Roland VS-CDRII User Manual download pdf (Page 7)

It’s helpful to note that balanced vs. unbalanced is usually, but not always,

related to impedance. For example, XLR cables are almost always low

impedance, but quarter-inch cables can be either balanced or unbalanced and

either low or high impedance.

Also, if you are connecting a balanced output to an unbalanced input over a

long cable run (10 to 15 feet or more), it’s a good idea to use a balanced cable

for the majority of the cable run and a direct box or matching transformer

right before you connect to the unbalanced input. That way you can take

advantage of the higher noise rejection capability of the balanced cable.

Balanced Line

An audio circuit consisting of three wires: High (+), Low (-), and a shield

connected to Ground. The High and Low wires are an equal potential

difference from the Ground. This is a common design used to help prevent

noise and interference for lengthy cable runs.

Unbalanced Line

An audio circuit consisting of two wires: High (+) and Low (-). The High wire

carries the signal while the Low wire is connected to Ground. The ground

conductor serves as a shield around the other conductor. Because the High

and Low wires are not at an equal potential difference to the Ground, they are

considered “unbalanced.”

6 The Basics of Modern Recording

Balanced and Unbalanced (continued)

Unbalanced

RCA

Unbalanced 1/4-inch

Balanced 1/4-inch

tip, ring, sleeve (TRS)

Balanced

XLR

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Roland VS-CDRII User Manual Page 7