About the Polk Audio db5251
Polk precision
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. And Polk certifies their db Series speakers for marine applications, so they're a great choice for your boat, motorcycle, or ATV.
Installation note: You'll need a pair of our universal backstraps to install the tweeters in the factory locations.
Priced per system
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)
- marine-certified for use in boats, convertibles, motorcycles, and ATVs
- 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
- MFR # AA5251-A
What's in the box:
Polk Audio db5251 owner's manual
- 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 for Polk Audio db5251
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Average review:
4.5 out of 5 starsCustomer photos
This review was collected as part of a promotion
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More details on the Polk Audio db5251
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
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"
The Polk Audio db5251 replaces these items
Polk Audio MM5251
- woven honeycomb glass fibre composite woofer
- 1" silk composite dome tweeter
- certified for marine use
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Customer Q&A
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These Polk speaks kick butt! The highs are so clear and loud (amped at 100 watts per channel RMS) I can hear every nuance in my rock and roll. I never thought speakers could sound so good.
sickcured from Slidell, LA