Sign up for ProSoundWeb newsletters
Subscribe today!

Tech Tip Of The Day: To Shield Or Not?
Why aren't all cables shielded, including loudspeaker and power cables?
+- Print Email Share RSS RSS

Provided by Sweetwater.

Q:I’ve noticed that mic, guitar, and line signal wires are shielded, but loudspeaker and power cables aren’t? Is there a reason to shield some and not others?

It seems like it would make sense to at least shield the power cables, especially given all the problems that power cables can cause.

A: An interesting observation!

Line, mic, and guitar cables are shielded because those signals are greatly amplified before they are converted back to sound waves. Any noise that those cables pick up along the way would also be similarly amplified and become audible.

Similarly, AC power is never amplified, and loudspeaker-level signals are already amplified before they pass through loudspeaker cables. So, while you’re correct in your observation, the cables which are shielded are those which are susceptible to interference and noise.

For more tech tips go to

Source: Sweetwater

With Live Sound, You Can Make Anyone Sound Good

A free subscription to Live Sound International is your key to successful sound management on any scale — from a single microphone to a stadium concert. Written by professionals for professionals, each issue delivers essential information on the latest products specs, technologies, practices and theory.
Whether you’re a house monitor engineer, technical director, system technician, sound company owner, installer or consultant, Live Sound International is the best source to keep you tuned in to the latest pro audio world. Subscribe today…it’s FREE!!

Commenting is not available in this weblog entry.

Audio Central