25cm (10") Ultra Excursion Subwoofer 600W RMS 1200W MAX Impedancy: Dual 4 Ohm Frequency response: 24Hz - 500Hz 110oz. Strontium Magnet Efficiency: 90dB @ 1w/1m Airflow Basket Non Pressed Paper Cone 75mm 4-way ASV Voice Coil Depth: 151mm