MM522 5.25" Coaxial Speakers, Car & Marine | Polk Audio
Pyle Marine Speakers - 5.25 Inch Low Profile Slim Style Waterproof Wakeboard Tower and Weather Resistant Outdoor Audio Stereo Sound System with 180 Watt Power - 1 Pair in White (PLMRS5B) : Amazon.ca: Electronics
2) Polk Audio DB522 5.25" 600w Car/Marine/Motorcycle Speakers+Speaker - Walmart.com