Sony TA-F70 User Manual

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.
Best
sound
is
usually
obtained
in
a
room
with
carpeting
on
the
floor,
and
having
heavy
draperies
and
upholstered
furniture.
Since
each
room
has
its
own
individual
acoustic
characteristics,
which
are
a
function
of
its
size,
construction
and
furnishings,
some
ex-
perimentation
with
speaker
placement
is
generally
necessary
before
the
correct
balance
of
stereo
image
and
bass
response
is
obtained.
This
will
be
time
well
spent,
resulting
in
your
enjoyment
of
the
maximum
capabilities
of
your
music
system.
PROGRAM SOURCE CONNECTIONS
Record player
This
amplifier
features
two
sets
of
phono
inputs—PHONO
1
and
PHONO
2.
These
are
convenient
for
comparing
two
types
of
car-
tridges
or
record
players.
The
unit
includes
a
head
amplifier
at
the
PHONO
inputs
for
the
use
of
moving-coil
cartridges,
which
is
controlled
by
the
front
panel
HEAD
AMP
selector.
This
head
amplifier
boosts
the
minute
car-
tridge
output
to
a
level
suitable
for
a
typical
magnetic
phono
input.
Insert
the
shorting
plugs
(supplied)
for
muting
the
PHONO
1
or
2
terminals
when
these
inputs
are
not
inuse.
Never
insert
the
short-
ing
plugs
in
the
REC
OUT
1
and
2
jacks.
Tuner
Connect the tuner to the TUNER inputs.
Note
that
antenna
installation
and
multipath
interference
problems
are
important
factors
when
listening
to
FM
broadcasts.
Tape recorder
The
amplifier
permits
the
connection
of
up
to
two
tape
recorders.
For
playback
of
a
taped
program,
connect
the
tape
recorder
line
outputs
to
the
amplifier
TAPE
1
or
TAPE
2
inputs.
For
tape
record-
ing,
connect
the
tape
recorder
line
inputs
to
the
amplifier
REC
OUT
1
or
REC
OUT
2
jacks.
These
are
parallel
connected,
so
that
two
simultaneous
recordings
from
the
same
source
are
possible.
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.

Sony TA-F70 Specifications

General

Brand	Sony
Model	TA-F70
Category	Amplifier
Language	English