Amazon.com: Pyle 10" Car Audio Speaker Subwoofer - 1000 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System - Non Press Paper Cone, 90 dB, 4 Ohm, 50 oz Magnet, 2
Amazon.com: HERTZ SPL Show Series SV-200L 8 in. (200mm) SPL 4-Ohm Woofers (Pair) : Electronics