Replacement 8" Woofer Speaker 13 Oz Magnet 500W PMPO Car Home Audio STEREO 4 Ohm - Walmart.com
Best 8-Inch Subwoofers for Your Home - Premium Sound in a Small Package - HomeTheaterReview
Amazon.com: MB Quart DS1-204 Discus Shallow Mount Subwoofer (Black) – 8 Inch Subwoofer, 400 Watt, Car Audio, 2 Inch Voice Coils, UV Rubber Surround, Best in Sealed Enclosures : Electronics