Wayne Parham Messages: 18738 Registered: January 2001
Illuminati (33rd Degree)
Audio is AC, so positive and negative terms don't apply. However, sometimes (often) the connections are still labeled that way, and it generally means positive voltage on a positive terminal will cause positive pressure, e.g. forward diaphragm motion at the speaker.
One key factor is whether the interface is balanced or unbalanced; Shielding is important for unbalanced connections, and most commercial audio preamp connections are unbalanced. For speaker wires, the main thing is the conductor size. In all cases, you want a good quality connector because the contact is a potential trouble spot.
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