Sony MHC-GT4D Operating Instructions Manual page 18

 To install the speaker units
vertically
Attaching the speaker
units onto the mounting
rod of the subwoofer (Line
Array Style)
Note
Remove USB device from the subwoofer
beforehand to prevent them from being
damaged by accidentally dropping the
speaker units.
1
Pull up the mounting rod of the
subwoofer.
 Unlock the clip, then press the
release button and pull up the
rod until the release button clicks
into place.
18 GB
Clip
Release button
 Lock the clip.
Proceed to step 2 if you want to
install the speaker units at this
height (approx. 1.3 m).
We recomment you to proceed
to step 1- to install the speaker
units at maximum height
(approx. 1.6 m).
 Unlock the stopper, then press
the release button and pull up
the rod until the release button
clicks into place.
Stopper
 Lock the stopper.
Notes

Adjust the rod before attaching the
speaker units.

Do not adjust the rod with the
speaker units installed as the speaker
units may drop.
Release
button