Phil Leigh;169689 Wrote: 
> As I understand it, my crossovers (indeed, all analogue crossovers)
> introduce phase shift but they are designed to have 3 particular phase
> shifts (mine is a 3-way system) so that phase-frequency coherency is
> maintained at the output of the x-overs into the amps, through the amps
> and to the speaker drivers - in other words the whole thing is a tuned
> system designed to preserve coherent phase. Effectively what you get
> with an active system like this (where the speakers and line-level
> crossovers are designed as a system) is like the DEQX but not
> "tunable"...hope that made any kind of sense?

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.


-- 
opaqueice
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