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Old PDF Files explaining Premium Hifi
I just find this Old PDF Files.
It is interesting that according to this Old PDF files,
when it first came out in 2007,
the Premium HiFi system as we know right now was
only offered as BMW "INDIVIDUAL" High End Audio System.
The PDF document also have pictures of the Coaxial Speaker that used in the rear doors and the center channel. Which they count as separate midrange and tweeter.
Based on this pictures, it seemed that the rear deck (behind head rest) speakers do NOT used the coaxial but use the separately package Midrange and Tweeter,
just like the Front Door one.
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