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Polk Audio db401

4" 2-way car speakers

Item #: 107DB401

30 Reviews

This item is no longer available.

Original Price: $59.99 pair

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Good music becomes great when you hear it through Polk's db Series car speakers. Polk engineers use laser imaging to determine the ideal combination of speaker materials and design to eliminate distortion. The resulting technology produces speakers with smooth frequency response, sharp detail, and the ability to play music at high volumes without strain.

Polk's db401 speakers feature 4" woofers made from a polymer/mica composite and durable rubber surrounds that won't fall apart under stress from heat, moisture, or time. Liquid-cooled 3/4" silk/polymer dome tweeters use powerful Neodymium magnets to deliver precise high-frequency reproduction, enveloping you in bright musical detail. The built-in two-way crossovers keep the high and low frequencies flowing to the proper drivers for seamless, efficient audio.

These speakers feature stainless steel mounting hardware and db-design grilles that will add a stylish touch to your car's interior.

Priced per pair

Product Highlights:

  • 4" 2-way car speakers (pair)
  • Dynamic Balance polymer/mica composite woofer with butyl rubber surround
  • 3/4" liquid-cooled silk/polymer composite dome tweeter
  • Neodymium tweeter magnet
  • Kapton voice coil
  • built-in 2-way crossover network
  • db-design grilles
  • stainless steel mounting hardware
  • power range: 4-45 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

Polk Audio db401 Reviews

Average Customer Review:

30 reviews
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Excellent sound and value

Written By JohnT, Watertown NY on Sunday, September 02, 2012

Crutchfield Customer Review (What's this?)

Outstanding construction, fit and finish. Quality speakers that out perform their small size. I have the first set mounted in the fairing of my touring motorcycle and hooked to the stock stereo. As is to be expected there is not over whelming bass, they are 4" coaxial after all. However they present a very clear and balanced sound in an unfriendly environment for music. (Open air, wind and traffic noise.) They also fit MUCH better and sound MUCH better than the 4" Bazookas that they replaced.

Pros: Respectable bass, balanced sound, great fit and finish

Cons: None

Great little speakers

Written By Ed F., Hammonton,NJ on Sunday, August 05, 2012

Crutchfield Customer Review (What's this?)

Great speakers for my motorcycle fairing. Great sound. I replaced automobile type speakers with these weather resistant speakers. Easy installation, and now, I can hear my music as I ride.

water proof speakers

Written By Bob, South Texas on Wednesday, August 01, 2012

Crutchfield Customer Review (What's this?)

installed on a jet ski, ( read constantly WET) so far have 7 wet days and speakers sound fine. Still not sure about how long they will last, but so far, they get a 5 STAR RATING

love them

Written By Karl, Clifton, NJ on Wednesday, August 01, 2012

Crutchfield Customer Review (What's this?)

Installed them in my boat - the sound is great and the quality if the speaker is very solid

decent for price and size

Written By Old Mercedes, Utah on Saturday, June 23, 2012

Crutchfield Customer Review (What's this?)

Speakers are really clear but distort easy if bass settings are very high. Great if your using for a tweeter, unfortunately my care only had room for this size in the front. Otherwise a 5.25 would sound much better.

Pros: small and clear

Cons: don't turn up the bass

Polk Audio db401

Written By Anonymous, Huntington, CT on Sunday, June 03, 2012

Crutchfield Customer Review (What's this?)

Sound great and easy to install!

Polk Audio db401

Written By Ron N, Galax,Va on Sunday, October 02, 2011

Bought these to replace the busted Pyle speakers in the door. Never really got much sound from the front mounted 4 inch speakers, so the system was heavily biased towards the rear 6x9's and the trunk mounted sub. But these speakers really kick! Now I use a neutral setting front to back so I can hear these. A little pricey for 4" speakers, but definately worth every cent.

