Passive stereo line isolator for eliminating signal interference and ground-loop problems in analog audio systems. The unit provides galvanic isolation between its stereo RCA input and output using two audio transformers. It has a rugged black metal housing and is suitable for installation, mobile applications, DJs, and entertainers. Frequency response is 20–30,000 Hz, with an S/N ratio above 95 dB and THD below 0.001% at 1 kHz.