Yamaha EM-300 User manual
YAMAHA
SOUND
REINFORCEMENT
MIXER
EM-300
OWNER'S
MANUAL
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,0000
EM-300
PA
MIXER
The
YAMAHA
EM-300
PM
MIXER
with
its
twelve
input
channels,
two
output
channels
(stereo)
and
built-in
power
amplifier
is
extreme¬
ly
easy
to
use
and
operate.
It
is
equipped
with
a
graphic
equalizer,
reverberation
unit
and
moni¬
tor
circuit
which
extend
the
mixer's
application
range
from
ordinary
public
address
(PA)
to
business
uses.
Please
read
through
these
instructions
so
that
you
will
know
exactly
how
to
use
the
EM-300
in
accordance
with
the
intended
application.
CONTENTS
BEFORE
OPERATION.
1
BLOCK
DIAGRAM.
2
CONTROL
PANEL
OPERATION
.
3
CONNECTION
FIGURE.
5
BACK
PANEL
OPERATION.
6
INPUT/OUTPUT
SPECIFICATIONS.
8
CHARACTERISTICS
FIGURES.
9
CABLE
CONNECTIONS.
9
OVERALL
SPECIFICATIONS.10
BEFORE
OPERATION
Check
the
following
points
before
operating
your
mixer.
•
Installation
location
Wherever
possible,
avoid
installing
the
mixer
in
a
location
which
is
exposed
to
direct
sunlight,
or
a
great
deal
of
humidity,
dust
or
vibration.
•
Do
not
block
the
ventilation
holes
in
the
top,
bottom
and
back
panels
of
the
mixer
since
they
are
designed
to
dissipate
the
heat
which
is
generated
internally.
•
Connections
Make
absolutely
sure
that
you
use
the
commercially
available
power
line
voltage
to
power
the
mixer.
Refer
to
page
5
for
the
connections
and
then
pro¬
ceed
to
connect
properly.
When
performing
the
con¬
nections,
make
absolutely
sure
that
the
power
switch
is
set
to
OFF.
•
Speaker
impedance
The
acceptable
speaker
load
is
from
8
to
16
ohms
for
USA
and
Canadian
models
and
from
4
to
16
for
general
models.
Do
not
connect
a
speaker
system
with
a
total
impedance
of
less
than
the
minimum
above
rating.
•
Do
not
set
the
controls
to
the
following
positions.
INPUT
LEVEL
controls
—50
for
all
channels
Channel
faders
Max.
for
all
channels
LOW-EQ,
HIGH-EQcontrols
Max.
for
all
channels
GRAPHIC
EQUALIZER
Max.
Master
faders
Max.
Although
these
positions
are
not
the
ones
usually
used
for
normal
use,
bear
in
mind
that
if
you
inad¬
vertently
set
the
controls
to
the
positions
given
above,
the
conditions
governing
the
equipment
connected
to
the
input
connectors
and
the
load
speakers
may
result
in
damage
to
the
speakers.
•
Maintenance
The
color
of
the
mixer
panels
may
undergo
change
if
they
are
cleaned
with
a
paint
thinner
or
similar
liquid.
Always
use
a
soft
dry
cloth
to
wipe
off
any
dirt
on
the
panels.
1
INPUT
LEVEL
SW
CONTROL
PANEL
OPERATIONS
O
INPUT
LEVEL
controls
These
controls
are
used
to
select
the
input
levels
of
the
channels.
They
allow
a
five-step
switching
(+4/—20/—30/
—40/—50dB)
of
the
channel
input
levels
in
accordance
with
the
equipment
which
is
connected.
Setting
the
input
levels
properly
is
instrumental
is
pre¬
venting
overdrive
of
the
head
amplifier,
which
is
cause
of
distortion
in
the
sound,
and
in
helping
to
create
a
clear
and
natural
sound.
The
table
below
lists
the
general
settings.
Set
the
con¬
trols
to
the
proper
level
in
accordance
with
the
intended
application.
