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Product Packaging:Standard Packaging Product Description The latest generation of db Series loudspeakers is better than ever with superior looks and even better sound. And we’ve done all that at prices that make high performance affordable to everyone! The db Series works well in OEM factory systems, Amazon.com Polk Audio db401 4′ 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 multi-hole mounting pattern and shallow depth make for easy drop-in installations in practically any car on the road. 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.