Awesome Speakers

Written By Jason, Rochester, NY on Saturday, September 17, 2011

Searched all around the web, and in stores locally in Rochester. A friend pointed out this website, which helped me in so many ways. I read the reviews on these exact speakers and was extremely impressed by what others were saying. I bought them, couldnt resist the price, and installed them in my 94 Saab 9000. They sound absolutely ridiculous. i dont have an amp set up in line with the Polks, but they dont even need an amp, their that good. These babies crank out an impressive amount of sound for 4" speakers, best i could find online. Along with my Rockford 6x9 and the two Rockford 10" subs, my car sounds rediculous. the clarity you get out of these speakers is incredible. I would refer all of my friends to this product for sure.

If you have to buy 4in speakers

Written By Wayne, Georgetown KY on Thursday, June 30, 2011

I have these in the dash of my Jeep on a 4 channel 60RMS amp and they get loud they are with 2, 5 1/4 DB polks and a 10in kicker and I can blow out your ear drums with the top down on my jeep. Just remember they are 4in Highs are great and clear mids are okay no lows at all.

if you HAVE to have 4 inch speakers Buy these!

Written By huntr, West Linn, Oregon on Wednesday, June 22, 2011

Crutchfield Customer Review (What's this?)

im running a 60 watt per channel amp to 4 of these anda 10 inch kicker cvr 10 inch sub in my 98 suzuki sidekick and my system sounds much bigger than it is. could not be happier, thank you Advisor Ann for steering me to this fine Polk Product!!!

WOW under $100

Written By KatieM, Colorado Springs, CO on Tuesday, June 21, 2011

Crutchfield Customer Review (What's this?)

Installed in the dash of my 2005 Jeep Wrangler Unlimited. I can't believe how much I can hear with the top off (and doing 70-ish mph). I can turn them up as loud as I want, and not lose any sound quality. They fit perfectly in the dash and installing them took less than 30mins, and I've never installed speakers before. Thank you to my "expert advisor" Chuck for pointing these out to me. I'm very happy!!

Blows comprable sizes away

Written By Mikey, Houston Texas on Thursday, May 19, 2011

Crutchfield Customer Review (What's this?)

Had Kenwood speakers in my motorcycle fairing and replaced them with the Polk speakers. I have extremely loud exhaust pipes. My ears are still ringing from the speakers. Hardly no distortion at high volume. Well worth the money.

Well worth it...

Written By Holtz, Cincinnati, OH on Friday, March 25, 2011

All in all these are a great set of speakers. For the price, there aren't too many
other brands that can beat them. Clear highs, great output and they get louder
than h*ll. I'd definitely buy these again. They sound great in the dash of my 02
Jeep Wrangler (with the top down at 70mph) so I can only imagine how they
would sound as an enclosed speaker in a pod box or a door panel.

"Outfit my car" guide is wrong for 92 4Runner

Written By BrianC, Dallas, TX on Wednesday, March 23, 2011

The guide says they don't fit, but indicates the back doors and rear panels.
These ACTUALLY fit perfectly in the stock ported boxes in front dash panels.

They also sound great compared to the replacement 3" Rockford Fosgates that were
in there!

Great Sound

Written By Ryan H., Houma, LA on Sunday, March 13, 2011

Crutchfield Customer Review (What's this?)

I have these installed in the dash of my Jeep Wrangler. These speakers have
great sound and at a great price. They worked perfectly during this years
amazing Mardi Gras season when I had the top down and the doors off!!!!
Highly suggest these speakers. I have these speakers partnered with a set of
Bass Blockers so I could let my stereo push them instead of having to get an
amp to prevent them from distorting at the higher volumes! No complaints with
these great speakers!

Awesome factory replacements

Written By Brad C, Santa Rosa, CA on Wednesday, January 05, 2011

absolutely awesome! just replaced the factory speakers in my Grand Am and these are
bangin! not much bass from these little guys but i run 2 12's in the trunk so bass isnt a
problem. the highs are crystal clear and good mids. definitely an improvement over stock
and for the price you cant beat them! Polk has just made me a lifetime customer!

