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Ultramarine 7.7" Speakers - BlackPolk's Ultramarine speakers are designed to produce maximum sound in marine applications.  Featuring "Air Suspension" technology and high-temperature voice coils, the Ultramarine family of speakers will crank up to...

10" Subwoofer Ultramarine - SilverPolk's marine subwoofers have always been known for intelligent design, impressive sound, and weather resistance. The UMS108 sub continues this tradition with solid construction that stands up to the elements.The UMS108...

Stereo Cover f/MS-SRX400 Apollo SeriesKeep the front face of your Apollo stereo protected and free from dust with the Marine Stereo Dust Cover for the MS-SRX400.Made of silicone. Compatible With:MS-SRX400*Sold as an Individual WARNING: This...

Stereo Cover f/MS-RA770 Apollo SeriesKeep the front face of your Apollo stereo protected and free from dust with the Marine Stereo Dust Cover for the MS-RA770.Made of silicone. Compatible With:MS-RA770*Sold as an Individual WARNING: This...

Stereo Cover for 650 & 750 Series StereosKeep the front face of your Fusion 650 or 750 Series stereo protected and free from dust with the Marine Stereo Dust Cover.Made of silicone. Compatible With:Series 650 Fusion StereosSeries 750 Fusion...

4" BM40AMPBT Amplified Waketower Speakers - Matte Black - 500WThese Matte Black 8" BM40AMPBT Amplified waketower speakers provide next-level audio through a stylish design.  Boss Audio  tower speakers are marine grade, so you can have...

PS-A43SPB Sound Panel Spacer 43mm - BlackThe Sound-Panel has three accessory mounting spacers available to create a professional indoor or outdoor install, where cavity depth prevents standard speaker installation.Installation:Simply select the spacer...

Apollo MS-SRX400 Stereo w/AM/FM/BT - Single Zone w/DSPIf you want to build a cutting-edge multi-zone audio system on your boat, Fusion's Apollo Series has everything you need.  Start with a Fusion MS-RA770 or MS-RA670 touchscreen marine receiver,...

Apollo MS-RA770 Touchscreen AM/FM/BT/SiriusXM Stereo - 4 Zone with DSPThe world’s first touchscreen marine stereo with Apple AirPlay 2 and built-in Wi-Fi, the Apollo RA770 has redefined audio excellence with revolutionary technology and innovative...

MS-CBUUSB3.5 Panel Mount USB & 3.5mm Headphone JackThe Fusion MS-CBUSB3.5 panel mount auxiliary connector features a two meter (6.5 foot) USB and 3.5mm auxiliary extension cable. Perfect for limited space in areas such as the helm and fly-bridge...

Satellite Radio Antenna with Mounting KitRS100 is a very high performance marine satellite radio antenna, rugged, small and very easy to install thanks to the integrated magnetic mount and the supplied 7M (23’)coax cable with SMB termination...

NMEA 2000 Compatibility Kit This NMEA 2000 Kit allows Polk's Ultra Marine Certified P1 and PA4A to be seamlessly added to your boat's onboard NMEA 2000 network, enabling control and two-way communication from your boat's Garmin and Raymarine...