That's bad. It’s surprising how many home stereos — and even project studios — have their monitors wired out of phase. I said (and I know I could very possibly be wrong) that it doesn't matter if you mix up the + and - wires, as long as every speaker is wired the same. I used to run my subs out of phase which often made them sound much more part of the system instead of a big speaker sitting in the boot. Let's take a sine wave ( f(x)= sin(x)) A cosine wave can be represented as sin( pi/2 - x ) Now let's plot both the functions in the same graph: The cosine wave is the sine wave moved 90 degrees to the left. If so, do you really know what that means? In some circumstances, it may not even be apparent without careful listening. hopefully, they've both moving out. If two tracks are only slightly out of phase, for example, a polarity flip alone will leave you stuck choosing between the lesser of two evils. This is called constructive interference. If the sub and mains are out of phase, the woofer cones on the main speakers will move backward while the subwoofer cone moves forward, and vice-versa. if not, you'll have to resolder one or both of them. For starters, zoom in on the waveforms in your DAW and compare the peaks and valleys of different tracks. You can wire positive to the negative terminals on speakers … Phase cancellation can also occur by simply wiring speakers incorrectly, inadvertently reversing the polarity of one channel. Not necessarily. Anytime two identical signals are mixed together with inverse polarity, the signals cancel out. Each speaker has a positive (+) and negative (-)terminal. That's good. The result is a signal that is twice the amplitude of each individual signal. and while this might not be the best way, to test for their phase, you could simply turn up your power amp to near stupid loud levels, and gently thump on your strings. Have you ever heard people say their speakers or subwoofers are in phase or out of phase? For this reason, it’s worth exploring other options. THe front soundstage via the two front speakers wont be centred correctly. They'll cancel each other's output. In this case, one wave is positive while the other is negative, and vice versa. You can also access more phase tests here: Online Stereo Polarity (Phase) Sound Test Note that out of phase wiring cannot damage either the speakers or the amplifier. watch for both speakers to move at once in the same direction. In phase must be correct and out of phase must be wrong… Right? Out of phase speakers lack bass and audio tends to lack body when played out of phase. I had a discussion with a colleague today, and we had a disagreement about wiring speakers out of phase. The positive phase of both waves are aligned and the negative phase of both waves are aligned.