STLF-1504-8 | 15" 450W Raw Subwoofer Replacement w/ 4" Voice Coil, 8-ohm – Sound Town
Amazon.com: CHOOYO 50W 4Ohm 8Ohm Car Subwoofer 4 Inch Woofers Speaker in Car Bass Speaker Long Stroke Loudspeaker for Automotive Sound Box IPC (Color : 1 Piece-8Ohm) : Electronics
Dayton Audio RSS265HF-8 10" Reference Series HF Subwoofer 8 Ohm