4) Polk Audio DB651s 6 1/2 Inch 2way Car Boat Marine Audio Slim Mount Speakers
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
Polk Audio DB651 6.5" Coaxial (Pair) Silver 180 Watt Coaxial Waterproof Marine Speakers - Rock The Boat Audio
Polk Audio DB651s 6 1/2 Inch 6.5" 2way Car Boat Marine Audio Slim Mount Speakers | eBay
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
Polk DB651 Coaxial Speakers, 6.5" - Pair - Walmart.com