(3 inputs/1 output), for connecting 3 microphones to e.g. one microphone input of a mixer.
on the FGA-102, FGA-202, LC-31, MC-31 and LSP-102:
"Every musician or sound engineer should have these little helpers in their toolbox. They impress by their unobtrusiveness. Both the robust metal housing and the functionality of these transformers allow to solve many problems on stage or in the studio at a reasonable price."