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Polk Audio db5251 5-1/4" 2-way Component System

db Series (Marine Certified) (db 5251)

4.8

(12 reviews)

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Specials with this product

  • Free Ground Shipping to the 48 statesdetails
  • 5-1/4" db Series (Marine Certified) 2-way Component System
  • Power Handling:
    • Peak: 500 watts per set / 250 watts each side
    • RMS: 200 watts per set / 100 watts each side
  • Impedance: 4 ohms
  • Dynamic Balance polymer/mica composite mineral filled cone is stiff yet lightweight for big sound, little distortion
  • 25mm liquid-cooled silk/polymer composite dome tweeter with neodymium magnet for clear, detailed highs
  • 12 dB / octave Butterworth outboard crossover for fiddle-free perfect sound
  • Flush & surface mount swivel cups allow placement flexibility and soundstage optimization
  • Low-mass 2-Layer 25mm Kapton voice coil former is lightweight for high sound output
  • Multi-hole mounting pattern and shallow depth for easy drop-in installations in most cars
  • ABS Grilles, computer optimized and based on exclusive MOMO designs
  • Durable butyl rubber surround won’t fall apart under the stress of extreme temperatures, sunlight or time
  • Pole Plate Heat Sink promotes better heat dissipation for superior power handling and reliability
  • Acoustically inert stamped steel basket
  • Flat Spider for faster, longer excursion linear motion
  • Flexible woven tinsel leads sewn directly into Spider for greater reliability
  • Electronic tweeter protection circuit protects your tweeters from accidental abuse
  • Vented crossover housing gives you a choice of hidden wire channels for easier, more professional-looking installs
  • Frequency Response: 53-23,000 Hz
  • Sensitivity: 93 dB
  • 1-year SonicElectronix.com warranty

Priced Per Pair

Speaker Specifications
Speaker Size5-1/4"
Design2-way Component System
Tweeter DesignDome
Tweeter CompositionSilk-Polymer Composite
Woofer CompositionPolymer/Mica Composite
Woofer SurroundRubber
Peak Power Handling250 watts
RMS Power Handling100 watts
Sensitivity93 dB
Frequency Response53 - 23,000 Hz
Impedance (Per Voice Coil)4 ohms
Shallow Mount InstallationNo
Top-Mount Depth2-5/16"
Bottom-Mount Depth2-7/16"
Cutout DimensionsN/A
Speaker GrillesYes
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration1 year
Labor Warranty Duration1 year
Warranty ProviderSonic Electronix
Customer Review Summary for Polk Audio db5251 5-1/4" 2-way Component System
Average Customer Rating is 4.8 out of 5 stars:
4.8
based on 12 Reviews
Share your thoughts with others:
Rating Distribution:
5 star:
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75%
4 star:
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25%
3 star:
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0%
2 star:
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0%
1 star:
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0%
what's this?
Average Attributes Rating:
Durability
4.7
Value
4.9
Features
4.6
Design
4.7
Usability
4.8
what's this?
Most Helpful Customer Reviews:
February 6, 2012 Good Quality Speaker System
1 of 1 people found the following review helpful:
Review by
ALEXANDER from Newark, CA
Overall
Durability
Value
Features
Design
Usability
I purchased this speakers system to upgrade my OEM radio speakers on my 1997 BMW M3. I installed the speakers one at a time and then listened to the same music that I am familiar with. I first replaced the left 5 1/4 kick panel speaker and then listened to the music at different volume levels. I could only discern very slight improvement in mid bass. Got the same result with the right kick panel speaker. Just slightly tighter mid bass which may not be felt by an untrained ear. Next were the tweeters. Same procedure, one at a time, then listen for any improvement. This time was definitely a jump in improvement. I can better hear the cymbals, the esses coming out of the lips of the singer and hand movement of the guitar player sliding on the instrument. I decided to keep the system for this improvement alone. After completing the install, I rested a bit, sat in the drivers seat, and listened to the music in all it's entirety. Sound is better, but not to my delight yet. Next project, the head unit.
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February 24, 2012 I love these speakers !
Review by
Fish from Sacramento CA
Overall
Durability
Value
Features
Design
Usability
I had one set of these in my truck for about 1-1/2 years. They sounded fantastic. So when I upgraded my subs and mid-bass (two 15's and four 8's), I decided to get another set of the db5251's to keep up.

