Balanced audio
Videos
Balanced audio is a method of interconnecting audio equipment using balanced interfaces. This type of connection is very important in sound recording and production because it allows the use of long c
Three-pin XLR connectors, female on left and male on right
Three-pin XLR plus 6.35 mm TRS phone hybrid jack.
DI unit
Videos
A DI unit is an electronic device typically used in recording studios and in sound reinforcement systems to connect a high output impedance unbalanced output signal to a low-impedance, microphone leve
Balanced audio
…interface commonly seen on consumer equipment is unbalanced. Balanced and unbalanced circuits can be interfaced by the use of a balun, often through a DI unit (also called a "DI box" or "direct box"). As a last resort a balanced audio line can be fed into an unbalanced input and vice versa as long as the…
A professional passive DI box. It is passive because it does not need external power to operate. DI boxes which require a power source (batteries or phantom power) are called active DI boxes.
A vintage Wolfbox custom-made by audio engineer Ed Wolfrum in the 1960s.
A passive DI with "throughput" in addition to XLR output
An active stereo DI with pass-through in mono mode only