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In Reply to: RE: Tannoys are NOT time coherent and you forgot some that are posted by morricab on September 06, 2014 at 09:11:51
Read this..
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Yes, the drivers are in the right place to be time coherent BUT the crossover is not right. Look at these measurements from STereophile:
http://www.stereophile.com/content/tannoy-churchill-loudspeaker-measurements-part-2
http://www.stereophile.com/content/tannoy-dimension-td12-loudspeaker-measurements
http://www.troelsgravesen.dk/tannoyMG15.htm
The blurb from Tannoy is misleading and if they are implying time coherence they are lying. Stereophile's (and other's) measurements are clear indication that the two drivers are not coherent.
I guess we really don't know what we've got until it's been measured!
BTW, I seem to remember reading that a fair number of manufacturers make the claim that their speakers are "time-aligned" and/or "phase-coherent" when they are not truly so. I wish I could remember where I read this, but right now the memory escapes me...
Well Dynaudio claimed phase accuracy in their designs because the used 1st order xovers supposedly (don't know about now) but they were never time aligned because the baffle was flat and not sloped to compensate the distance to the listeners ears.
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