5 1/4-inch coaxial loudspeaker
5 1/4" coaxial
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.
The db521 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.
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.
One year parts & labor warranty.
All Polk products are made using the best materials and the most advanced manufacturing techniques. They pass the industry’s most exhaustive quality tests, including drop testing, extreme signal response and UV & salt exposure testing. Polk loudspeakers are built to perform for a lifetime.
|Mid / Woofer|
|Diameter||5 1/4" (13.34cm)|
|Type||Dynamic Balance driver with polymer/mica composite cone with rubber surround|
|Total Frequency Response||60Hz-22kHz|
|Nominal Impedance||4 ohms|
|Cut-Out Diameter||4 11/16" (11.91cm)|
|Full-Range Mounting Depth|
|Top Mount||2 5/16" (5.87cm)|
|Bottom Mount||2 7/16" (6.19cm)|
|Speaker Warranty||1 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.
6 reviews with an average of 5Write your own review
by Mike C, March 21, 200991 out of 158 people found this review helpful.
These speakers fit nicely in a custom radio fairing, for my Victory motorcycle.
Great speaker for the size.
by Jorge Rossello, January 13, 200875 out of 164 people found this review helpful.
Good highs, get loud enough.
Distortion at high volumes, dont go very low.
Good speakers for a back fill-in. Good highs, cant go too loud but thats why they are fill-ins.
by Guitar_junkie134, January 1, 200972 out of 137 people found this review helpful.
Amazingly clear highs and detail, go very low for 5-1/4's
I bought these speakers for my seat convertible, they do distort as u bring up the volume, but after awhile u realize that its the amp collapsing, the built in crossover helped solve this, however they def need a good amp.
by Jentrie Schmidt, February 19, 200971 out of 155 people found this review helpful.
Nice range on the highs for fillers!!
Could use a little mor low end!! A LITTLE THOUGH!!!!
Highs are good but could go on the deeper end a little more.but they are 5 and a 1/4's for a reason I suppose!!! All in all VERY decent speakers for a filler!!!
by Ed S, April 15, 201059 out of 109 people found this review helpful.
Great highs well built If your amp sucks so will your sound I ran these on a high end tube amp and also a 150 amp Carver and they will take all the clean power there rated for. No Distortion if your amp is clean so is your sound
Not really a weakness but the typical low limits of a 5 1/4" speaker bass was still decent...
These are very good speakers very crisp and handle power well I read keep reading reviews about distortion and people need to know speakers don't distort Amps do. If your having distortion with these speakers you need a better amp.
by Jason, November 6, 201117 out of 26 people found this review helpful.
Clear and crisp sound with a excellent amount of bass for 5 1/2
When i first tried it out for the first time i was amazed how clear sounding it was.. So far i have it connected to a cheap chinese amp pushing out 40 rms of power. The chinese Amp has a higher rated distortion rating compared to other amps but these db521 played crisp and clear let alone bass is very good for 5 1/2. I assume it would even sound better in a car thogh... mines is mounted into my back pack XD
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