMS (135 watts peak power)
  • frequency response: 60-22,000 Hz
  • sensitivity: 93 dB
  • top-mount depth: 2-5/16"
  • warranty: 1 year
  • Our 60-day money-back guarantee

Polk Audio DXi525 Reviews

Average Customer Review(s):

(88 Reviews)
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Hands-on research

Features and Specs

Speaker Size 5 1/4
Design 2-way
Tweeter Design 0.75" Dome
Tweeter Composition Silk
Woofer Composition Polymer/Mica composite
Woofer Surround Rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Sensitivity (1W at 1 meter) 93
Sensitivity at 2.83 volts N/A
Frequency Response 60 - 22k Hz
Minimum RMS Wattage 2
Maximum RMS Wattage 45
Peak Power Handling (Watts) 135
Impedance (Ohms) 4
Top-mount Depth (Inches) 2 5/16
Bottom-mount Depth (Inches) N/A
Cutout Diameter or Length (inches) 4 11/16

Product Research


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 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 Polk DXi 525 speaker features a Dynamic Balance, polymer/mica composite cone woofer. These composite cones feature tremendous stiffness-to mass ratio. Lower mass means faster transients and finer detail.

Rubber Surrounds: For a smoother response and improved durability, the speaker uses rubber surrounds.

Silk Dome Tweeters: Each Polk DXi 525 speaker features a 3/4" silk dome tweeter for clear, accurate highs. They can be angled slightly within the housing to compensate for off axis mounting. The tweeters also employ a light-weight neodymium magnet for higher efficiency.

Mounting: The Polk Audio DXi 525 speakers fit in a standard 5-1/4" opening (typically 4.3" to 4.8" cutout) with four mounting holes.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

3 questions already asked

If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the install. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer. You can also post your question in our forums: Or try our online support center: [ Krissy  Feb 21, 2014 ]  Staff
These speakers will work well with anything you plan to use. I have used Polk for many years and i am very happy with the results and have been like i said for years. I currently have them in my doors as well, and have 4.5's in the dash and some kenwoods(6X9) in the back. Great set of speakers, highly recommended. [ CRUZ  Feb 14, 2014 ]
I think they'll be fine, need an amp to really make these polk's come alive [ RYAN R  Feb 14, 2014 ]
I'm not sure of the Kenwoods, you'd probably want to compare specs and see if they are close. I have my Polk's mounted in front doors and a pair of Infinity Ref 6032si speakers in the rear seat panels. These two pairs complement each other well. I would just compare the actual specs of the two sets and if they are close they should work ok together. [ Donald  Feb 13, 2014 ]
It works for me just fine at my age....52. [ KENNETH R  Feb 13, 2014 ]
all I can say is they sound fantastic great choic [ WILFREDO  Feb 13, 2014 ]
They work together VERY well. Have a set paired w/ Kenwoods and another paired w/ Infinity. Both blend great! Excellent spkrs! [ GREGG  Feb 13, 2014 ]
Hello Kevin, I have been in the car audio installation side business since 1995 and I have purchased a lot of items from Crutchfield actually over $8,000.00 worth. It would depend on what grade of Kenwood speakers you have, but between Kenwood and Polk I personally would go with Polk and I have purchased and installed the speakers you are asking about in a 95 Jeep Cherokee Sport which is connected to a Kenwood cd/usb receiver and they sound great. Also I have an amp and a sub for the low frequencies in the 95 Jeep Cherokee. I hope this helps, M. Fletcher [ MELVIN G  Feb 13, 2014 ]
Thanks for the quick response. [ Frank  Dec 12, 2013 ]
Here is the info we show on the bolt pattern: Number of holes: 4 Perimeter 1: 3.7" Perimeter 2: 4.1" Diagonal 1: 5.3" Diagonal 2: 5.6" [ Jeff  Dec 12, 2013 ]  Staff