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TS-A300D4
Audio Visual World - Pioneer TS300S4 - 30cm (12") 4Ω Single Coil D-Series Pioneer Champion Series PRO Subwoofer - Replacement for Pioneer TS-W3003D4 TS-W3002D4, and TS-W3001D4.
1x Pioneer TS-300D4 12 inch 1400 Watts 4-Ohm Dual Voice Coil Car Audio Subwoofer 637740964585 | eBay
PIONEER W120D4 SUB WOOFER SOUND TEST IN ENCLOSURE. - YouTube
Pioneer TS-G1020F 4" Car Audio Dual Cone Coaxial Speakers - Ayon Motors