General
settings
of
input
levels
INPUT
LEVEL
control
setting
Input
source
MIC
-50
Low-level
microphone
(dynamic
type)
-40
High-level
microphone
(condenser
type)
INST
-30
Electrical,
electronic
musical
instruments
LINE
-20
Low-level
line
(general
audio
equipment)
+
4
High-level
line
(professional
equipment)
3
0
LOW-EQ
controls
These
are
used
to
control
the
sound
quality
in
the
low
range
of
each
channel.
The
low
frequency
of
100Hz
can
be
controlled
across
a
range
of
±15dB
between
the
left¬
most
and
rightmost
settings,
and
a
flat
response
can
be
yielded
at
the
center
(0)
position.
©
HIGH-EQ
controls
These
are
used
to
control
the
sound
quality
in
the
high
range
of
each
channel.
The
high
frequency
of
10kHz
can
be
controlled
across
a
range
of
±15dB
between
the
left¬
most
and
rightmost
settings,
and
a
flat
response
can
be
yielded
at
the
center
(0)
position.
O
MONITOR
2
PRE
FADER
&
EQ
controls
These
are
the
MONITOR
2
channel
controls
and
they
are
used
to
control
the
signal
level
which
is
fed
out
from
the
channel
fader
pre-stage
and
sent
to
the
MON
OUT
2
jacks.
They
are
also
used
as
holdback
(stage
monitor)
mixing
controls
for
performers.
©
MONITOR
1
(REV/ECHO)
POST
FADER
&
EQ
controls
These
are
the
MONITOR
1
channel
controls
and
they
are
used
to
control
the
signal
level
which
is
fed
out
from
the
channel
fader
and
equalizer
post-stages
and
sent
to
the
reverberation
circuit,
and
the
MON
OUT
1
and
ECHO
SEND
jacks.
These
controls
perform
the
following
roles
in
accordance
with
the
intended
application.
1.
Channel
controls
for
reverberation
effect.
2.
Channel
controls
for
echo
effect.
3.
Mixing
controls
for
holdback
(stage
monitor)
©
PAN
controls
These
controls
are
used
to
distribute
the
input
signals
of
the
channels
to
the
left
and
right
channels,
and
also
to
position
the
sound
images.
©
Channels
faders
These
are
used
to
set
the
mixing
level
of
the
channels
and
to
attain
an
overall
balance
in
the
volume.
0
AUX
IN
controls
These
are
used
to
control
the
AUX
IN
1
and
AUX
IN
2
input
levels.
©
AUX
PAN
controls
These
are
used
to
distribute
the
AUX
1
and
AUX
2
input
signals
to
the
left
and
right
channels,
and
to
posi¬
tion
the
sound
images.
0
REVERB/ECHO
control
This
is
used
to
control
the
overall
output
level
of
the
built-in
reverberation
unit.
When
an
echo
unit
has
been
connected
to
the
ECHO
RETURN
input
jack,
the
built-
in
reverberation
unit
is
cut
off,
and
the
overall
output
level
of
the
echo
device
is
controlled.
<D
MONITOR
1
master
fader
This
is
used
to
control
the
overall
level
of
the
signals
which
have
been
already
controlled
by
the
MONITOR
1
controls,
and
to
feed
the
signals
out
at
the
MON
OUT
1
and
Echo
send
jacks.
(Reverb
signals
are
not
controled.)
©
MONITOR
2
master
fader
This
is
used
to
control
the
overall
level
of
the
signals
which
have
been
already
controlled
by
the
MOMITOR
2
controls,
and
to
feed
the
signals
out
at
the
MON
OUT
2
jack.
©
GRAPHIC
EQUALIZER
These
nine
linear
controls
for
each
channel,
left
and
right,
vary
the
frequency
response
across
a
±12dB
range
for
the
frequencies
centered
on
63Hz,
125Hz,
250Hz,
500Hz,
1kHz,
2kHz,
4kHz,
8kHz
and
16kHz
in
accord¬
ance
with
the
intended
application
or
location,
and
they
thereby
vary
the
sound
quality
of
the
whole
system.
For
instance,
they
can
be
used
to
control
levels
at
frequency
ranges
where
howl
is
easily
produced,
and
to
control
the
sound
quality
finely
by
emphasizing
some
of
the
fre¬
quency
ranges.
©
PROGRAM
master
faders
These
are
used
to
control
the
overall
signals
which
have
been
already
mixed
by
the
channel
faders,
and
to
set
the
sound
which
is
ultimately
heard
through
the
main
speakers.
