Cambridge SoundWorks Powered Subwoofer II Installation And Operating Instructions Manual - page 7
Note: Do not place the
subwoofer in shelving that
houses a phono turntable.
Strong bass from the speaker,
including the turntable’s own
rumble, could be picked up by
the turntable, fed back out the
speakers again, picked up by
the turntable yet again, and so
on. This condition, known as
acoustic feedback, will muddy
the sound, or worse, set up a
loud, low-frequency rumbling.
2. A listening room’s construc-
tion also has a marked affect
upon the very low frequencies
reproduced by the
Powered
Subwoofer II. Thin, relatively
flexible walls allow bass to
dissipate readily, as do open
doors, archways opening into
another room, and even open
windows. In addition, the
larger the room, the greater
the demand for low-frequency
acoustic energy. Therefore, for
best low-bass, the ideal room
for a home theater would be
moderate in size, solidly
constructed, with no openings
to other rooms.
Obviously, not all rooms meet
all these criteria. However, if
you have the option, set up
your home theater in the room
that comes closest. When
listening, shut the room’s
doors and windows if practi-
cal, which can make a surpris-
ing difference. If your listening
room is very large and/or
opens out into another room,
the higher acoustic output of
our original larger
Powered
Subwoofer may be necessary
(consult your store or a
Cambridge SoundWorks
Audio Expert).
An option is available from Cam-
bridge SoundWorks to optimize your
system. Low-cut filters keep the low
frequencies best left to the
subwoofer
out of the main front
speakers. This “eases” the burden
on front speakers and amplifier,
letting them play more cleanly at
higher levels.
Our inexpensive Low-Cut Filters
are ideal for use with Cambridge
SoundWorks
Model Seventeen™,
Model Six™ or Ambiance
®
speakers,
or other conventional systems of
reasonably wide range. You connect
these filters between your main
speakers and your amplifier. The
filters begin to block bass signals to
your main speakers below about
140 Hz, so that below 100 Hz,
almost no bass signals reach your
main speakers. A filter for your
center channel speaker is not neces-
sary with Dolby
®
Pro Logic
®
if you
set its Center Mode control to Nor-
mal (which rolls off frequencies
below 100 Hz).
Low-Cut Filters
• The filters can go at either end of
the left and right speaker wires.
You can, for example, connect
the filters’ INPUT FROM AMP
leads to the speaker terminals on
your receiver or amplifier, then
connect the speaker wires to the
filters’ OUTPUT TO SPEAKER
leads (using the wire nuts
supplied). Or, you can attach the
filters at the back of your
speakers. Connect the OUTPUT
TO SPEAKER leads to the
speaker terminals. Connect the
speaker wires coming from your
amplier to the INPUT FROM AMP
leads with the wire nuts.
• As with all speaker connections,
be sure to maintain consistency
with respect to the + and —
terminals on the receiver and
those on the speakers. The
connecting wires on the filters
are coded by the use of one
copper-colored lead and one
silver.
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