5 CORE 8" Full Range Subwoofer Car Audio Speakers, RMS 50W Peak 500W, 4 Ohm Car Vehicle Audio Full Range Drivers, Wide Range DIY Loudspeaker Woofer Replacement WF 890 DBL - Walmart.com
48TCWRT122 KICKER 12" CompRT Subwoofer Single Loaded Enclosure 500W RMS 2 Ohm — Pro Audio Center