Loudspeaker Phase and Frequency Test's
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If you play a mono source with the speakers in phase, and if you stand in the sweet spot,
you should hear the sound source as right in the middle of the 2 speakers. If you have the speakers out of phase this phantom center image will not be there. Btw, you don't really need a mono signal to test this, as long as the stereo mix has some center channel information. If the speakers are out of phase you should not hear anything in the center. |
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If you play a mono source with the speakers in phase, and if you stand in the sweet spot,
you should hear the sound source as right in the middle of the 2 speakers.
If you have the speakers out of phase this phantom center image will not be there.
Btw, you don't really need a mono signal to test this, as long as the stereo mix has some
center channel information. If the speakers are out of phase you should not hear anything in the center.
If in doubt, reverse the polarity of the wiring to one speaker. You can't go 100% by simply looking at the wiring, because speakers have been known to be wired wrong internally. And for those of you who don't understand, with a mono signal and in phase speakers both speakers will do the same thing. In other words, when one speaker goes in, so does the other. When out of phase, when one speaker goes in, the other goes out, so rather than working together, they are opposing each other. I often use a battery to test phase. If you take a small 1.5v battery (any type will do), and hook it up the a speaker, the speaker will move one way and stop. This is because you have hooked dc up to it. The speaker will either go in or out depending on which way you hook up the battery, and stay that way until you remove the battery. Now if you hook up the other speaker the same way, you need to make sure the speaker moves the same way when the battery is hooked up to it in the same manner. |
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