The Iso•Max CI-2MINI is a passive two channel audio ground isolator designed to eliminate hum and buzz caused by ground loops in the most demanding audio systems. Designed specifically to eliminate the hum and buzz that is often encountered when connecting the audio output from a consumer device to another. This stereo isolator features standard 3.5 mm input and output connectors for easy interfacing with headphone and ear-bud outputs. Inside are two world-class Jensen audio transformers that deliver a ruler flat response from 10 Hz to 40 kHz and are able to withstand high output signals to +19 dBu without distortion. Rugged flange-mount design discretely mounts under a shelf or stereo stand. Passive design, does not require power.