Audio Technica CP8201 Lo-Z to Hi-Z Transformer
This Lo-Z to Hi-Z Transformer matches low-impedance microphones to high-impedance electronic inputs while maintaining high frequency response. It also permits use of long microphone cables, still reducing noise pickup.

Hosa MIT-435 XLR Female Lo-Z to 1/4-inch TS Hi-Z Transformer
The Hosa MIT-435 XLR Female Lo-Z to 1/4-inch TS Hi-Z Transformer is designed to match 200R output impedance to 50K input impedance.

Shure A95U Transformer
This reversible transformer matches low or high-impedance microphones to high or low-impedance inputs. The transformer permits use of very long microphone cables with either low or high-impedance microphones.

Shure A95UF Transformer
This reversible transformer matches low- or high-impedance microphones to high- or low-impedance inputs. The transformer permits use of very long microphone cables with either low- or high-impedance microphones. However, when connecting a high-impedance microphone, limit the cable length between the microphone and the transformer to 4.6 m (15 ft). The cable from the transformer to the low-impedance input can be any desired length.