composite dome
Polk Audio DB521 5.25-Inch Coaxial Speakers
- Pair of marine certified speakers perfect for use in boats of all types
- Equipped with a 0.75-inch liquid-cooled silk-polymer composite dome tweeter
- Maximum input power: 135 watts
- Equipped with a dynamic balance polymer/mica composite mineral-filled cone for a big sound
- Durable butyl rubber surround stands up to the stress of extreme temperatures, sunlight and time
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Polk Audio DB651 6.5-Inch Coaxial Speakers
- 6.5-inch high-performance marine-certified coaxial speakers, perfect for boats of all types
- 180 Watts power handling with 4-ohm impedance
- 0.75-inch liquid-cooled silk-polymer composite dome tweeter
- Polymer/Mica composite cone with butyl rubber surround for big sound and durability
- Swivel-mount tweeter allows precise aiming of sound
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