PAIR BOSS P106DVC 10" 4200 Watt Car Subwoofers - 2100 Watt MAX (4200 Watt PAIR) - 1050 Watt RMS (2100 Watt PAIR) - DUAL 4 Ohm Voice Coils - Poly Injected Cone - Competition Style Binding Posts - Impedance: 4 Ohm - 2.5" Voice Coil - Efficiency: 96 dB - Frequency Response: 35Hz-2.2kHz - Mounting Depth: 6-3/8" Series: Phantom Type: Subwoofers Cone Material: Poly Injected Surround Material: Rubber Voice Coil: Dual Voice Coil Construction: 2.5" Voice Coil RMS Power: 2100 Watt MAX Frequency Response: 35Hz-2.2kHz