Subwoofer Positioning
1
2
2
3
3
4
'Soffit' Mount
5
The figure to the left shows some example subwoofer positions
within a room. Unless mentioned otherwise, the vents of the
subwoofer should face towards the nearest wall.
1
Recommended position.
2 & 3
Recommended only when using two subwoofers.
4
This arrangement may cause a loss in low
frequencies if the distance from the listening position
to the front wall is between 1 and 3m.
5
The 'Soffit' or flush mount is also recommended.
Here the vents must radiate into the room.
Safety Considerations
The 1094A/92A has been designed in
accordance with international safety
standards. However, to ensure safe
operation and maintain the instrument
under safe operating conditions the
following warnings and cautions should
be observed.
-
Servicing and adjustment should
only be performed by qualified
service personnel.
-
Opening the amplifier's rear panel
is strictly prohibited except by
such persons who are aware of the
hazards involved.
-
It is forbidden to use this product
with an unearthed mains cable,
which may lead to personal injury.
Warning!
This equipment is capable of delivering
sound pressure levels in excess of
85dB, which may cause permanent
hearing damage.
Overload Indicators
The 1094A contains a red 'Clip' LED.
This indicator is located on the rear
panel of the subwoofer.
The clip LED will light if the amplifier
is overloaded. If this occurs frequently,
reduce the input level to the subwoofer
until the clip LED stops blinking.
Positioning in the Room
The placement of the subwoofer in the
room will affect the overall frequency
response of the system as, with low
frequencies, the effects of the room
are more apparent.
The subwoofer radiation ports should
be placed within 1m of a wall. The
amplifier panel should not be positioned
less than 10 cm from a surface, as this
may cause heat dissipation problems
from the amplifier back plate. The
placement will affect the phase
difference between the main monitors
and the subwoofer, and also the bass
roll-off rate. These effects can be
compensated by the use of the controls
in the amplifier unit; but consideration
should be made when placing the
subwoofer.
Choose a central and symmetrical
position for the subwoofer as this will
give an even phase match between all
monitor channels. Positioning the
subwoofer close to a corner should be
avoided as it will boost the bass level
at lower frequencies and may cause
asymmetrical spatial imaging.
See the section titled 'Subwoofer
Positioning' for examples of
recommended positions within a room.
Figure 2. Subwoofer positioning
