3 Answers. The reason for keeping the polarity of speakers the same in an audio system is so that you don't end up with a phase difference between channels if different channels are connected reversed. If you have a single speaker the signal is AC so it doesn't really matter which way around it is connected.

Does speaker polarity really matter?

It doesn't really matter which polarity the speakers are connected with, as long as they are all connected with the same polarity. For each channel, the easiest thing is of course to connect the red terminal on the amp or receiver or whatever to the red terminal on the corresponding speaker, and black to black.

What happens when you reverse polarity on speakers?

What Happens When a Speaker's Polarity is Inverted? When the wires from the amplifier to the speaker are crossed, the speaker polarity will be inverted. This means that the speaker will move inward when it is supposed to move outward, and outward when it is supposed to move inward.