The completely reversible Shure A95UF Impedance Matching Transformer matches low-impedance microphones to high-impedance inputs or high-impedance microphones to low-impedance inputs. The transformer permits use of very long microphone cables with either low-impedance or high-impedance microphones. The only requirement is to limit the cable to 4.6m (15') between the high-impedance end of the transformer and the low-impedance microphone or microphone input.
The Shure A95UF transformer prevents high-frequency loss, level loss, and objectionable pickup of noise or hum. Shure furnishes the A95UF with a 3-socket professional audio connector on the low-impedance end, and both a standard 1/4" phone plug and phone jack adapter for the high impedance end.
Order several and have them in your kit for dealing with unusual impedance situations.