Dayton Audio HTS545HE-4 Kraken 21" High Excursion Subwoofer with 5" Voice Coil 4 Ohm
6.5” XBL² Woofer - Bold North Audio | MISCO Speakers
Amazon.com: Pyle 12' Car Audio Speaker Subwoofer - 1600 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System - Non Press Paper Cone, 90 dB, 40 Ohm, 60 oz Magnet, 2
AudioPipe TXX-BDC2-12 High Power 1500W 12" 4 Ohm DVC Car Audio Subwoofer, Black - Walmart.com
DEFINITIVE TECHNOLOGY NEW PROSUB 1000 10" 750w High-Output Subwoofer Black | Accessories4less