![]() Want to know what phase means? Check this tutorial for a more detailed explanation. And then you ‘phase reverse’ the second signal wire. Instead of transporting the audio signal through 1 signal wire and an earth wire from A to B, you let it run through 2 signal wires and an earth wire. So a trick has been devised to solve this problem. We already saw that an audio cable serves as an antenna and picks up all kinds of noise and interference. Again, we leave out the physics, but that earth wire is needed to transport the audio signal properly. As we saw, unbalanced cables transport the audio through a signal wire and an ‘earth wire’. Because in most cases, you can tell by looking at the connector that is used whether a cable is balanced or unbalanced.Īnd now for the audio enthusiasts some more technical background information. Then you probably won’t hear anything at all! □ Below we will discuss stereo vs. What really doesn’t work is inserting a stereo cable into a balanced input. You really need a balanced input, output and cable to make a connection balanced. However, in both cases the connection is unbalanced, so you may hear some noise. Unbalanced cable in a balanced input or vice versa? That is why most professional audio equipment has balanced inputs and outputs. This makes it a better option in many cases, especially if the signal that runs through the cable is very low, as is the case with microphones. If you want to know more about this ‘technical trick’: we will discuss this later on in this tutorial.Ī balanced cable is therefore virtually free of interference, noise and humming. In a balanced cable, a technical trick is applied to eliminate the interference that is picked up by the cable. An unbalanced cable longer than 3 or 4 meters is therefore not recommended. The longer the cable, the more interference is picked up along the way. The earth wire / protective shield blocks this interference to some extent, but that never works 100%. And you can hear this, for example as a hum in your audio recording. Unfortunately, this cable also acts as an antenna that picks up electromagnetic interference. I won’t go into the physics behind it, but that earth wire is needed to transport the audio signal through the cable and at the same time it serves as a protective shield. Unbalanced cables transport the audio signal in the simplest way possible: Through a signal wire and an earth wire.
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