On Sun, 03 Dec 2006 12:42:16 +0000, Eeyore
wrote:



Don Pearce wrote:

On Tue, 21 Nov 2006 19:13:11 +0000, Eeyore
wrote:

If your drivers are up to the task, just use a first order crossover ( 6dB /
octave).

By its very nature it can't screw up. It will always give constant power and
pressure and eliminate any phase 'nasties'.

No, a singe order crossover can't be linear phase - you need at least
second order to achieve that.

Nonsense.

The vector sum of a first order crossover is flat in both amplitude and phase.

Graham

Show me the maths. And then explain, if it is flat in amplitude, how
does it work as a crossover? Then you can go on to explain what is
happening to the phase around crossover as opposed to the passband. Do
it in terms of group delay please - that is an easier visualization
for linear phase systems.

I will do the same - lets see who blinks first, shall we?

d

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Pearce Consulting
http://www.pearce.uk.com