Hafler VRM 25, Руководство пользователя

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Home Theater Installations
Home Theater installations are typically medium sized
living rooms or game rooms that have large flat, uncov-
ered walls. Acoustics in this type of installation can
have a big effect on the SPL (Sound Pressure Level) and
f3 (low frequency cut-off) of the subwoofer because the
walls are very reflective. The only elements in these
installations that acoustically “absorb” sounds are furni-
ture and carpet. Dramatic “Boundary Loading” can be
achieved by locating the subwoofer under a table, next
to a wall or in a corner (FIG. 4), thus increasing SPL
and lowering the f3 of the subwoofer system. Locating
the subwoofer in the middle of the room or in a large
open area where there are few reflective surfaces will
cause a decrease in SPL and an increase in f3.
Experiment with different locations in the room to
determine which type of bass response works best in
your home theater.
– 6 –
Listening Area
Left
Front
Right
Front
Center
Front
Right
Rear
Left
Rear
Subwoofer
Location
The size of the room used for your Home Theater can have a significant effect on the bass response of your system. Since
many movies exaggerate explosions, earthquakes, and other low frequency effects, a high demand on the subwoofer system
is required. Your Hafler subwoofer is specially designed for these high levels of excursion and linearity. In order to get the
most out of your subwoofer, Hafler has documented the differences between typical Studio and Home Theater installations.
Typical Studio Installations
In studio installations, damping material is usually used on the walls and ceilings make the room “acoustically dead." In
this type of anechoic environment, the subwoofer will tend to experience minimal “Boundary Loading” effects. Firing the
subwoofer downward (FIG. 1) or directly facing forward (FIG. 2) and keeping the cabinet at least 5” (12.7 cm) away from
any wall will provide best results.
FIG. 1
Downward Firing
FIG. 2
Forward Firing
Keep subwoofer enclosure 5”
(12.7 cm) from any wall
Installation