Car

This product is a vintage Polk model and is not available for sale, but it may still be available in some stores as a closeout or used product. The following text is taken from the original sales brochure for this product and does not reflect current availability. If you happen to have any question or concerns about this product, or any other Polk Audio product, feel free to contact our Customer Service Department at 1-800-377-7655 Monday - Friday, 9am - 5:30pm EST

db400

4-inch coaxial speaker

Available Finishes:
Additional Images

Incredible Sound/Affordable Price

Really good stuff at a really good price is where it's at. So we took really good stuff, grabbed it by the neck, held it down and force-fed it Creatine and Ginko Biloba, whatever those are.  We mixed it up with patented Polk technologies and a reckless desire for big volume output. We created speakers with better performance, bigger volume and better value -- the db Series. db Series is classic Polk Audio: outrageous performance and durability at a price that will please your wallet.

db400 Features:

  • Dynamic Balance Polymer/Mica Composite Mineral Filled Cone is stiff yet lightweight for big sound, little distortion.
  • Marine Certified Polk db Series speakers are built tough to withstand the toughest environments so they are perfect for use in boats of all types. That's why Correct Craft offers Polk Audio speakers in their award-winning Nautiques ski and wakeboarding boats.
  • 25mm Liquid-Cooled Silk/Polymer composite Dome Tweeter with Neodymium magnet for clear, detailed highs.
  • 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. Kapton's high melting temperature (725°F/400°C!) ensures high power handling and kick-butt reliability.
  • Multi-Hole Mounting Pattern and shallow depth¾ our highest vehicle application ratio for easy drop-in installations in practically any car on the road, including yours.
  • New db-design grille.
  • Durable Butyl Rubber Surround won't fall apart under the stress of extreme temperatures, sunlight or time, for years of the great Polk sound.
  • Pole Plate Heat Sink promotes better heat dissipation for superior power handling and reliability.
  • Flat Spider for faster, longer excursion linear motion.
  • Flexible Woven Leads sewn directly into Spider for greater reliability.
  • Electronic Tweeter Protection Circuit protects your tweeters from accidental abuse.
  • Reinforced, acoustically inert Stamped Steel Baskets are electrostatically powder-coated for a tough as nails finish .
  • One year parts & labor warranty.

Driver Complement

Tweeter
Quantity
Diameter3/4" (1.91cm) 
TypeSilk/Polymer composite dome 
Midrange
Quantity
Diameter4" (10.16cm) 
TypePolymer/Mica Composite cone with rubber surround 

Electrical

Total Frequency Response85Hz - 22kHz 
Nominal Impedance4 ohms
Efficiency91 dB
Power Handling
Continuous45 watts
Peak135 watts

Dimensions

Driver Mounting Depth
Bottom Mount1 13/16" (4.60cm) 

Warranty

Speaker Warranty1 year parts and labor (original purchaser) 

Specifications, dimensions and features subject to change without notice. For more information call us at 1-800-377-7655 (USA and Canada). Outside of North America call +1 (410) 358-3600.

db400 Media

db400 Literature

Want to know more? Want to dig just a little deeper to learn about this product? Here's a list of source material that will give more detail, other perspectives, and answer questions you may have.

Series Catalogs

db400 Accessories