is uneven. Some frequencies will sound exaggerated
relative to others, or the subwoofer will sound thin and
lack impact. The Boundary EQ control allows you to
compensate for the effects of room boundaries on the
frequency response
of the subwoofer. Adjusting the control enables you to
achieve smooth low frequency output from the sub-
woofer regardless of its location in your room.
The following diagrams shown in Fig. 1 show the corre-
lation between subwoofer placement and Boundary EQ.
These diagrams are guidelines only. Your room
acoustics and personal tastes will ultimately dictate the
final setting.
LOW PASS FILTER: This control determines the upper-
limit frequency the subwoofer will reproduce. For
example, setting the filter at 100Hz will cause the
subwoofer to reproduce only frequencies below 100Hz.
The Low Pass Filter is continuously variable between
40Hz (low bass) and 180Hz (upper bass), to
accommodate different speakers.
Two tips on using the Low Pass Filter:
As a starting point, set Low Pass Filter to the 1 o’clock
position. This will result in an 80Hz low pass. As the set-
ting is typical for most Dolby Digital / DTS applications.
Note: The LFE input bypasses the adjustable 12dB Low
Pass Filter.
See the Fine-Tuning section for further adjustment
guidelines.
SUBWOOFER PHASE: This switch sets the phase of
the subwoofer at either the 0° position (normal phase) or
the 180° position (reverse phase) to achieve the
smoothest possible bass response in your system.
This phase-reversing option is important because if bass
frequencies come from both the subwoofer and the main
speakers, peaks and dips in the frequency response can
occur at the listening position. In these cases, reversing
the subwoofer phase can improve blending and balance.
To properly set the Subwoofer Phase:
• Play familiar music, reversing phase settings. And listen
from your usual position.
• Avoid evaluating while standing above the subwoofer or
amplifier; sound at the listening position will be
significantly different.
• The correct setting is the one in which the bass is the
loudest at the listening position.
POWER MODE: This feature automatically switches
your SW10 ll or SW12 into minimum-power mode (ie,
sleep) whenever no signal is present for 20 minutes.
When a signal is received, it immediately turns on again.
As AUTOMode is automatic, it requires no adjustment,
nor is there a need to turn the SW10 ll or SW12 on and
off every time it is used. When in ON Mode, the sub-
woofer is always on.
(9 pages)
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