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Polk Audio DXi521 5-1/4" 2-way car speakers

Item # 107DXI521

Go ahead, circle the parking lot till your favorite song is over.

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Go ahead, circle the parking lot till your favorite song is over.

4 questions - 5 answers

Item # 107DXI521

About the Polk Audio DXi521

John Pollard

Enjoy your music even more

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.
Polk Audio DXi 521

Enjoy your music even more

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 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.

Aluminum dome tweeters broadcast detailed sound

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.

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Product highlights:

  • 5-1/4" 2-way cars speakers (pair)
  • polymer composite woofer with butyl rubber surround
  • 3/4" aluminum dome tweeter
  • 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
  • MFR # AA7521-A

What's in the box:

  • Two 2-way speakers
  • 2 Grilles
  • Eight 1" Self-tapping screws
  • Eight 3/8" Self-tapping screws
  • 8 Speed clips
  • Owner's Manual (English/ Spanish/ French/ German/ Italian/ Portuguese)
  • Online product registration information

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Customer reviews for Polk Audio DXi521

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Average review:

4.5 out of 5 stars
34 reviews

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More details on the Polk Audio DXi521

Pat M.

Features & specs

General
Speaker Size
Design 2-way
Tweeter Design 3/4" Dome
Impedance (Ohms) 4
Tweeter Composition Aluminum
Woofer Composition Bi-Laminate Composite
Woofer Surround Rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Specifications
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
Top-mount Depth (Inches) 2 5/16
Bottom-mount Depth (Inches) N/A
Cutout Diameter or Length (inches) 4 11/16
Mounting Height (Inches) 0.627
Frame Width 5.174
Frame Length 5.174
The Polk Audio DXi521 replaces these items:

Product Research

Features

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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Customer Q&A

4 questions already asked

Q
I recently replaced the factory dash and soundbar speakers in an 04 Wrangler Rubicon with these(4 speakers, not including factory sub). What would be a good pairing head unit you would recommend for this that can stream audio via Bluetooth?
raymond  Mar 12, 2017
1 answer
A
Thanks for your question. For information on selecting the best receiver I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the receiver models and help you make the best choice for your system.
kenneth  Mar 13, 2017 (Staff)
Q
Can these speakers be used in marine applications?
rick  Jan 18, 2016
1 answer
A
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.
kenneth  Jan 18, 2016 (Staff)
Q
are these r type speakers ?
reaper  Aug 01, 2015
1 answer
A
Not sure what you mean by r type
larue  Aug 02, 2015
Q
are these speakers bi ampable?
mr  May 27, 2014
2 answers
A
I'm sure they could be modded to be biampable, but out of the box, no.
tom  May 28, 2014
A
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

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