Jansen DIN-LI-SUM-B and DIN-LI-SUM-U (ISO-MAX)
Both modules are designed to take a stereo L-R signal (either balanced or unbalanced), sum it into mono, and output the signal through one of Jensen's world-famous audio transformers, which provides complete galvanic isolation and immunity from hum, buzz and noise caused by ground loops, while maintaining the highest audio quality demanded by the installer's customer. These modules can be easily installed by A/V system contractors into rack or wall mountable 35mm DIN Rail systems . Both have gold plated, screw terminal, pluggable connectors for ease of installation and service. A schematic diagram showing the actual internal circuitry is printed on the side of each module; no need to hunt for manuals in the middle of a wiring job.