Great Stock Replacements...Can't beat the price

Written By Chris B, Ft. Lauderdale, FL on Thursday, December 02, 2010

Crutchfield Customer Review (What's this?)

Paired these with a new HU and the 6.5 inchers from the same series for my STI. You can't
expect alot from 4" speakers, but these definitely impress! Great SQ through out the whole
spectrum. Bottom end is a little lacking, but come on, they are 4" speakers. Great for the
price. Easy install, Crutchfield included everything with great shipping speed and awesome
customer service. These are a great option to replace stock speakers. You won't be

Great rear door speakers.

Written By alex, Bozeman, MT on Monday, November 15, 2010

Crutchfield Customer Review (What's this?)

For my installation, I had to find suitable rear-door speakers for my '07
Impreza. I was able to fit Polk MM6501's up front, so I just needed some
"filler" sound for the back. These things fit the bill. Running them with 800Hz
HPF's, I'm surprised how hard you can hit them for such little speakers.

Great Speaker

Written By Anonymous, Anderson, IN on Saturday, June 26, 2010

Crutchfield Customer Review (What's this?)

For what the speaker is it can't be beat. My only complaint is that the crutchfield website suggested a 4" speaker for the rear doors of a 2002 Toyota 4 Runner and the door could easily accomidate a 5 1/4 " - 5 1/2" ( I would have Srung For The Larger Speaker)

nice upgrade

Written By Anonymous, florida ,broward county on Monday, June 07, 2010

Crutchfield Customer Review (What's this?)

replace my kenwoods with the polk's and what a differnce compared to the kenwood
speaker's. nice clean sound and will buying more crutchfield products, shipping was
great andd install was on the money.Thanks crutchfield you have a life time customer.

Just A Great Speakers.

Written By xfactortype1, Scranon, PA on Thursday, May 27, 2010

I have a 2005 Subaru Impreza and anyone who hasone knows the rear door speaker are 4". only a few fit since there isnt much clearance. These fit with slight modification with the supplied adapters. These speakers can play much louder than the factor paper with out distorting. I installed it with dynamat with the 2 sheet speaker kit and it diesnt rattle. These speaker are highly efficient and sound great. well made and fit well. I bought the 6.5 in shallow mount to do the fronts.

Remarkable Bass as well!

Written By Anonymous, Garden Grove, CA on Sunday, March 28, 2010

As part of an upgrade project, bought a pair of these to mount in the fairing on my Honda PC800. I was shocked at how much more,and better Bass these we're able to pump out compared to the other 2 brands I tried. And how well these tiny lil speakers were able to play... for example... "Warren G." - "SummerTime in the LBC".

Had a guy the other day pay me a compliment at a stop light on the sound of my system. I'd venture to say that the system in my Moto now is probably better than 80% of the CARS on the road :) I'm happy with the highs too. Their just right... not too over-bearing, yet "Bright" and crisp.

And these are Marine certified too which is nice for a MoTo application.

Great Sound! Easy install!

Written By Anonymous, Salinas, CA on Saturday, October 03, 2009

Crutchfield Customer Review (What's this?)

What can I say, these speakers are awesome for the money! Great range
of sound. I matched them with 6 1/2's in the rear and the sound is concert
like! Don't chince on your little speakers because cheaper ones are junk!
Spend the money now so you don't have to later!

Polk Audio db401

Written By gdandy, Fort Mill, SC on Thursday, June 04, 2009

Crutchfield Customer Review (What's this?)

Excellent, crisp sound, from some a small affordable speaker.


Written By Dan, Seattle on Tuesday, March 31, 2009

Crutchfield Customer Review (What's this?)

I installed these with a Blaupunkt THB200A subwoofer in my 2005 smart car. I was blown away by how good my system sounds now!

Polk Audio db401

Written By Jeffery, San Antonio on Saturday, March 21, 2009

Crutchfield Customer Review (What's this?)

Great sound and price......also a great fit in my Chevy 1500 pickup, front doors.

Tunes for the Hot Tub

Written By Jim, Catasauqua, Pa on Wednesday, February 04, 2009

Crutchfield Customer Review (What's this?)

