Polk Audio db521 5.25” 2-Way Coaxial Speakers
Incredible Sound, Affordable Price
Our db Series is better than ever with superior looks and even better sound. And we've done all that at prices that make high perforamnce affordable to everyone! The db Series works well in OEM factory systems, as well as with high-powered aftermarket head units and component power amps. The db Series delivers classic Polk performance and durability like never before.
・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.
・19mm liquid-cooled silk/polymer composite dome tweeter with neodymium magnet for clear, detailed highs.
・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.
・Rock solid, acoustically inert stamped steel basket finished in rustproof gun metal gray.
・Stainless steel mounting hardware.
Cut-Out Diameter: 4 11/16" (11.91cm)
Full-Range Mounting Depth - Top Mount: 2 5/16" (5.87cm)
Grille - Height: 1" (2.54cm)
Mid / Woofer - Diameter: 5 1/4" (13.34cm)
Mid / Woofer - Type: Dynamic Balance driver with polymer/mica composite cone with rubber surround
Tweeter - Diameter: 3/4" (1.91cm)
Tweeter - Type: Silk dome
Efficiency: 93 dB
Nominal Impedance: 4 ohms
Total Frequency Response: 60Hz-22kHz
Power Handling - Continuous: 45 watts
Power Handling - Peak: 135 watts