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STEREO AMPLIFIER
CYBERNET CTS-300A
INSTALLATION
installation
of CTS-300A
is not complicated. However, the follow-
ing guidelines must be followed for satisfactory performance and to
assure ful! coverage under the terms of the warranty:
e Do not attempt to remove
the cabinet cover — there are no user
serviceable parts inside the unit
¢ Make sure the power switch is in
the Off position before making any connections @ The amplifier and
associated equipment may
be placed on a table, shelf or it may
be
mounted
in furniture suitably designed for the purpose @ The equip-
ment must not be exposed to excessive dust, moisture or direct heat
sources © Since the amplifier may generate a considerable amount of
heat when
operated
at high power
output, care must be taken to
provide a minimum
opening for free air movement, in and out of
the cabinet to the room.
AMPLIFIER CONNECTIONS
Refer to back side cover, Connection Diagram.
LOUDSPEAKERS
-
Connect left and right channel speakers to amplifier terminal on rear
panel.
e@
Use suitable gauge wire. For wire lengths of less than 6 meter or
20 feet, 2x0.75 mm2 wire is recommended. For longer distances,
2x1.5
mm?
wire should
be used. This is necessary
to avoid
power
loss and to maintain
good control
or damping of the
loudspeaker,
@
Use care not to short circuit speaker cables.
e@
Phase properly. That is, connect the positive or plus terminal on
each speaker to the corresponding plus terminal on the amplifier.
The minus terminals are likewise connected
together.
This in-
sures that the speakers are working together and not against each
other, providing optimum imaging and best bass response.
@
Take care to connect left and right speakers to the proper chan-
nel,
PHONO TURNTABLE
@ Use cables provided with turntable or obtain one insulated and
shielded
terminated
with standard cinch
(RCA type) plugs @ The
turntable should be connected
to the Phono Input jacks ¢ Connect
separate ground lead to amplifier GND terminal
@e Connect turntable
power plug to wal! receptacle.
TUNER
Use insulated and shielded audio cables terminated with standard
cinch plugs. Connect to Tuner Input jacks. Observe proper channel
connection.
Connect
power
plug from
the tuner
to wall outlet.
Provide suitable antenna.
AUXILIARY
(AUX) EQUIPMENT
Use insulated
and shielded audio cables terminated
with standard
cinch plugs. Conriect to AUX
Input jacks. Make proper channel con-
nection. Connect auxiliary equipment's
power plug to wall outlet.
TAPE RECORDER
Connect output of tape recorder (usually marked Line Output etc.)
to
left and
right Tape
Play jacks. Connect
tape recorder
input
(usually Line Input) to left and right Tape Rec jacks. Use insulated
and shielded audio cables. Connect
recorder's power plug to wall
outlet.
AMPLIFIER POWER SUPPLY
Plug the cord set into wall outlet supplying 220V 50 Hz AC. Make
sure power switch is in Off position and the Volume control is set
to minimum position before plugging the cord set.
CONTROL FUNCTIONS
0
e
Power Switch (POWER)
Push to turn power on.
Release to turn power off.
Speaker Selector (SPEAKERS)
Permits you to select one of four listening conditions.
A: Connects
the sound
output
to the speakers
attached to
the Speaker A output terminal.
B: Connects the sound output to the speakers attached to the
Speaker B output terminal.
A+B:
Connects
the
sound
output
simultaneously
to
the
speakers
attached
to
the Speaker
A
output
terminal
and
Speaker B output terminal.
Phones:
In this position,
all speakers
are silenced
and the
sound output is connected only to the headphones connected
into the Phones jack !ocated to the right of the switch. Since
the signal.is always fed to this jack, regardless of the switch
position, it is.recommended
that the headphones
be discon-
nected
when
not in use to avoid
possible
overload
or des-
truction.
Headphones (PHONES)
Accepts plug from a stereo headphone for private listening.
Tone Controls (BASS/TREBLE)
These controls allow you to adjust the tonal balance of the
sound output.
Bass:
Increases or decreases the level of the low frequencies
in the
program
material.
Clockwise
rotation
increases and
counterclockwise rotation decreases.
Treble: Operates in the same manner as the Bass tone control
except it provides adjustment of high frequency levels.
Filters (LO/HI)
Used to remove
low and high frequency noise from various
program materials.
Low: Filters out the very low frequencies. This can be parti-
cularly
useful
when
a turntable
produces
undesirable
low
rumbles.
High:
Used to remove
high frequency
noise sometimes
en-
countered in program materials.
' Volume/Balance Controls (VOLUME/BALANCE)
These
are concentrically
connected
controls
permitting
in-
dividual adjustment.
Volume: Permits adjustment of the volume for left and right
channels simultaneously.
:
Balance:
Provides
left to right balance of program
material.
Normally
this control should
be set to center
(12 o'clock)
Position.
Loudness Contour (LOUD)
When switched on (lever down) compensates for difficiencies
in human
hearing ability at low listening levels.
That is, the
audio level of high and low frequencies are boosted.
Mode Switch (MODE)
Determines
the manner
in which
program
material
will be
reproduced through the left and right channels. .
Stereo:
Provides
stereophonic
reproduction' of any
stereo
program source.
Mono:
A program
source
connected
to the
left and right
channel
input jacks is mixed and reproduced
through both
channels.
Tape Monitor (MON)
Selects
the output
of tape
recorder connected
to the Tape
Play jacks.
Also used when monitoring the program informa-
tion being recorded during recording.
Input Selector (SELECTOR)
Selects
the program
source
to be listened
to through the
loudspeakers
or headphones. Note that the output-from the
tape recorder can not be selected on this selector. See Tape
Monitor switch 9).
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