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Polk Audio DXi400

4" 2-way speakers

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Does it fit my car?

Item# 107DXI400 offer details

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Polk Audio

Our take on the Polk Audio DXi400

by Jo Greene

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 DXi400 speakers feature 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.

See more info on this item

Highlights:

  • 4" 2-way car speakers (pair)
  • polymer/mica composite woofer with butyl rubber surround
  • 3/4" 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: 85-22,000 Hz
  • sensitivity: 91 dB
  • top-mount depth: 1-7/8"
  • warranty: 1 year
  • Our 60-day money-back guarantee
 

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and specs chart | What’s in the box? | In-depth notes

Features and Specs

Features and Specs
General
Design
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 2-way
Tweeter Design
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 0.75" Dome
Tweeter Composition
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 Silk
Woofer Composition
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 Polymer/Mica Composite
Woofer Surround
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 Rubber
Parts Warranty
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 1 Year
Labor Warranty
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 1 Year
Specifications
Sensitivity
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 91 dB at 1 watt
Frequency Response
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 85 - 22k Hz
RMS Power Range (Watts)
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 2-45
Peak Power Handling (Watts)
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 135
Impedance (Ohms)
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 4
Top-mount Depth (Inches)
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 1 3/4
Bottom-mount Depth (Inches)
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 2
Cutout Diameter or Length (inches)
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 3 11/16

Product Research

Product Research
What's in the box?

Download owner's manual

  • Two 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

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 open the box, verify contents, 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.

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 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 400 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 400 speaker features a 3/4" silk dome tweeter for clear, accurate highs. The tweeters use a light-weight neodymium magnet for higher efficiency.

 

Product Reviews

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Reviews for the Polk Audio DXi400

Average Customer Review:

45 people say:

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Showing: 1-20 of 45
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5 out of 5

Polk Audio DXi400

Written By Bob, Greenvile, NC on Monday, June 17, 2013
Installed in a 2007 Mazda 3
Crutchfield Customer Review (What's this?)
 
Great little speaker! I added these to the boat which I already had a pair of DXi525's. Not quite the bass as the 525 but rich clean sound. Easy install with 3 3/4" hole saw.
Was this review helpful?    Yes | No
 
5 out of 5

Polk Audio DXi400 speakers

Written By kennyD, Fort Walton Beach FL on Saturday, June 15, 2013
Crutchfield Customer Review (What's this?)
 
Installed in the rear doors of my 2001 Nissan Frontier Crew Cab.Good quality. Sounds much better than the factory speakers.
Pros:
easy to install, good price.
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

Polk Audio DXi400

Written By Anonymous, georgia on Friday, June 14, 2013
Installed in a 1986 Mazda B Series
Crutchfield Customer Review (What's this?)
 
Incredible sound for 4" speakers
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5 out of 5

polk audio dxi400

Written By S. Silver, Tomball, Texas on Friday, June 14, 2013
Installed in a 2012 KIA Forte Koup
Crutchfield Customer Review (What's this?)
 
I just received these Polk Audio speakers and installed them in my 1985 Kawasaki Voyager 1300 motorcycle today to go with a new JVC head unit I also installed. These replaced the OEM 4" speakers that originally came with the bike. These are very high quality, easy to install and most importantly sound awesome! There is no comparision between these and craptastic OEM basic speakers. They even fit (albeit tight) in the original Kawasaki speaker mounting covers so the look of the bike is unchanged. Even without an amp the sound is crisp, loud and they really will make for a better ride! Shipping was free and extremely fast!
Pros:
Excellent quality, great price, easy install, awesome sound and free shipping! All the best in one package!
Cons:
Had to purchase smaller female wire connectors at a local store in order to install but it was not a big deal. The old OEM speakers had larger male connection tabs than these new ones but it's all good!
Was this review helpful?    Yes | No
 
5 out of 5

Polk audio speakers

Written By Seth d., Lacey Washington on Thursday, June 13, 2013
Installed in a 1983 Honda Accord
Crutchfield Customer Review (What's this?)
 
