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


5.25 inch coaxial loudspeaker

Available Finishes:

Incredible Sound/Affordable Price

Like all db Series loudspeakers the db525 is made with patented Polk technologies and the goal of squeezing the most performance out of a relatively small driver.

The db525 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.
  • 19mm Liquid-Cooled Silk/Polymer composite Dome Tweeter with Neodymium magnet for clear, detailed highs.
  • 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) 
Mid / Woofer
Diameter5 1/4" (13.34cm) 


Total Frequency Response60Hz-22Khz 
Nominal Impedance4 ohms
Efficiency93 dB
Power Handling
Continuous90 watts
Peak200 watts


Cut-Out Diameter4 13/20" (11.81cm) 
Full-Range Mounting Depth
Top Mount2 5/8" (6.67cm) 
Bottom Mount2 421/1000" (6.15cm) 
Tweeter Mounting Depth
Surface Mount Height3/10" (0.76cm) 


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.

db525 Media

db525 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

db525 Accessories