Speaker Connections; Level Controls - Yamaha M-4 Owner's Manual
Stereo power amplifier
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Also See for M-4:
- Owner's manual (12 pages) ,
- Owner's manual (12 pages) ,
- Service manual (25 pages)
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1. AC CONNECTION
1 As the rated
power
consumption
of the M-4
is 900W
(European
model), do not connect it
to an additional
AC receptacle on some other
piece of equipment,
but plug it directly into
a wall outlet.
2
Regardless of the position of the power switch,
the
additional
AC
power
outlet on the rear
panel
of the M-4
provides
AC power for a
maximum
consumption
of
100W.
(General
Export models only)
2. SPEAKER CONNECTIONS
Use
speakers
with
an
impedance
of 490-169
(General,
European
model)
and
85^16
(the
others) and connect them either to the A- or B-
terminals on the rear panel. When using two sets
of speakers at the A- and B-terminals simultane-
ously,
be sure
to use
only
speakers
having an
impedance
of
897-160.
(1682
for
British,
Australian, North European models)
Confirm that the polarities (+ & —) are correct and
connect the cords of the left speaker system to the |
L-side terminals and the cords of the right speaker
system to the R-side terminals.
|
Be
careful
to establish
correct
polarity
because.
reversed
connections
to one speaker will lead to
unnatural sound and poor bass reproduction.
CONNECTION
AND
OPERATION
3. CONNECTION
TO CONTROL
AMPLIFIER
€ Switch off the power to the control amplifier
as well as to the power amplifier.
€
Connect the output from the control amplifier
to the INPUT
terminals on the rear panel of
the M-4, being careful to connect
left to left
and right to right channels.
LEVEL CONTROLS
€
Level
controls are provided on the rear panel
to adjust
the
M-4 for use with any control
amplifier.
і
The
upper
knob
is for the left channel
and
the lower one for the right channel.
If the sound
is distorted
by using a control
amplifier with a high output,
lower the input
sensitivity
by
turning
these
knobs
counter-
clockwise.
Control
Amplifier
L ch
LEVEL
Control
ssa 8869
О
Rech
LEVEL
Speaker Systems
Speaker
:
Systems
When
listening at low volumes
Volume
adjustment
of the contro! amplifier can
be facilitated
by turning the set's LEVEL
con-
trol counterclockwise
a little. But if turned fully
counterclockwise,
no
sound
will
be produced.
MODE
SWITCH
• The
M-4 has a flat frequency response down
to
DC,
which
will
lead
it to amplify
even
very
low frequency
noise such as caused
by
record
warp
and
wow
of the turntable.
This
can
have adverse effects on the reproduction
of the program
material.
MODE
Switch
INPUT
|
Qe
Speaker
Output
Power
Amplifier
Input Terminal
ይ ር
input Capacitor
MODE
Switch 一 DC
(ар)
asuodsay
MODE
Switch—AC
Џа
the
AC
mode,
frequencies
roughly
below
10Hz wil! be cut off.)
Frequency (Hz)
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