I had two of the four speakers that came with a used Hot tub I purchased that went bad....i couldn't beat this price... Since I needed 4 speakers to complete the set it was perfect. Due to it being so cold here right now though I only installed one because i have to make the opening a little bigger to complete the job, but it alone sounds much better than the originals.. I can't wait for the weather to warm up!

polk db401

Written By Nathaniel, chautauqua, N.Y. on Thursday, November 06, 2008

Crutchfield Customer Review (What's this?)

I installed these into a 97 pontiac grand am gt as an after market option to the original 4 x 6's in the front doors. So loud and clear they hurt my ears. Music sounds completely different with these speakers, and paralleled with 2 10 inch MA audios each pushing 300 watts RMS with a boss audio gt amp this is a crisp sounding, complete system. I'm glad i didn't try to cram 6" speakers with shallow magnets in the door, these 4" speakers are already too loud, literally (and that's just with the deck hooked to them- 45 watts per channel). Installation was a breeze, everything matched up perfectly, and there are no rattles. As an added bonus these are marine grade speakers, which is great because there is a potential of snow and muck getting tossed into these as they mount low on the door- right in swinging level with a snowy, slushy boot. I'm super satisfied, and I think these are real nice looking too.

Polk Audio db401

Written By Evan, Utah on Monday, September 29, 2008

Crutchfield Customer Review (What's this?)

Great speakers, polk audio does it again. I bought these to replace mine on my 1986 gl1200a goldwing. The tweeter sticks out a little over a centimeter past the speaker, so some modification was needed to them. These sound awesome, but are lacking bass. But 4 inch speakers don"t really produce much bass anyway. These are probably the best 4 inch speakers you can get for the money.

excellent speakers

Written By Tyrae, Davenport, IA on Monday, August 04, 2008

Crutchfield Customer Review (What's this?)

got these speakers as replacements for my honda silverwing scooter combined with a 25 watt amp and my ipod, these speaker deliver clear and vivid sound that always turns heads when i'm rolling thru town, also just was left outside in a serious thunderstorm...had to leave at work in the elements due to upon taking my scooter home the following morning the speakers were then dry and sound totally perfect....would recommend to any boat or motorcycle rider who need quality waterproof speakers.

Hands-on research

What's in the box?

Download owner's manual

  • Two 2-way speakers
  • 2 Grilles
  • 8 Self-tapping screws (length=1")
  • 8 Speed clips
  • Owner's Manual (Eng/Span/Fren /Ger/Ita/Port)
  • Online registration sheet

Features and Specs

Design 2-way
Tweeter Design 3/4" Dome
Tweeter Composition Silk/Polymer composite
Woofer Composition Polymer/Mica composite
Woofer Surround Butyl rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Sensitivity 91 dB at 1 watt
Frequency Response 85 - 22k Hz
RMS Power Range (Watts) 4-45
Peak Power Handling (Watts) 135
Impedance (Ohms) 4
Top-mount Depth (Inches) 1 7/8
Bottom-mount Depth (Inches) 1 7/8
Cutout Diameter or Length (inches) 3 11/16

Product Research


Dynamic Balance: 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.

Woofer Cones: Each speaker features a Dynamic Balance polymer/mica composite mineral-filled cone. The cones are stiff and lightweight for big sound and low distortion.

Butyl Rubber Surrounds: For a smoother response and improved durability, the woofers use butyl rubber surrounds.

Kapton Voice Coil Former: The low-mass, 2-layer Kapton Voice Coil former is lightweight for high sound output. Kapton's high melting temperature (725°F) ensures high power handling and longer reliability.

Silk/Polymer Composite Tweeters: The 3/4" liquid-cooled, silk/polymer composite tweeters provide clear, detailed highs. The tweeters use neodymium magnets.

2-way Crossover Network: The built-in 2-way crossover network sends the appropriate frequencies to each driver for cleaner sound and better imaging.

Our Product Research Team

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