8
SPEAKER PLACEMENT
The following guidelines will help in providing optimal aiming and placement
to best match the perceived location of the sound to the picture on the
screen.
8.1 Vertical
Placement
The mid/high horn should be mounted approx. 2/3 of the total screen height
when the screen is masked for the tallest film format. For optimum HF
transmission the MF/HF horn should be placed 100mm (4") from the
perforated screen.
8.2 Horizontal
Spacing
For a 3-channel (L,C,R) system, L and R speaker channels should be
placed equidistant from centre of the screen image area, so that they are
just inside the screen area when screen is masked for the widest format
(typically 2.35:1). Acoustically transparent side masking should be used to
prevent blocking of HF when side masking is moved in for "flat" picture
format. For 5-channel systems, Left-extra and Right-extra should be placed
equidistant between Left and Centre, and Right and Centre.
Martin Audio – CINEMA SERIES
E
NGLISH
7
2/3 of screen height
Perforated Screen
C
RC
LC
L
R
1.85:1
2.35:1
Platform Height
2/3 of Screen height
minus
(Screen 5) 1750mm
(Screen 4) 1300mm
(Screen 2) 907mm
Rear wall behind screen
C
RC
LC
L
R
1.85:1
2.35:1
All material © 2007. Martin Audio Ltd. Subject to change without notice.
