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I
Power Input
The miniature (3.5 mm) phone jack connects to the ul-
trasonic bias power supply, which creates the
volts necessary for electrostatic operation. The
supplied wall transformer
i s
to be connected to this
input jack arid plugged into an ALWAYS ON line
outlet. Make sure that there are no wall switches or
l i g h t dimmers associated withtheoutlet. All Acoustat
loudspeakers are intended to be left on
maintain full charge: power consumption is minimal
(about as much as a small night light).
NOTE:
Before plugging in thewalltransformer, make
sure that it is rated for your local line (mains) voltage.
The export transformer, labelled for 220 volts,
suitable for use with 220 to 240 volts, 50 to 60 Hz.
High Frequency Contour Switch
A three position switch has been provided on the rear
of the interface chassis to adjust the top-octave re-
sponse. Most situations
will
setting. However, there is no "correct" setting: adjust
this switch to suit your own preferences. Each step
of the switch causes a change of about 2 dB at 20 kHz.
1
Spiked feet
Four spiked feet have been included for installation
on each speaker. The feet serve to firmly couple the
speaker to the floor, yielding more solid bass re-
sponse. The feet can also be used to level the
speaker, as well as to "bite" through deep pile carpet-
ing to better stabilize the speaker.
The speakers should be set-up in their final listening
positions before installing the spiked feet, as moving
the speaker with the spikes installed can be more
difficult. Never drag the speaker across the floor with
the spikes installed. To install, simply screw eachfoot
into the receptacle located on the bottom of the
1 1
+5000
lo
all times
at
is
call for the "medium"
woofer cabinet. Insert the threads fully unless the feet are
being used to level the speaker, in whch case one or more
feet can be backed-out to even the speaker on the floor.
The use of spikedfeeton non-carpeted floors isgenerally not
recommended due to
ing the floor. It is possible to level the speaker on non-
carpeted flloors by substituting a hex- he ad 1/4"-20x 1" bolt for
the spiked foot. available from hardware stores.
THE
LISTENING ENVIRONMENT
I
Room Size
The Spectra 1100 is best suited to small to medium rooms:
those with minimum dimensions of 12 to 18 feet (3.5 to 5.5 me-
ters). Quite acceptable performance will be obtained in larger
rooms,
but with a slight loss of total volume capabiliiy.
Some of the principalconsideratiins which willdetermine the
performance potential of the speaker system
listed below. Remember, these are general guidelines only.
Room shape, furniture type, and personal taste are all impor-
tant variables. Every listening environment
experimentation
The Wall Behind The Speakers: The walls should be neither
excessively absorptive nor reflective. A highly reflective wall,
glass
such as large
to accentuate high frequencies. A highly absorptive wall such
as
heavy drapes or excessive application of specific sound
absorbing materials, will tend to muffle high frequencies, as
well as constrict the apparent depth of the sound stage. The
High Frequency Contour switch can help to compensate for
some of these variables.
The Orientation Of The Speaker System Within The Room:
For deepest low bass performance, the speakers should
project sound along the longer axis of the room. This is true
of all loudspeakers, and is in no way unique to Spectra.
is not possible in your room, the performance
significantly compromised other than a slight loss of deep
bass.
high chance
o f
scratching or dent-
the
as
installed are
is
different, and
is
the key to satisfaction.
windows or smooth hard plaster, will tend
12
this
If
not be
will
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