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Unbalanced Sources
When using unbalanced sources, there are more possibilities to introduce ground loops into a
system. The LSR4328P and LSR4326P offer several ways to help alleviate potential problems
with unbalanced equipment.
While there are only HOT and GROUND/SHIELD connections from unbalanced sources, it is
recommended that high quality twisted pair cable be used. Diagram B shows an unbalanced
source connected to the balanced XLR input of the LSR monitor using twisted pair cable.
Note that the shield is connected to the GROUND/SHIELD connector at the LSR input, but
not at the source. This reduces the likelihood of introducing a ground loop into the system.
When using unbalanced signals with an LSR4328P or LSR4326P, we recommend using 1/4″
Tip/Ring/Sleeve connections. As shown in Diagram C, when using the 1/4″ Tip/Ring/Sleeve
or XLR connection, the GROUND should be tied to the source -- not the sleeve -- of the LSR
input for optimum performance.
Appendix C: Wiring Requirements