VOX Research Car Audio Indonesia - VR 8 PR BLACK - COMPACT ACTIVE SUBWOOFER 8 INCH • RMS Power 200W • THD <0.2% • Signal-to-noise Ratio >90dB • Frequency Response 40Hz -
Ultra-thin car seat audio with power amplifier subwoofer, 12V 800W car bluetooth subwoofer, frequency response:
8 Inches Subwoofer BOX / Enclosure L Ported 20hz, 25hz, 30hz, 35hz & 40hz Tuning Available Ready To Use with Terminal, Speaker Wire, Subwoofer Enclosure Box for 8 Inches Subwoofer Speaker | Lazada PH
12” home theater subwoofer box tuned to 20hz : r/AVexchange
BIC America Acoustech PL-300 Subwoofer
12 Volt 600W 8 Inch Under-Seat Car Subwoofer Powered Bass High Power 20HZ-150Hz | eBay