Electrovoice EVM10DLX 10-Inch Single 8 Ohm Replacement Subwoofer (Discontinued by Manufacturer) Paper cone and dust cap Treated cloth surround Cast aluminum speaker basket2.5" Aluminum voice coil 8.6 kg. Barium Ferrite magnet structure Frequency response: 100-2,000 Hz Sensitivity: 97 dB Maximum Calculated SPL (dB SPL): 121.8Max Calculated Acoustic Power (Ac. Watts): 12.6 Subwoofer Grille No Re-Cone Kit Available No Recommended Enclosure Specifications Recommended Enclosure Type Ported / Vented Cutout Diameter 9" Shallow Mount Installation No