This is my second pair of speakers I have bought from Crutchfield that were Polk audio and they rock just as good as the last pair. I would and will continue to buy Polk audio for all of my vehicles due to the quality and reasonable price!
Pros:
Price Quality of sound Easy to install
Cons:
Not a whole lot to complain about honestly
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5 out of 5

FOR YOUR INFORMATION

Written By CJSPEAKMAN, OCCIDENTAL, CA on Wednesday, June 12, 2013
Installed in a 1995 Toyota Corolla
Crutchfield Customer Review (What's this?)
 
Excellent happy with purchase, nice up-grade from stock unit, would recommend to a friend.
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5 out of 5

Polk DXi 400

Written By Gregg, Sarasota, FL on Sunday, June 02, 2013
Crutchfield Customer Review (What's this?)
 
Great sound for a "small" speaker. Can turn up the volume and the sound stays crisp.
Pros:
Great sound, great price.
Cons:
None
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5 out of 5

Perfect for my soft top TJ

Written By KevinW, San Diego on Thursday, May 30, 2013
Installed in a 2004 Jeep Wrangler
Crutchfield Customer Review (What's this?)
 
Arrived quickly and installed with ease. The sound and clarity are far superior to the originals (which had over 100k miles on them). Highly recommend.
Pros:
Sound clarity and quality. Ease of installation.
Cons:
none
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4 out of 5

Polk Audio DXi400

Written By jporiginal, Atlanta GA on Monday, May 27, 2013
Installed in a 2003 Jeep Wrangler
Crutchfield Customer Review (What's this?)
 
I installed these speakers in my Jeep Wrangler to replace the stockies in the dash. Speakers are very crisp and give a really detailed sound quality. I mixed these with a pair of the DXi525 5.25" components in the overhead sound bar. They match great. After I got everything dialed in with the head unit, there's no obvious difference between the two. Just a focused auidio image. I'm not sure how they handle low end on their own, as I have a 8" Bazooka tube for all the low end. But, when I crank everything up there's no distortion and loud enough even with the top and doors off.
Pros:
Easy factory replacement with included/added adaptor plates and wiring harnesses. Clarity. Economic value.
Cons:
Mounting these speakers to the plate was a little curious. I used the included screws and metal clips. It was a little tricky getting the screws to tighten up but it managed to all tighten up well.
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5 out of 5

Awesome speakers

Written By Darrell, Charlotte, NC on Friday, May 24, 2013
Crutchfield Customer Review (What's this?)
 
I had purchased a pair of speakers years ago and when I deciced to upgrade with an amp and sub I looked at new in-dash speakers. These speakers fit well and were very easy to install. The best part the sound is incredible. The music in my truck has never sound so good.
Pros:
Everything
Cons:
None so far.
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5 out of 5

Polk Audio DXi400 speakers

Written By Boneyard, Wadsworth, OH on Wednesday, May 22, 2013
Installed in a 2004 Chevrolet Aveo
Crutchfield Customer Review (What's this?)
 
Very nice detail from these speakers....
Pros:
Very nice quality
Cons:
None
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5 out of 5

Dynamic sound

Written By Schrek, Greensboro, NC on Monday, May 20, 2013
Crutchfield Customer Review (What's this?)
 
The sound quality and range of these speakers is much better than I expected from their 4" size. The mid-range bass really impresses me. They also work great in combination with the JVC KD-AHD69 head unit, with no amplifier. The quality of the material seems to be really good, and the screen covers look like they'll stand up well.
Pros:
Sound quality Easily driven Quality materials
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5 out of 5

Good value

Written By MrWombat, Seattle, WA on Monday, May 20, 2013
Installed in a 1982 Datsun 720
Crutchfield Customer Review (What's this?)
 
no complaints, works as advertised
Pros:
good value for the price paid
Cons:
be warned that the tweeter does stick out a bit from flush, so it could be an issue trying to fit them behind existing grills.
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4 out of 5

Polk Audio DXi400

Written By Engobo, San Diego, CA on Saturday, May 18, 2013
Installed in a 1996 Toyota Corolla
Crutchfield Customer Review (What's this?)
 
