About the Polk Audio db5251 (Factory Refurbished)
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.
- 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
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More details on the Polk Audio db5251 (Factory Refurbished)
Features & specs
|Tweeter Design||1" Dome|
|Tweeter Composition||Silk polymer composite|
|Woofer Composition||Polymer mica composite|
|Woofer Surround||Butyl rubber|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
|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|
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.
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|
|Depth||0.825" (screw depth)||0.938"|
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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