Why do only US makers focus on time coherency?


Just curious...it seems that the handful of truly time and phasecorrect speaker makers...Vandersteen,Thiel,Meadowlark,Green Mtn,Thiel,etc,,,are all US based companies...why is this? Are there any Euro/Brit speakers that come to mind? (Besides Quad stats?)
128x128phasecorrect

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