4) Polk Audio DB692 6X9" 450 Watt Car Audio Marine/ATV/Motorcycle/Boat Speakers - Rockville Audio
Polk Audio db1040 db Series 10" 4-ohm subwoofer at Crutchfield
Amazon.com: Polk Audio - A Pair of DB652 6.5" Coaxial and A Pair of DB572 5x7 Speakers - Bundle Includes 2 Pair : Electronics
POLK CAR AUDIO MM652 | ABC Warehouse
Polk Audio DB 652 DB+ Series 6-1/2" 2-way car speakers — also fit 6-3/4" openings at Crutchfield
DB652 6.5" Coaxial Speakers | Car & Marine | Polk Audio
Polk Audio MM 6502 Mobile Monitor Series 6-1/2" component speaker system at Crutchfield
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
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Polk Audio 6.5" 300w 2 Way Car/marine Atv Stereo Coaxial Speakers Db652 (pair) : Target
Amazon.com: Polk Audio DB522 DB+ Series 5.25" Coaxial Speakers with Marine Certification, Black : Electronics
Polk Audio 6.5" 300W 2 Way Car/Marine ATV Stereo Coaxial Speakers DB652 (2 Pair) - Walmart.com