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used if required. If unbal-

anced audio sources are  used,

it is preferable to use  an ap-

propriate audio transformer (or

other unbalanced-to-balanced

“converter”) to provide a bal-

anced input. If this is not pos-

sible, then it is recommended

that the negative  terminal and

shield terminal be connected

to one another with a jumper

wire.

This style of plug
automatically connects
the negative terminal to
shield when inserted in
the jack.

NOTE for above abbreviations:   TRS- tip, ring, sleeve (3 conductors)

      TS- tip, sleeve (2 conductors)

All audio connections should be balanced to ensure the best performance. Unbalanced signals may be used if necessary; follow

the wiring guidelines below for recommended unbalanced termination.

The audio input jacks are female 3-pin XLR /TRS “combo” connectors. They will accept male XLR plugs or TRS (tip-ring-sleeve)

1/4-inch phone plugs. The audio output jacks are male 3-pin XLR connectors.