MAX AUDIO :Throat diameter: 44.00MM 1.73in.Rated impedance: 4 ohmsMinimum impedance: 4 ohms @ 3.5 kHzD.C. Resistance: 4 ohmsPower capacity *: 52 w AES above 0.8 kHz62 w AES above 1.5 kHzProgram power: 92 w above 0.8 kHz112 w above 1.5 kHzSensitivity **: 103dB 1 w @ 1mFrequency range: 2KHZ – 20 kHzVoice coil diameter: 38.6 mm. 1.5 in.Magnet Size : 38*7Magnet: Neodymium