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Polk Audio DXi521 (DXi 521) db521 inspired Car/Marine/ATV Speakers

5-1/4" DXi Series 2-way Car Speakers, Marine Certified for Boats/ATV/Motorcycles - Same Performance as DB521

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• 135 Watts Max Each, 45 Watts RMS Each
• 3/4" (19mm) aluminum dome tweeter
• Dynamic Balance polypropylene cone
• 4 Ohm Impedance
• Sensitivity: 93dB
• Mounting Depth: 2 5/16"

Learn more about the dxi521

We apologize

This item has been discontinued

Product Highlights


• 135 Watts Max Each, 45 Watts RMS Each
• 3/4" (19mm) aluminum dome tweeter
• Dynamic Balance polypropylene cone
• 4 Ohm Impedance
• Sensitivity: 93dB
• Mounting Depth: 2 5/16"

Description


Polk Audio brand icon

Authorized dealer

Polk Audio DXi521: Clean and Precise Sound


Polk Audio DXi521 Car Speaker


Klippel Motor Optimization:

The DXi521 is made with laser measurement technology via the Klippel Motor Optimization for a smooth excursion path at any volume. This creates a more efficient and long lasting speaker that performs great at low or high volumes. This model is equivalent to the popular db521.





Polk Audio DXi521 Car Speaker


Proprietary Dynamic Balance Technology:

Polk's engineers are able to design out driver and system resonances that cause distortion with the Dynamic Balance technology. The composite cones also feature a stiffness-to-mass ratio that allows the speakers to react to faster transients with finer detail. You not only get clarity, but function and precision.






What does Marine Certified mean?

The DXi Series speakers go through the ASTM (American Society for Testing and Materials) marine testing to become marine certified. The speakers go through two harsh tests: the B117-03 Standard Practice for Operating Salt Spray (Fog) Apparatus and the D4329-99 Standard Practice for Fluorescent UV Exposure of Plastics. The Salt Fog tests exposes the components 95° Fahrenheit and 5% salt solution for 500 hours and the UV test puts the speakers through 8 hours of UV-B light, black body temperature of 60 degrees Celsius and 4 hours condensate water, black body temperature of 40 degrees Celsius. These tests ensure these speakers will last in the harshest of marine environments.





General Features:

  • 5-1/4" DXi Series 2-way Coaxial Car Speakers
  • Power Handling:
    • Peak: 270 watts per pair / 135 watts each
    • RMS: 90 watts per pair / 45 watts each
  • Recommended Power Range: 2 - 45 watts RMS per channel
  • Dynamic Balance polypropylene cone
  • Butyl Rubber surround
  • 3/4" (19mm) aluminum dome tweeter
  • Top-mount Depth: 2 5/16"
  • Cutout Dimensions: 4 3/4"
  • 4 ohm impedance
  • Frequency Response: 60Hz-22kHz
  • Sensitivity: 93dB
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty
  • Priced Per Pair

Check out the DXi521 Owner's Manual



Specifications & Details


Speaker Specifications
Series
Polk DXi Series
Priced Per
Pair
Speaker Size
5-1/4"
Design
2-way Coaxial
Tweeter Design
Dome
Tweeter Size
3/4"
Tweeter Composition
Aluminum
Woofer Composition
Dynamic Balanced polypropylene
Woofer Surround
Butyl Rubber
Peak Power Handling
135 watts
RMS Power Handling
45 watts
Sensitivity
93 dB
Frequency Response
60 - 22000 Hz
Impedance (Per Voice Coil)
4 ohms
Top-Mount Depth (Mounting Depth)
2 5/16"
Cutout Dimensions
4 3/4"
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

DXi521

Weight:

4.50lbs

Internal SKU:

dxi521

Internal Product ID:

112445

Product and How-to Videos


Customer Ratings & Reviews



5 star
82%
4 star
0%
3 star
9%
2 star
9%
1 star
0%



Durability
4.6
Value
4.7
Features
4.3
Design
4.7
Usability
4.6

Customer Reviews

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clean and crisp

sound is clean, clear and crisp. for the price im shocked at how good they sound

By jason on June 30, 2016

2

found this helpful.

Great!

Very solid product for the price. Would recommend to anyone.

By Ryan on July 19, 2017

1

found this helpful.

Good Speakers

Good sounding speakers that are easy to install. They also look much better than the speakers replaced.

By Gregory on May 11, 2017

1

found this helpful.

ok for rear fill

I bought these because the ones we bought for our Mazda 6 sounded great (they were 6.5)... this pair paled in comparison. They sound ok as rear fill when singled out but that's it I wouldn't rely on them for much more than that. Given their size and rating I expected more butt should have known better. Either way hard to beat for the price. Would I buy them again probably not. Next time I'll buy a set of 6" mid basses and make them work.

By Ben on May 7, 2017 Checkmark Icon Verified purchase

1

found this helpful.

Awesome speakers!!

The sound, price, and quality are great! Everyone should have a front and rear set to put in there car to hear the difference!

By Jason on February 3, 2018

Great package everything I needed

The panels were a drag but the speakers snapped right in no problem the kit of wires was great sounds real good can't wait for my subwoofer box to show

By BD. on December 27, 2017 Checkmark Icon Verified purchase

Great speakers

Great sound and fit. I am pleased with my purchase of these.

By James on August 21, 2017

Great value

I bought many of the polk speakers over the year , best all around sound great up grade over a stock speaker , and work great with an amp. would and have bought over and over.

By gator on May 22, 2017

Good speakers

Good set of speakers, especially for the money. I installed them in a 2015 Indian Chieftain teplacing the stock speakers. There is no comparison now, these speakers made a vast improvement.

By Sean on April 15, 2017

Polk Audio DXi521

Trued Polk quality at a very affordable price. Sound surprisingly good.

By Wes on December 27, 2016 Checkmark Icon Verified purchase

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