0ur opinion:

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Polk Audio DB series is better than ever with superior looks and even better sound. And they have done all that at prices that make high performance affordable to everyone! The DB series works well in 0EM factory systems, and delivers classic Polk Audio performance and durability like never before.

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Polk Audio db521 5.25' Coaxial Speakers bring you superior looks and sound at a price that makes high performance affordable to everyone. The polymer/mica composite mineral filled cone is stiff yet lightweight and brings you big sound with little distortion. A 19mm liquid-cooled silk-polymer composite dome tweeter with neodymium magnet creates clear, detailed highs. The Pole Plate Heat Sink promotes better heat dissipation for superior power handling and reliability. Polk db Series speakers are built tough to withstand the harshest environments, so they are perfect for use in boats of all types. The db Series delivers classic Polk Audio performance and durability like never before.








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Buyer's feedback: - * excellent speaker - HIGHLY recomended!!! ...
From the moment I took them out of the box I was impressed. Nicely stamped steel basket of quite sturdy material with a high quality rubber surround and poly cone. After putting them into the "custom" holes in the door panels of my '88 Jeep Wrangler and hooking them to the head unit I fired them up and was completly Blown Away! The highs are crisp and oh so clean, the mids make sax's sound like sax's and guitars sound like guitars, the mid bass kick is nice and solid with not-a-speck of mushiness. But it's the tweeter thats the killer in this unit for sure. It just sings! The crash of cymbals is so natural and clean, female voices, everything just sounds so natural coming out of these beauties.
And talk about "attack", it's here in spades. Try cranking up Hendrix's "Machine Gun" and see if all the little hairs on the back of your neck don't just stand straight up!
Now, all I have them powered by is the head unti at this point, a full 7 watts or so I imagine, and trust me when I say the head unit amp gives out long before the speakers do. The db's just play louder and louder until the amp begins to distort, all the while showing no sign of distortion themselves. They cry to be driven by a good powerful amp!
This is the first speaker I have ever had in my Wrangler in the 19 years or so that I have been driving it that can play loud enopugh to be heard over the wind on the highway! Just love these babies and can't wait to get more! Maybe the 4x6 for the dash spots?
P.S. These speakers would dovetail very nice with a good subwoofer. They sound nice and tight down to their limit.
P.P.S Bolt these speakers down TIGHT ! They are serious air moving pistons and they will shake like crazy. I suggest something metal!