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”
Aluminum Speaker Driver Unit | Bass Speaker Driver Unit | Driver Speaker Woofer - 1 6'' - Aliexpress
One unit (not pair) |15 Inch Woofer for Bass Compensation of Open Baffle or Cabinet | W-15 - Lii Song (Lii Audio), unique speaker, amplfier, quality and cost-saving parts for HiFi DIY
DD AUDIO PSW15a-D4 15" SUB WOOFER 2100W DUAL 4-OHM CAR SUBWOOFER BASS SPEAKER – ASA College: Florida