IMHO, these are the best value for any component sets on the market. I love the soft dome tweets. Never harsh. They are just really loud and clear. What more can I say.
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November 15, 2011 Efficient and clear
Review by
Chris from Houston, TX
Overall
Durability
Value
Features
Design
Usability
I installed the Polk db5251 set to replace front speakers in an old Corvette. Midranges are in the stock location. Tweeters are mounted high on the doors. Despite being driven by only 14 watts RMS per channel, these speakers can put out considerable volume. They are efficient, sound fantastic, and are very clear. The sound is so good (paired with a new Pioneer AVH-3300BT) that I have no need for a separate amp.
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October 28, 2011 Clean and crisp sound
Review by
tj from Cuyahoga Falls, OH
Overall
Durability
Value
Features
Design
Usability
I wanted marine rated component speakers because they are going into the fairing on my 08 Harley Ultra. I originally replaced stock ones with Hog Tunes front and back. The Polks far surpass the Hog Tunes for clarity and crispness, they also have better bass response. That is why I just ordered the coaxial version of these to put into my rear speaker pods. Thanks again to the people at Sonix for reasonable prices and top notch service!
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August 11, 2011 Yes, I like Polk!
Review by
Vince In Houston from Houston, TX
Overall
Durability
Value
Features
Design
Usability
I purchased the Polk Audio db5251. I tend to prefer Polk products because they sound great and are durable in the humid Houston heat. I bought them in the early Spring and they are lasting through their first Houston Summer. I've owned other Polk speakers in the past specifically because they last through several Summers before I have to replace them and the price I found them for here is really great!
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View All 12 Reviews for Polk Audio db5251 5-1/4" 2-way Component System
Speaker Wire
Upgrade your factory speaker wire to aftermarket speaker wire and hear the difference! Using thicker gauges, newer technology, and higher quality materials, aftermarket speaker wire is key to upgrading the sound in your car.
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20 ft. of 16 AWG KICKER X-Series Speaker Wire20 ft. of 16 AWG KICKER X-Series Speaker Wire
Get high quality sound from Kicker's twisted-pair, true to gauge speaker wire.
$19.99
50 ft. of 14 AWG StreetWires Speaker Cable50 ft. of 14 AWG StreetWires Speaker Cable
Streetwires Super Cable provides a zero-grip insulation for a smooth install as well as true gauge twisted wire construction.
$29.99
Sound Dampening Material
Get optimal sound from your new speakers with some high quality sound dampening material. It will keep the road noise out and the music inside the car.
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NVX SDSK2 Speaker KitNVX SDSK2 Speaker Kit
Eliminates speaker panel distortion and reduces vibration, rattles, and squeaks!
$19.99
NVX SDRLR1 Sound Dampening Rubber RollerNVX SDRLR1 Sound Dampening Rubber Roller
Install your Sound Dampening with ease! This heavy duty rubber roller is designed specifically to install your NVX products!
$8.95
Speaker Baffles, Spacers, and Depth Extenders
Mount your speakers in the location that you need with these speaker spacers, extenders, and adapters.
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Speaker Baffles for your SpeakersSpeaker Baffles for your Speakers
Enhance the sound of your speakers with these easy to install speaker baffles.
$9.99
3/4" Depth Extender for 5-1/4" Speakers3/4" Depth Extender for 5-1/4" Speakers
Add 3/4" of extra space when installing your speakers.
$8.99
Installation, Tools & Accessories
Get all of the tools and accessories to install your new speakers like a professional, or take your car to an expert and have them installed by redeeming professional installation cards.
 ProductPriceAdd?
Door Panel & Upholstery Remover ToolDoor Panel & Upholstery Remover Tool
The ideal tool for removing your car's door panels to replace you speakers!
$11.99
Universal Window Handle Remover ToolUniversal Window Handle Remover Tool
Designed to easily remove the manual window handles without breaking any interior pieces.
$4.99
Universal Wire Puller & GrabberUniversal Wire Puller & Grabber
Running wires has never been easier! This wire puller allows you to run wires through those hard to reach places!
$8.99
Tone Generators and Sound Testing Equipment
Optimize your new system's sound quality by testing and calibrating all of your components with these items.
 ProductPriceAdd?
AutoSound 2000 CD-101AutoSound 2000 CD-101
Low frequency test CD
$12.99
AutoSound 2000 CD-102AutoSound 2000 CD-102
High frequency test CD specifically designed for the set-up and evaluation of sound system imaging and placement.
$12.99
AutoSound 2000 CD-103AutoSound 2000 CD-103
Audiophile reference series test disc for evaluation of all audio components.
$12.99
Main Product
 ProductPriceAdd?
Polk Audio db5251Polk Audio db5251 5-1/4" 2-way Component System$139.99

Product Summary

Manufacturer: Polk Audio
Model number: db5251
UPC: 747192112806
Weight: 5.50 lbs
Internal SKU: db5251
Internal product ID: 9112

Price Information

$209.99

–$70.00

$139.99

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Customer Testimonial

This is the third order I have done with Socic Electronix. All three orders arrived in perfect condition and in a timely matter. All three products performed exactly as advertised. You can order electronics from this site with a lot of confidence.

- John from Jacksonville, FL

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