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Original Message
RE: Compression drivers
Posted by sideliner on July 8, 2017 at 18:25:47:
Atlas PD-5VH - throat dia = 0.707" -- used in the Klipschorn
Altec 902 / 909 - throat dia = 7/8"
(this is only the case with the old Altec drivers from the 80's and not the current GPA drivers that have a 1" throat)