Car Enclosed Subwoofer 8 "20 Cm Alpine Sbg-844br Sound Electronics Columns 87db Subwoofers For Cars Acoustics Auto Audio Parts Components Speaker - Subwoofers - AliExpress
JL Audio 8W3V3-4 | 8" 20cm W3 Series Car Sub Subwoofer Driver | 4ohm 250w RMS
GROUND ZERO GZHW 20XSPL-D1 20 cm / 8″ high quality SPL subwoofer
ESW-M8 Monolith Subwoofer, 20 cm
Kicker 43CWRT82 - 8" CompRT 2 Ohm – Santa Clarita Auto Sound