Hugh Robjohns has been Sound On Sound's Technical Editor since 1997. Prior to that he worked in a variety of (mostly) sound-related roles in BBC Television, ending up as a Sound Operations Lecturer at the BBC's technical training centre.
He continues to provide audio consultancy and bespoke broadcast audio training services all over the world, lectures at professional and public conventions, and occasionally records and masters acoustic and classical music too!
This neat little unit can serve either as a four-into-one passive stereo line mixer, or as a one-into-four stereo line splitter, just by using the appropriate input and output connectors. However, it goes rather further than that...
Why does everyone, pros and all, say that the snare bottom mic is ‘out of phase’, and that its polarity must be reversed? Isn’t it the top mic that should be reversed?