[sdiy] group delay (of filters) and listening

[Czech Martin]

I used to make experiments with treble and bass speakers, that
were mounted in certain distance. This causes nonlinear phase.
Up to 70cm difference or so it was difficult to hear any 
diffreence or problem.


Contrary to the headphone experiment the room reflexions come into play.
Only few sources show the influence of an actuall room on speaker
performance, though it is easy to measure.

Of course, the flat characteristics you can see in the anechoic room
will be totally distorted, peaks of 20dB are nothinbg unusuall.
This would not sell.

There are only few web sites which show actuall room performance.

Considering this, the question of phase linearity of speakers gets
even more questionable.


m.c.