The Jensen JT-MB-C is a microphone bridging transformer with dual faraday shields for high isolation. This transformer is designed to be driven from a 150Ω microphone source and loaded by the typical 1kΩ input impedance of microphone preamplifiers. It can be used with balanced or unbalanced sources and/or loads since both primary and secondary are fully balanced. A 30 dB magnetic shield package is standard.