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


6 x 9 three-way loudspeaker

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. 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.

The db690 technologies and 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 and 19mm Super Tweeter.
  • High and low pass filters (Crossovers), deliver clearer, more accurate midrange and glare-free highs, with more natural-imaging than other speakers in this class that use single stage high-pass only filters.
  • 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.
  • Muscular ABS Grilles, computer optimized and based on exclusive MOMO designs.
  • 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.
  • Polarized Nickel Plated Terminals on PCB terminal board for simple, secure wire connections.
  • Rock solid, acoustically inert Stamped Steel Basket finished in rustproof Gun Metal Gray.
  • One year parts & labor warranty.

Driver Complement

Diameter3/4" (1.91cm) 
TypeSilk/Polymer composit dome 
Diameter1" (2.54cm) 
TypeSilk/Polymer Composite dome 
Mid / Woofer
Oval Height0" (0.00cm) 
Oval Width0" (0.00cm) 
Diameter0" (0.00cm) 
Diameter0" (0.00cm) 
Oval Height9" (22.86cm) 
Oval Width6" (15.24cm) 
TypePolymer/Mica composite cone with rubber surround 


Maximum SPL0 dB
Total Frequency Response35Hz-22KHz 
Nominal Impedance4 ohms
Efficiency93 dB
Power Handling
Continuous100 watts
Peak300 watts
Voice Coil
Driver Diameter0" (0.00cm) 
Tweeter Diameter0" (0.00cm) 
Magnet Weight0.00 pounds


Oval Cut-Out Height8 1/2" (21.59cm) 
Cut-Out Diameter0" (0.00cm) 
Height0" (0.00cm) 
Length0" (0.00cm) 
Width0" (0.00cm) 
Oval Cut-Out Width5 3/4" (14.61cm) 
Tweeter Cut-Out Diameter0" (0.00cm) 
Height0" (0.00cm) 
Diameter0" (0.00cm) 
Oval Width0" (0.00cm) 
Oval Height0" (0.00cm) 
Full-Range Mounting Depth
Top Mount3 3/16" (8.10cm) 
Bottom Mount3 3/4" (9.53cm) 
Driver Mounting Depth
Top Mount with Grille0" (0.00cm) 
Top Mount without Grille0" (0.00cm) 
Top Mount without Cup0" (0.00cm) 
Bottom Mount with Grille0" (0.00cm) 
Bottom Mount without Grille0" (0.00cm) 
Bottom Mount without Cup0" (0.00cm) 
Top Mount0" (0.00cm) 
Bottom Mount0" (0.00cm) 
Tweeter Mounting Depth
Flush Mount Depth0" (0.00cm) 
Surface Mount Height11/16" (1.75cm) 
Product Weight (each)0.00 pounds


Total Shipping Weight0.00 pounds

Subwoofer Box Dimensions

Height0" (0.00cm) 
Width0" (0.00cm) 
Depth0" (0.00cm) 
Footprint Depth0" (0.00cm) 
Footprint Width0" (0.00cm) 
Internal Box Volume0.00 


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.

db690 Media

db690 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

db690 Accessories