Techniques for interconnecting balanced and unbalanced equipment in audio systems seems to be a murky topic for many users, technicians, and system designers. It is the subject of numerous calls to our applications engineers. Confusion, and even controversy, is further fueled by some published “guides” whose engineering basis is dubious, at best. This paper briefly explains the hardware, some underlying engineering theory, and includes wiring diagrams for interfaces that solve many typical system problems.

The author of this paper can be contacted at whitlock@jensen-transformers.com