Studio Guitar Interface, Replacement part - RX only (must be used with TX).
The Radial SGI-RX Receiver Module
When in use, the amplifier is connected at the receive end using the SGI RX. This module is completely passive, thereby not requiring local power. The transformer receives the signal and is wired 'in reverse' to counteract any ringing that may be induced at the input side. It also eliminates ground loops, a common problem when connecting equipment using different electrical circuits.