created by a turntable or record changer and acous-
tically coupled feedback.
FLAT
filter disconnected.
FILTER . . . low frequency rumble and noise below
50 Hz are reduced when the switch is in the FILTER
position.
H. F. (HIGH-FREQUENCY FILTER): Use the H. F.
filter switch to reduce objectionable high-frequency
noise such as record scratch.
FLAT . . . filter disconnected.
FILTER . . . high frequency noises above 5000 Hz
are reduced when the switch is in the FILTER posi-
tion.
LOUDNESS
When the volume is reduced, the music will seem
to lose much of its bass and some of its treble.
This effect is due to the sensitivity characteristic
of human hearing. The response of the human ear to
bass tones decreases more rapidly than its response
to notes centered in the mid-tonal range. The LOUD-
NESS control automatically provides the correct
amount of bass required to compensate for this
change in response of the human ear at low-loudness
levels. In the COMPENSATED position the volume
control is converted to a loudness compensated con-
trol. Use this position to listen at low volume and
still hear full-bass response.
BALANCE
The BALANCE CONTROL adjusts for unequal vol-
ume in either the left or right channels. The volume
of each channel can be varied relative to each other
without affecting their combined loudness.
LEFT . . . turning the control to the left accents
the left channel by reducing the right channel
output.
RIGHT . . . turning the control to the right accents
the right channel by reducing the left channel
output.
Balancing your Stereo
The performance and enjoyment of a stereo sys-
tem is greatly increased when the sound is properly
balanced. The balance of the stereo system is af-
fected by many things including room acoustics, fur-
niture placement, room shape, small differences in
loudspeakers, etc. To assist you in balancing your
stereo system in your room here is the procedure
to determine correct phase and program loudness.
TO ADJUST PHASE
1. Play a familiar record.
2. Press the MODE pushbutton to the MONO posi-
tion.
3. Turn BALANCE control to 12 o'clock position.
4. Stand about 10 feet in front of and midway be-
tween the loudspeakers. The sound should appear
to come from directly in front of you. If the sound
is not directly in front of you with the PHASE
switch in the NORMAL position, reverse the leads
on one loudspeaker. When the sound comes from
directly in front of you the speakers are in PHASE.
Use the PHASE switch to correct for out of phase
program sources.
TO BALANCE LOUDNESS
1. Press the MODE pushbutton to the MONO posi-
tion.
2. Play a familiar record.
3. Turn the BALANCE control to the 12 o'clock posi-
tion.
4. While the program is playing, stand between the
two loudspeakers. Listen for a difference in loud-
ness between speakers. Next, set the MODE se-
lector to STEREO. If there is then a difference in
loudness turn the BALANCE control toward the
speaker that is not as loud. Adjust the BALANCE
control until the sound is satisfactory between
both speakers.
7
(24 pages)
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