MASSIVE AUDIO HIPPO 84-V2 8" 500W RMS DVC 4-OHM CAR AUDIO SUBWOOFER HIPPO84 SUB 623169610615 | eBay
Amazon.com: pkg SOLID1 - Focal Monoblock 470 W RMS Power Amplifier + Pair of SUB P30 - Focal 12" 250W RMS 500W Max Single 4-Ohm Subwoofer : Electronics