Pioneer TS-SW251 10" Car-Use Component Subwoofer 800WMax
Max music power 800w
Nominal power 200w
Speaker size 10"
Impedance 4 Ohms
Sensitivity 89 dB +/- 1.5dB (in car, input: 1 w)
Frequency response 20 Hz to 144 KHz (-20 dB in car input: 1 w)
Gross weight 4.2 kg 9lb 5 oz

Pioneer created a patent-pending air suspension system that locks air between a main cone and a drive cone. The cones move together in unison, with the locked-in air behaving like a spring. The dual-cone structure is a spider-less design that maintains better sound linearity, and reliability even after many of hours of hard use.