opaqueice;169701 Wrote: > Sorry, I'm not getting it. It sounds like what you're saying is that > the crossovers introduce a different phase shift for each of the three > outputs. So that would mean that the woofer has one phase, mid has > another, and tweeter has a third (and thus there are two numbers - the > differences - that matter, since we don't care about absolute phase). > That sounds right to me, at least to a good approximation (the phase > shifts will depend a little bit on frequency even within each band, but > maybe not much). So each driver has a different relative phase, but > within each band the phase would be more or less untouched. Is that > what you're saying? Sorry to be so slow. > > On the other hand I believe the DEQX is capable of driving all its > outputs with the same phase. This is certainly possible in principle - > all you have to do is delay each signal by the appropriate amount to > cancel the relative phase shifts, and it seems that would be easy to do > digitally.
Nearly - what I'm saying is that by setting the phase shift of each band (treble/mid/bass) to compensate for/counteract the corresponding natural shift in the speaker driver mounted in its enclosure, what comes out of the speaker as whole is phase-coherent (within limits of course!). It's very hard (impossible?) to do this accurate phase manipulation with conventional passives, but easier with line level analogue filters and much easier with digital. -- Phil Leigh ------------------------------------------------------------------------ Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=31590 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
