Massive Audio FX Series 5.25-Inch 50-Watt-RMS 2-Way Coaxial Speakers in the Mobile Audio department at Lowes.com
Amazon.com: Pyle Car Mid Bass Speaker System - Pro 5 Inch 200 Watt 4 Ohm Auto Mid-Bass Component Poly Woofer Audio Sound Speakers For Car Stereo w/ 30 Oz Magnet Structure, 2.2”
NEW 5.25" SubWoofer Bass Speaker.4ohm Home Car Audio Woofer.5-1/4".6" frame | eBay
100w 8 Inch Subwoofer Speaker | Subwoofer Hifi 4 8 Ohm 100w - 1pcs 5.25 Inch - Aliexpress