Sony MDR-EX1000 Product Information page 10

. For a snug fit
Actualizing a superior fit with a large caliber driver unit:
Closed-type vertical in-the-ear method
In using a 16 mm diameter large caliber driver unit, a closed-type vertical in-the-ear method wherein
the driver unit is positioned perpendicularly to the external ear canal was incorporated. And, in order
to absolutely minimize the thickness of the housing, which impacts the fit of the headphones, a high
strength magnesium alloy for the housing was used. This let us shave over 30% off the thickness
compared to housings that use common resin material.
10
(GB)