2) Hifonics ZW12D4 Zeus 12" 1200 Watt 4-Ohm Car Subwoofers + Dual Vented Sub Box 2) New Hifonics ZW12D4 Zeus 12" 1200 Watt Dual 4 Ohm Car Audio Power Subwoofers Subs Power Handling RMS: 300W (600W per pair) Power Handling MAX: 600W (1200W per pair) Impedance: Dual 4 Ohm Foam Surround