Amazon.com: Pyle 5.25” Car Sound Speaker (Pair) - Upgraded Blue Poly Injection Cone 3-Way 200 Watt Peak w/Non-fatiguing Butyl Rubber Surround 100-20Khz Frequency Response 4 Ohm & 1" ASV Voice Coil -
Amazon.com: BOSS Audio Systems CH5530B Chaos Series 5.25 Inch Car Stereo Door Speakers - 225 Watts Max, 3 Way, Full Range Audio, 1 Inch and 0.5 Inch Tweeters, Coaxial, Sold in Pairs : Electronics
Cadillac 5.25-Inch Front Door Speakers – Retro Manufacturing