For the price, great upgrade, definitely a marked difference from the factory units.
Pros:
Easy to install, compact sizing and easy fit
Cons:
Unknown to me ..
Was this review helpful?    Yes | No
 
5 out of 5

Very happy with these

Written By H2O_Doc, Alexandria,VA on Wednesday, May 15, 2013
Installed in a 2012 Nissan 370Z
Crutchfield Customer Review (What's this?)
 
Excellent sound quality. Added nice fill to a system that had a low frequency bias. For the price paid, I can't think of a better value.
Pros:
Value Good sound quality Freq range for their size
Cons:
None.
1 out of 1 people found this helpful
Was this review helpful?    Yes | No
 
5 out of 5

Great Purchase

Written By JBC, Lexington, KY on Tuesday, May 14, 2013
Installed in a 1997 AMG Hummer
Crutchfield Customer Review (What's this?)
 
I needed 2 sets of good sounding speakers for my truck and did not want to break the banks and that's what I got with the 2 pair of DXi400's I received. Crutchfield sales made the recommendation and it was great!!
Pros:
Good quality, great price!!
1 out of 1 people found this helpful
Was this review helpful?    Yes | No
 
5 out of 5

Great sound from such a small package

Written By A.J.F, United States on Tuesday, May 14, 2013
Installed in a 1968 Chevrolet Camaro
Crutchfield Customer Review (What's this?)
 
Great sound especially when connected to an external amp. Highs are beautiful at low and high volumes.
Pros:
Includes speaker grills
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Polk Audio DXi400

Written By Anonymous, Normandy, TN on Sunday, May 12, 2013
Installed in a 1989 Chevrolet C Series
Crutchfield Customer Review (What's this?)
 
Speakers fit and sound good. The speakers do hit the factory speaker covers but they do still snap into place.
Pros:
Good speaker for the price
1 out of 1 people found this helpful
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5 out of 5

good speakers

Written By geneb, Guam on Friday, May 10, 2013
Crutchfield Customer Review (What's this?)
 
replacement for old car speakers, sounds really clear and full, would recommend it
Pros:
5
Cons:
non
1 out of 1 people found this helpful
Was this review helpful?    Yes | No
 
5 out of 5

Polk Audio DXi400

Written By t3ragtop, Columbus OH on Thursday, April 25, 2013
Installed in a 2008 Chevrolet Aveo5
Crutchfield Customer Review (What's this?)
 
These 4" speakers are really very musical and, although they run out of breath in the mid-bass range, they really shine in the upper register. Highs aren't brittle and the mid-range to high frequency transition is very smooth. Sibilance is very well controlled and there is no noticeable smearing of the sound stage with the coaxial speaker design. For the price, these are super performers.
Pros:
Easy installation with 4x6 inch adapter plates and wiring adapters included by Crutchfield at no additional expense. Nicely packed with sedately styled grilles. Materials and construction are very good. The magnet structures and frames are nicely done.
Cons:
In a small car with no room for larger speakers, I had to use what would fit. It's no fault of the speakers, but they are short on output in the mid-bass range and really don't produce any useable output below 100 to 125 hz.
1 out of 1 people found this helpful
Was this review helpful?    Yes | No
 
1-20 of 45 >>

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Rated 5-stars by consumers

For a more in-depth review and enhanced detailed information on the Polk Audio DXi400, please visit the Crutchfield website product page (/S-FjV0nA9U2XP/p_107DXI400/Polk-Audio-DXi400.html ).

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    Polk Audio DXi400

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    Polk Audio DXi400

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    Polk Audio DXi400