7
Level signal inputs of the
Powered
Subwoofer
. The following guidelines
will help you choose the best set-
ting. The differences between each
setting can be subtle, so don’t be
surprised if you can’t hear the
difference. You have found a good
setting if this is the case.
•
55 Hz or 80 Hz:
For use with any
of the following Cambridge
SoundWorks speakers–
New Ensemble
®
, New Ensemble II,
New Ensemble III, Tower™
, Tower
II, Tower III, Model Six™
. Also, any
other truly wide-range speaker
system. Which position to choose
(55 Hz or 80 Hz) is best decided
by listening.
Note for Ensemble owners:
The
Powered Subwoofer
is intended to
supplement, not replace the
separate subwoofers supplied with
these systems. Do not disconnect
your
Ensemble
woofers when
You can fine-tune the blend
between your main speaker system
and the
Powered Subwoofer
by
adjusting the four-position switch
labeled “Low-Pass Frequency.” The
optimum filter setting enables the
subwoofer to “take over” the task of
reproducing very low bass
seamlessly from your main speakers.
The Low-Pass Frequency selector
behaves the same whether you are
using the Speaker Level or Line
Selecting Low-Pass Frequency
LOW PASS
FREQUENCY (Hz)
55
80
100
140 (FROM LFE
OUTPUT)
using the
Powered Subwoofer
.
•
100 Hz:
For use with smaller
bookshelf sized speaker systems
with less low-bass reach. Use this
setting with the Cambridge
SoundWorks
Model Seventeen
™
and
Ensemble IV
.
•
140 Hz:
Use this setting with
small main speakers.
Special note about line-level
subwoofer outputs
Many receivers and all Dolby
Digital (AC-3) processors feature
dedicated subwoofer outputs. Some
of these outputs are full-frequency
bandwidth. Others deliver a signal
which is “Bass Only”. These two
types of subwoofer outputs should
be treated differently. Check your
amplifier’s specification list to
determine which type you have.
Most of the subwoofer outputs on
receivers (stereo or Dolby Surround
®
with Pro Logic) deliver a full fre-
quency range signal, the same
signal that is fed to the main
speakers. Customers using this type
of subwoofer output should set the
Low-Pass frequency as described in
the procedure above.
The second type of subwoofer
output sends a “Bass Only” signal
to the
Powered Subwoofer
. The most
common example is the Low Fre-
quency Effects (LFE) channel of a
Dolby Digital (AC-3) equipped
system. Set the Low-Pass frequency
to 140 (from LFE output) with this
type of subwoofer output. Try a
lower frequency setting only if there
is too much bass output on non-
Dolby Digital (AC-3) program
material.
It is possible to improve the
performance of your main speakers
by the use of optional Low-Cut
Filters (see page 9).
