Hafler TRM10.1 - Manual (Page 18)

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LOCATION
The acoustic properties and size of the listening environment can drastically influence the SPL (Sound Pressure Level) and
f3
(-3dB roll-off) of the subwoofer. However it's important to note that large or small acoustic spaces have little to no effect on
the subwoofer cone excursion & box "Q." For the most part, we'll discuss the optimum location for two different installation
methods: Studio Installation and Home Theater Installation.
STUDIO INSTALLATIONS
In studio installations, damping material is usually used on the walls and ceilings make the room “acoustically dead.” The
main monitors are typically located 3' to 6' from the mixing console and therefore considered a near field (close field) appli-
cation. In this type of anechoic environment, the subwoofer will tend to experience minimal "Boundary Loading" effects.
For studio installations, HAFLER recommends experimenting with different locations within the studio that minimizes rattles
or vibration of other equipment. You can fire the subwoofer downward (FIG. 1) or fire the subwoofer directly facing for-
ward (FIG. 2). In either application keep the subwoofer cabinet at least 5" (12.7 cm) away from any wall.
I
NSTALLATION
FIG. 1
Downward Firing
FIG. 2
Forward Firing
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 and
f3 of the subwoofer because
the walls are very reflective. The only elements in these
installations that acoustically "absorb" sounds are
furniture 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 deter-
mine which type of bass response works best in your
home theater.
Keep subwoofer enclosure
5" (12.7 cm) from any wall
FIG. 4
Position the subwoofer near a wall or in a corner