Polk Audio - Two Pairs Of DB692 6x9"Coaxial Speakers - Marine and Powersports Certification - Creative Audio
4) Polk Audio DB692 6X9" 450 Watt Car Audio Marine/ATV/Motorcycle/Boat Speakers - Rockville Audio
Polk Audio DB521 5.25" Coaxial (Pair) Silver 135 Watt Coaxial Waterproof Marine Speakers - Rock The Boat Audio
DB522 5.25" Coaxial Speakers | Car & Marine | Polk Audio - 5.25" Coaxial Speakers with Marine Certification (Pair) | Polk - US
Amazon.com: Polk Audio DB651 6.5"/6.75" 2-Way Marine Certified db Series Car Speakers with Liquid Cooled Silk Tweeters (Discontinued by Manufacturer),silver/black : Everything Else
DB402 4" Coaxial Speakers | Car & Marine | Polk Audio - 4" Coaxial Speakers with Marine Certification (Pair) | Polk - US
(2) Polk Audio DB402 4" 270 Watt Car Audio ATV/Motorcycle/Boat Speakers +Rockmat
Polk Audio DB6502 6.5" Component Speaker System with Marine Certification