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”
Dayton Audio - E150HE-44 5-1/2" DVC MMAG Extended Range Subwoofer 4 Ohm per Coil
KRK Rokit 5 G4 5-inch Powered Studio Monitor Pair With S10.4 10-inch Powered Studio Subwoofer Bundle | Sweetwater
Hi-Vi L5-8R 5" Woven Kevlar Cone Woofer
Tang Band W5-1138SMF 5-1/4" Paper Cone Subwoofer Speaker
Pyle PLPW8D 8In 800W Car Audio Subwoofer Sub Power Woofer DVC 4 Ohm, Black - Walmart.com