2" - Throat Parameter: .875" / 22 mm - Nominal Impedance: 8 Ohms - Minimum Impedance: 5.1 Ohms - DC Resistance: 4.7 Ohms - Power Capacity 1000 Hz to 20,000 Hz: 280 W peak 140 W program 70 W continuous using pink noise band limited from 1000 Hz to 20 kHz (AES 2-1984) - Power Capacity 500 Hz to 20,000 Hz: 240 W peak 120 W program 60 W continuous using pink noise band limited from 500 Hz to 20 kHz - Sensitivity: 111 dB SPL 1 Watt at 1 meter On-axis on 90º H x 45º V horn - Nominal Efficiency: 30% - Frequency Response: 500 Hz to 20,000 Hz - Recommended Crossover: 1200 Hz at 12 dB / Octave - Lowest Recommended Crossover: 500 Hz at 12 dB / Octave - Diaphragm: Commercially pure titanium - Voice Coil Diameter: 2.0" / 50.8 mm - Voice Coil Material: Edge-wound copper-clad aluminum ribbon with a high temp composite bobbin - Flux Density: 17,500 gauss (1.75T)