Reversing polarity with multiple speakers can cause more noticeable effects. If both speakers are wired the same, whether in the correct polarity or reversed polarity, there will be virtually no effect. ... Line arrays of full-range speakers, such as those used in live sound reinforcement should all be wired the same way.

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 if you connect speakers the wrong way?

Reversing speaker wire polarity is a common audio error. ... This action is known as making the speaker "out of phase," and results in audio oddities. Although this is not dangerous to a speaker or amplifier, proper power delivery and speaker response is not possible with reversed speaker wires.