20cm slim subwoofer 275W max bass speaker 8" car woofer installation depth 64 mm 4260101643629 | eBay
Focal P 20FSE 20cm slim subwoofer
Memphis Audio PRXS1240 12" Power Reference Single 4-Ohm Shallow Mount Subwoofer - 350 wRMS - Creative Audio
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