Pioneer(R) TS-W311S4 Champion Series 12" 1,400-Watt Subwoofer (Single Voice Coil)
12" Champion Series subwoofer; 1,400W max (450W nominal); IMPP composite cone; Dual-layer fiber-reinforced elastic polymer surround ; Double-stacked magnet ; New spider shape ; Independent spider holder ; Light & rigid dust cap ; Rigid, fully enclosed single-piece basket, cooling vents & aluminum voice coil bobbin; Freq resp: 20Hz-125Hz (-20dB); Single voice coil;