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Polk Audio db5251 (Factory Refurbished)

5-1/4" component speaker system

Item # 997DB5251

Good music becomes great when you hear it through Polk's db Series car speakers.

Find what Fits your vehicle

Good music becomes great when you hear it through Polk's db Series car speakers.

Discontinued item
1 question - 1 answer

Item # 997DB5251

Car-specific installation packages

Deep discounts on the essential accessories that help your new gear work with your car.

Free custom vehicle instructions

Installation help for your car, from our experts.

Free lifetime tech support

Whenever you need a hand.

About the Polk Audio db5251 (Factory Refurbished)

Polk precision

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 Audio db5251

Polk precision

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 versatile db5251 component speaker system features 5-1/4" 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 1" silk/polymer dome tweeters use powerful Neodymium magnets to deliver precise high-frequency reproduction, enveloping you in bright musical detail. You can surface- or flush-mount the tweeters with the included swivel-mount cups. Just aim the tweeters so they broadcast toward your ears, creating a powerful stereo image.

External crossovers direct the right frequencies to the tweeters and woofers to maximize their performance, and their housings let you hide all wiring for a clean, professional look. These speakers feature stainless steel mounting hardware, plus muscular ABS grilles that will add a stylish touch to your car's interior. 

Installation note: You'll need a pair of our universal backstraps to install the tweeters in the factory locations.

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Product highlights:

  • component speaker system includes two 5-1/4" woofers, 2 tweeters, and 2 crossovers
  • Dynamic Balance polymer/mica composite woofers with butyl rubber surrounds
  • Kapton voice coils
  • 1" liquid-cooled silk/polymer composite dome tweeters
  • flush- and surface-mount swivel cups
  • Neodymium tweeter magnets
  • electronic tweeter protection circuits
  • 2-way external crossover network (12 dB/octave, 4,000 Hz high- and low-pass)
  • ABS wheel-design grilles
  • stainless steel mounting hardware
  • power range: 10-100 watts RMS (250 watts peak power)
  • frequency response: 53-23,000 Hz
  • sensitivity: 93 dB
  • top-mount depth: 2-5/16"
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # db5251

What's in the box:

  • 2 Woofers
  • 2 Grilles
  • 2 Tweeters (each tweeter has attached 38" speaker leads)
  • 2 Flush-mount cups
  • 2 Metal flush-mount clamps
  • 2 Surface-mount cups
  • 2 Crossovers
  • Four 39" lengths of speaker wire (each length of wire has female quick-slides on one end and tinned wire on the other end)
  • 16 Self-tapping screws
  • 10 Speed clips
  • Owner's Manual (Eng/Span/Fren/Ger/Ita/Port)
  • Online registration sheet

Customer reviews

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Polk Audio db5251 (Factory Refurbished) reviews

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More details on the Polk Audio db5251 (Factory Refurbished)

Pat M.

Features & specs

General
Speaker Size
Design 2-way
Tweeter Design 1" Dome
Impedance (Ohms) 4
Tweeter Composition Silk polymer composite
Woofer Composition Polymer mica composite
Woofer Surround Butyl 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 53 - 23k Hz
Minimum RMS Wattage 10
Maximum RMS Wattage 100
Peak Power Handling (Watts) 250
Top-mount Depth (Inches) 2 5/16
Bottom-mount Depth (Inches) N/A
Cutout Diameter or Length (inches) 4 3/4
Mounting Height (Inches) 0.161

Product Research

Woofers
Tweeters
Crossovers

Woofers

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 Formers: The low-mass 2-Layer 1" Kapton Voice Coil formers are lightweight for high sound output. Kapton's high melting temperature ensures high power handling and excellent reliability.

Pole Plate Heat Sinks: The pole plate heat sinks promote better heat dissipation for superior power handling and reliability.

Tweeters

Silk/Polymer Composite Tweeters: The 1" liquid-cooled, silk/polymer composite tweeters provide clear, detailed highs.

Mounting: The supplied mounting cups allow you to surface- or flush-mount the tweeters. The tweeters swivel in the flush-mount housings, allowing you to adjust them for optimum imaging.

Tweeter Mounting Dimensions:

  Surface Mount Flush Mount
Mounting Height 1.046" 0.364"
Depth 0.825" (screw depth) 0.938"
Frame Diameter 2.002" 2.297"
Cutout Diameter   N/A 1.951"

Crossovers

2-Way Crossovers: Each Butterworth outboard crossover features a 12dB/octave, 4000Hz high-pass network for the tweeter and a 12dB/octave, 4000Hz low-pass network for the woofer.

Tweeter Attenuation Switch: You can adjust the output of the tweeter to match a level appropriate to your vehicle or your system. On the end of crossover (opposite the terminals), the tweeter attenuation switch can be set to 0dB, -3dB, or +3dB.

Electronic Tweeter Protection Circuits: Each crossover has a built-in protection circuit that guards the tweeter against accidental damage from high power.

Crossover Connections: The crossover inputs and outputs are screw terminals. The crossover housing is vented, giving you a choice of hidden wire channels for easier, more professional-looking installs.

Mounting: There are two mounting holes in the base of each crossover.

Crossover Dimensions: L=5.029", W=3.072", H=1.075"

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Customer Q&A

1 question already asked

Q
What is the difference between this component and the 5250?
[ jorge  Aug 25, 2016 ]
1 answer
A
Thanks for your question. For information on comparing two or more models 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 and help you make the best choice for your system and your budget.
[ Krissy  Aug 26, 2016 ]  Staff

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