OPERATION
The two controls of the
Spacexpander
can be preset once you have selected positions that satisfy
your listening preference. The MODE SELECTOR switch on the Electronics Chassis is probably the
most important (and least used) control. Its position determines the way the reverberation is added
to the home music system You have your choice of three different effects.
MODE SELECTOR
NORMAL
is used for most listening. In this position you can add as much reverberation (or
none) as you want to your regular listening material - stereo or monophonic radio, tape, or
phono
graph. As you rotate the Control Unit knob from MIN (minimum) to MAX (maximum) the
amount of reverberation will increase from practically none to more than that usually heard in
an auditorium. Some place between these extremes is the amount of reverberation that creates
the illusion that is pleasing to you Once this point has been found you need never rotate the
knob again - except to demonstrate the
Spacexpander
to friends. To turn the reverberation
off
just pull up gently on the Control Unit knob until it clicks and all reverberation will be gone.
Push the knob down and you have the same amount of reverberation you originally selected
without hunting for a special adjustment
REVERB ONLY
is used mostly with center channel and monophonic systems or for special
effects THIS IS NOT A STEREOPHONIC MODE OF OPERATION. All signals coming out of the
Spacexpander
in this MODE SELECTOR position are monophonic. The Control Unit knob will just
increase and decrease the sound from the speakers since there is
only
a reverberated signal -
the knob can be set to the MAX position and forgotten because the volume control of the home
music system will now have the same effect on the operation of the home music system
.
The
push-pull switch on the Control Unit knob must be pressed in or
no sound will be heard from
the speaker(s). In the REVERB ONLY position the sound heard will be an unnatural sound - just
echoes without any
of the pure original sound. Since this is something that you
would never
hear normally, it is considered a special
effect .But if you
use a small amount of this unnatural
sound in a center channel, it will blend with the normal sound from the left and right channel
speakers. This mode of operation will not create exactly the same sound quality as when the
MODE SELECTOR switch is in the NORMAL position and used for the center channel. The NORMAL
position produces a variable blend of the pure, original signal and the reverberated signal -
REVERB ONLY is just that: there is no pure, original signal to blend electronically, with the
reverberated signal and all you hear is the echo effect.
CENTER
-this position of the MODE SELECTOR switch is also a monophonic output mode of
operation. The signal at OUTPUT A and OUTPUT B or C is the same. THIS IS NOT A STEREO
PHONIC
MODE OF OPERATION. Operation in this position is like that in NORMAL except it is not stereo. The
Control Unit knob blends the amount of reverberation, or turns it
off
or
on.
exactly as it does in
the NORMAL position.
CONTROL UNIT KNOB
In the NORMAL and CENTER positions of the MODE SELECTOR switch the Control Unit knob varies
the amount of
reverberation
from MIN (minimum) to MAX (maximum) as the markings on The
control plate indicate .The pure, original signal does not change volume as the control knob is
rotated. In the REVERB ONLY position of the MODE SELECTOR switch there is no pure, original
signal -
only
the reverberated signal. Rotating the knob in this mode is like adjusting the
volume control on the home music system control panel.
Push-pull ON-OFF switch-
Besides rotating, the Control Unit knob also moves in and out. Pulling
the knob out, until a slight click is heard, will stop the reverberation just as if you turned the
knob to The MIN position. Once you select the amount of reverberation you
can use the push
-
pull action to turn it on and off without rotating the knob. THIS SWITCH DOES NOT TURN OFF THE
POWER TO THE ELECTRONICS UNIT - THE TUBES STAY LIGHTED. It only controls the reverberated
signals.
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