Electrovoice EVM12DLX Super Power 12IN. Woofer Power Rating, as per EIA-RS426A (Watts): 300 Sensitivity, 1w@1m (db SPL): 100.0 Nominal Cone Diameter (in.): 12 Nominal Coil Diameter (in.): 2.5 (mm): 63.5 Nominal Impedance (ohms): 8