Dolby Laboratories SDU4 - Manual (Page 9)

2-2
Surround Loudspeakers
The surround loudspeakers are used to distribute a single channel of sound in
a diffuse field behind the viewer. The number of loudspeakers needed,
therefore, depends upon the size of the area to be covered. In smaller rooms,
such as those used for video production and home surround installations, two
loudspeakers generally provide sufficient coverage.
Equalization
The monitor system used with the SDU4 should have its electro-acoustical
frequency response adjusted to conform with international standards for wide-
range audio monitoring. This standardized equalization is encouraged, as it
allows program material to be interchanged between various monitoring
rooms and, ultimately, the viewer’s home, without apparent or objectionable
shifts in program equalization.
2.2 Mains Fuse and Voltage Selection
2.2.1 230V-Only SDU4
FUSE
CARRIER
OPEN THE
DOOR
ACTIVE
FUSE
OPEN THE
DOOR
METAL CLIP INSTALLED
ON
UNUSED SIDE OF
CARRIER
TOP
INSTALL
FUSE
Figure 2.2 Fuse compartment, 230V unit
Open the fuse compartment door in the AC mains input connector with a small
flat blade screwdriver (see Figure 2.2), and check that the fuse has the correct
rating (T250mA 20mm time-lag). The fuse carrier must be inserted into the
compartment with the orientation as shown. Do not force the carrier into the
compartment. Damage will result.
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