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Old 14th August 2019
  #12
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Quote:
Originally Posted by Jamie Mac View Post
The triangle is formed perpendicular to the front face of the speaker's cabinet. Hence if you rotate the cabinet, you don't have an equilateral triangle anymore.
I think that what he means is that while keeping the distance between speakers cabinets and engineer an equilateral triangle, you can slightly toe in or out a speaker.

For a while it was quite common to do this especially in Mastering studios with a specific brand of free standing speakers that were common in the 90s' up to mid 00s' that had quite harsh tweeters.

The engineers would toe out the speakers a bit to soften the tweeters, their slight off-axis response being a bit smoother. They could work longer hours that way.

In short, instead of physically moving the speakers cabinets on the ideal "circle" and changing the equilateral setup to an isosceles one which degrades the imaging a lot more, they simply slightly rotated in place the speakers cabinet.