Amazon.com: Hifonics THW12D4 Zeus Theta Series 1000 Watt Max 500 Watt RMS 4 Ohm 12 Inch Car Audio Subwoofer with 2.5 Inch Dual Voice Coils, Black : Electronics
Hifonics THW12D4 Zeus Theta 1000W Max 500W RMS 4 Ohm 12 Inch Car Audio Subwoofer, 1 Piece - Harris Teeter
HIFONICS ZEUS ZXS12D2 - 12" 500W RMS 2x2Ω Subwoofer
2) HIFONICS BXS12D4 12" 500W RMS BRUTUS SERIES DUAL 4-OHM CAR AUDIO SUBWOOFERS | eBay