Converts the 25v or 70v down to 8 ohms and eliminates power loss caused long distance between amplifier and speaker . Dual voltage 70 volt and 25 volt. For 8 ohm speakers. Mounting centers: 2-7/16". Full range frequency response plus / minus 1.2 db 50-15000Hz. Insertion loss: 6 db. Primary taps: .63, 1.25, 2.5, 5, 10W. Secondary impedance: 8 ohms. Primary and secondary terminations: 6" color coded leads. Power rating: 10 watts.