for 8 ohm speakers, 70 volt/25 volt dual voltage, power rating: 10 watts, mounting centers - 2 7/16", full range frequency response: ±1.2dB 50-15000 Hz, insertion loss: .6dB, primary taps .63, 1.25, 2.5, 5 & 10W, secondary impedance: 8 ohms, primary & secondary terminations: 6" color colded leads