On Fri, 06 Apr 2018 10:44:43 +0100, "Dave Plowman (News)"
wrote:

In article ,
Trevor Wilson wrote:
On 6/04/2018 8:25 AM, Dave Plowman (News) wrote:
A mid range unit - say about 4" - in a suitable sealed box. Remind me of
the difference between mounting it on the rear of the baffle, front, or
recessed flush to it? I've seen all done on commercial designs.


**Flush mount mitigates diffraction effects.

How would diffraction manifest itself? Ie, the audible effect?

Tiny changes in frequency response, particularly off-axis if done
right. Symmetry is the enemy. You ideally want every diffracting
surface at a different distance from the cone centre. Off-centre in a
rectangular baffle is pretty good.

d

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