This pair of modules converts a balanced signal on XLR input to an unbalanced signal on XH 2.54mm output. A second input is also available in RCA format, with a switch to simply select the active input. A differential amplifier and an operational amplifier efficiently process the input signals in order to limit the generated noise. The internal resistance of the SSM2141 is laser adjusted to a precision tolerance of 0.0001%. Its performance in terms of noise, distortion and interference is close to professional level.