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Polk Audio db400 4" 2-way car speakers
Certified for marine use

Item # 107DB400

First and foremost a speaker company, Polk Audio designs and builds speakers that give you top-end performance,...

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First and foremost a speaker company, Polk Audio designs and builds speakers that give you top-end performance,...

Item # 107DB400

About the Polk Audio db400

Ken Nail
First and foremost a speaker company, Polk Audio designs and builds speakers that give you top-end performance, even at middle-of-the-road prices. And the db Series' cutting-edge looks, textured woofer cones, and MOMO-inspired, wheel-style grilles add a stylish touch to your ride as well.

First and foremost a speaker company, Polk Audio designs and builds speakers that give you top-end performance, even at middle-of-the-road prices. And the db Series' cutting-edge looks, textured woofer cones, and MOMO-inspired, wheel-style grilles add a stylish touch to your ride as well.

The db400 4" speaker features a polymer/mica composite woofer for crisp and clean midbass. The woofer's rubber surround improves performance and lengthens the speaker's life span. You'll enjoy the smooth highs produced by the sweet-sounding silk/polymer dome tweeters.

Instead of the simple high-pass filter found in most car speakers, a more sophisticated 2-way crossover network ensures that woofer and tweeter handle only the appropriate frequencies. The result? Clean sound and accurate imaging. These speakers aren't just limited to use in your car — they've passed tough environmental testing that certifies them for marine use.

Priced per pair
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Product highlights:

  • 2-way 4" car speakers
  • polymer/mica composite woofer with butyl rubber surround
  • liquid-cooled, silk/polymer composite 3/4" dome tweeter
  • certified for marine use
  • 2-way crossover network
  • recommended power range: 4-35 watts RMS
  • peak power handling: 105 watts
  • frequency response: 85-22,000 Hz
  • sensitivity: 91 dB
  • top-mount depth: 1-13/16"
  • warranty: 1 year
  • MFR # AA0405-B

What's in the box:

  • Two 2-way speakers
  • 2 Grilles
  • 8 Self-tapping screws (length=1")
  • 8 Speed clips
  • Owner's Manual
  • Online registration sheet

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More details on the Polk Audio db400

Pat M.

Features & specs

General
Speaker Size
Design 2-way
Tweeter Design 3/4" 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) 91
Sensitivity at 2.83 volts N/A
Frequency Response 85 - 22k Hz
Minimum RMS Wattage 4
Maximum RMS Wattage 35
Peak Power Handling (Watts) 105
Top-mount Depth (Inches) 1 13/16
Bottom-mount Depth (Inches) 1 7/8
Cutout Diameter or Length (inches) 3 11/16
Mounting Height (Inches) 0.421
Frame Width 4.026
Frame Length 4.026

Product Research

Features

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.

Marine Certified: Polk db Series speakers are built to withstand exposure to moisture and UV rays, so they work well in boats and cars.

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.

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

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

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