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Speaker phasing
One of the most important requirements for good stereo reproduc-
tion is correct speaker phasing (all speaker cones move in the same
direction when similarly energized).
For correct speaker phasing,
_all speakers must be connected correctly i.e. all © terminals of the
speakers should be connected to © terminals of the amplifier, and
© to ©.
If one connection
is reversed,
all others must also be
changed.
Otherwise
the speaker
phasing
becomes
reversed
so
'that the bass tones seem to be missing and the position of the in-
struments becomes obscure.
Proper phasing
Improper phasing
The @O connections of right
speaker are reversed, so two cones
move
in the opposite direction.
Both speaker cones move
in the
same
direction.
Speaker placement
Here are a few suggestions for speaker placement that wil! assist
you in obtaining an installation with satisfactory stereo sound.
Normally, the speakers are placed on the floor against the narrower
wall of
aroom.
The bass sounds can then be increased by moving
the
speakers
toward
the corners,
or decreased
by raising
the
speakers off the floor on suitable pedestals, and/or moving them
away from the wall a moderate distance.
If the speakers are posi-
tioned above the floor, do not place them higher than ear-level
while seated, since this produces an unnatural effect.
The
distance
between
speakers,
or the speakers
and a listener
depends
mainly on the room
size.
Generally
it is recommended
that the speaker/listener relationship be an equilateral triangle con-
figuration (as illustrated).
If the speker separation is too wide, an undesireable
"hole in the
middle" effect occurs.
Left speaker
a)
Right speaker
40° - 60°
Best listening position
Place the right and left speakers in similar acoustic environments,
otherwise you will obtain unbalanced sound.
For example, placing
one speaker
near an open door or archway will decrease the ap-
parent bass from that speaker.
PROGRAM SOURCE CONNECTIONS
Record player
Tuner
Connect the tuner to the TUNER
inputs.
Tape recorder
Other input sources
The AUX inputs are provided for connecting various input sources
such as an additional
tape deck or tuner, etc.
These
inputs are
identical
to the TAPE
or TUNER
inputs in sensitivity
and
im-
pedance.
GROUND CONNECTION
To prevent hum, be sure to connect the ground wires of the record
players to the amplifier ground terminals
[ #7].
Two
ground ter-
minals are provided for conveniently connecting each ground wire
of two record players.
If hum still exists, it may be helpful to connect the ground terminals
directly to earth via ground rods.
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