Posted by Wayne Parham [ 192.35.232.241 ] on October 03, 2006 at 09:53:22:
In Reply to: Time Alignment posted by Spinjack on October 03, 2006 at 09:10:15:
The sound eminates from the diaphragm, so that's the reference point, not the voice coil or magnet. Of course, the diaphragm isn't usually flat unless the speaker is planar, and that's one of the reasons why perfect alignment isn't possible. Another is reactive elements in the system, such as inductors, capacitors, mass and suspension stiffness. Yet another is chaotic elements in the system, like cone flex, electro-magnetic and suspension non-linearities. You're shooting for keeping sound sources within 1/4λ at frequencies where there is overlap between sound sources. That's the goal, because that's what keeps summing true and makes the speaker sound natural.
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