The illustrations below show the
connection between balanced and un-balanced outputs on different connector types
(XLR / Cannon, 14", phono/RCA/cinch) to balanced inputs on XLR and 1/4"
connectors. We are assuming that XLR pin 2 is positive and that the tip of the
1/4" plug is also positive. Check that your devices are not wired
differently. 1/4" three-contact connectors are often referred to as TRS (Tip-Ring-Sleeve), as opposed to two-contact TS (Tip-Sleeve) connectors.
Balanced to balanced
We simply connect pin to pin
In case of hum when connecting balanced outputs to balanced inputs, it is common practice to lift (disconnect) the shield (ground) at the input connector.
Balanced XLR to balanced XLR
Balanced XLR to balanced 1/4"
balanced 1/4" to balanced 1/4"
Balanced 1/4" to balanced XLR
Unbalanced to balanced
In general, to connect an unbalanced source to a balanced input, two of the
cable conductors are joined (negative/cold and sleeve).
Unbalanced XLR to balanced XLR
Unbalanced XLR to balanced 1/4"
Unbalanced 1/4" to balanced XLR
Unbalanced 1/4" to balanced 1/4"
RCA to balanced XLR
RCA to balanced 1/4"