Scorpion SP-12825 8 Ohm Low Frequency Driver Features: - Impedance: 8 Ohms - Power capacity: 800 W Peak, 400 W Program, 200 W Continuous - Sensitivity: 98.7 dB / 1 W 1 m - Usable freq. range: 60 Hz ~ 4 kHz - Cone: Kevlar impregnated cellulose - Voice coil diameter: 2.5 inch / 63.5 mm - Voice coil material: Aluminum ribbon wire, Kapton former, Nomex stiffener, Solderless diffusion welded OFHC copper leads