Parts & Accessories Registered Subwoofer used for two months From Pioneer company with its invoice And all its accessories and guaranteed operation Upgraded to another brand Specifications Active Size 20 cm (8") Maximum music power 170 W RMS 50 W Frequency response Dynamic: 20 Hz to 200 Hz Dynamic: 40 Hz to 160 Hz Normal: 40 Hz to 200 Hz Sensitivity (in car 1W) Deep: 95 dB Dynamic: 100 dB Normal: 98 dB Resistance 1Ω Single