Unbalanced output into balanced input

Unbalanced output into balanced input

Date Updated: October 13, 2017 FAQ #3887
Question:
I need to connect the unbalanced output of a consumer CD player (RCA female jack) into the balanced input of the Shure SCM800. What is the proper wiring?
Answer:


1) Set the SCM800 input to LINE.
2) Obtain a cable with a twisted pair of inner conductors (A and B) and a shield.
3) Fabricate and connect the cable as follows:
RCA male tip > to inner conductor A > to SCM800 input terminal "positive" (same as XLR male pin 2)
RCA male sleeve > to inner conductor B >to SCM800 input terminal "negative" (same as XLR male pin 3)
RCA male sleeve > to cable shield >to SCM800 input terminal "ground" (same as XLR male pin 1)
Note: If audible hum is encountered, disconnect the cable shield at the SCM800 input terminal "ground" (same as XLR pin 1)