The Roland RMC-B20-HIZ is a professional microphone cable from the Black Series, designed to connect high-impedance microphones with a 1/4-inch output jack to standard low-impedance microphone inputs on mixers, amplifiers, or audio interfaces. This specific cable serves as an impedance-matching and signal-conversion solution, allowing instruments like certain vintage or specialized microphones, as well as some acoustic pickups, to interface correctly with modern professional audio equipment that typically expects a low-impedance, balanced XLR signal.

The cable is constructed with a durable, flexible outer jacket that resists kinking and tangling, making it suitable for stage, studio, and portable use. It features a male XLR connector on one end and a 1/4-inch TS (Tip-Sleeve) phone plug on the other. The internal wiring incorporates an impedance-matching transformer housed within the XLR connector's body. This transformer effectively steps down the high-impedance, unbalanced signal from the 1/4-inch source to a balanced, low-impedance signal compatible with XLR microphone inputs, helping to preserve signal quality, reduce noise pickup over long runs, and prevent level mismatches.

As part of Roland's Black Series, the cable is built for reliability and rugged performance in demanding environments. The connectors feature robust metal shells and strain relief to withstand frequent plugging and unplugging. This specialized cable provides a simple, plug-and-play method for integrating high-impedance audio sources into a professional signal chain without requiring external direct boxes or additional adapters, offering a convenient and effective connectivity solution for musicians and audio engineers.