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Multi-Way Conventional loudspeakers with crossovers

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Old 29th September 2012, 04:59 PM   #11
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Location: Avalon Island
Something to keep in mind.
Reversing the polarity of one driver does effect the sound.
While the phase will be correct at the cross over point, the phase will be 180 degrees off at all the other frequencies.
Some people are more sensitive to this than others.
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Old 29th September 2012, 09:11 PM   #12
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The whole thing is complicated by acoustic offset.
The exact L-R characteristic assumes that the acoustic centers are aligned. If the driver roll off is at least an octave either side of the crossover then the driver characteristics have a minimal effect upon the result, but in may cases for instance you can get close to a quadrature phase shift due to acoustic offset.
If this happens either in or out of phase connection gives the same amplitude although group delay is different.
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Old 29th September 2012, 10:46 PM   #13
Dissi is offline Dissi  Switzerland
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In an average 2-way speaker the signal of the tweeter arrives about 0.1 ms before the woofer signal. If you want to insert an electronic delay, that makes only sense in the tweeter path. The delay changes the phase at the crossover frequency and you will not necessarily have to invert one path. A delay of half a wave length has the same effect.
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