©
PROGRAM
VU
meters
These
are
used
to
monitor
the
output
levels
of
the
left
and
right
channels.
An
output
of
42.5W/8f2
is
indicated
when
the
pointers
deflect
to
0VU
and
likewise
85W/812
(full
power)
when
the
pointers
deflect
to
+3VU.
©
PHONES
jack
This
is
the
output
jack
for
stereo
headphones.
This
allows
the
power
amplifier
output
to
be
monitored
and
the
volume
is
controlled
by
the
PROGRAM
master
faders.
©
MONITOR
VU
meter
These
are
used
to
monitor
the
output
levels
of
MONI¬
TOR
1
and
MONITOR
2.
4
CONNECTION
FIGURE
FUSE:
Use
7A,
250V
fuses.
If
it
is
necessary
to
replace
a
blown
fuse,
disconnect
the
AC
plug
from
the
power
socket
and
then
replace
with
a
unit
having
the
same
ratings.
If
the
fuse
should
blow
during
operation,
it
means
that
there
is
a
failure
and
that
you
should
get
in
touch
with
your
dealer
For
holdback
Microphone
POWER
SW:
This
is
the
power
switch
which
accommodates
reversed
polari¬
ties
with
two
ON
positions
that
help
ta
minimize
hum
in
certain
instances.
USA
&
CANADIAN
MODELS
A0112T
(Self-Power
Monitor)
0
MON
OUT
1,
MON
OUT
2
O
INPUT
Connect
this
to
the
AC
power
outlet
SPEAKERS
r~r~
r~
r~
7T~
(
(
(
r-
-r~
MM
mi
iSS
■
')
U
U
U
U
©
LINE
OUT
GENERAL
MODEL
Tape
deck
(recording)
Main
speaker
(L)
Delay
unit
(echo
unit)
Tape
deck
(playback)
Main
speaker
(R)
BACK
PANEL
OPERATION
O
INPUT
Both
the
LO-Z
(low
impedance)
and
Hl-Z
(high
imped¬
ance)
INPUT
jacks
are
unbalanced.
Connect
low-impedance
and
high-impedance
micro¬
phones,
general
electrical
and
electronic
musical
instru¬
ments
and
LINE
inputs
to
the
Hl-Z
INPUT
jacks.
Connect
low-impedance
microphones
to
the
LO-Z
INPUT
jacks.
It
is
not
possible
to
use
both
the
LO-Z
and
Hl-Z
INPUT
jacks
simultaneously
for
the
same
channel.
©
SPEAKERS
Connect
the
main
speakers
to
these
jacks.
NOTES:
LOAD
INPEDANCE
8
~
16S2
U.S.A
&
CANADIAN
MODELS
4
~
16ft
GENERAL
MODEL
Do
not
connect
a
speaker
system
with
a
total
impedance
of
less
than
the
minimum
above
rating.
©
AUX
IN
Connect
the
tape
deck
(playback)
or
another
mixer
for
increasing
the
number
of
channels
to
these
jacks.
O
LINE
OUT
Use
these
jacks
to
feed
out
the
recording
output
signals
or
the
signals
produced
when
the
mixer
is
being
used
as
a
submixer
in
order
to
increase
the
number
of
channels.
©
MON.
OUT
1,
MON.
OUT
2
Use
these
jacks
to
connect
the
holdback
(stage
monitor)
speaker.
A
power
amplifier
is
required
for
both
MON
OUT
1
and
MON
OUT
2
jacks.
Use
a
speaker
with
a
built-in
power
amplifier
or
use
a
separate
power
amplifier.
©
ECHO
RETURN,
ECHO
SEND
These
are
the
input
and
output
jacks
for
the
echo
unit.
(When
the
echo
unit
is
connected,
it
is
no
longer
possible
to
use
the
built-in
reverberation
unit.)
Use
the
MONI¬
TOR
1
(REV/ECHO)
controls
to
control
the
echo
effect
for
each
of
the
individual
channels,
and
the
MONITOR
1
master
fader
and
REVERB/ECHO
control
to
control
the
overall
effect.
•
POWER
AMP
IN
These
external
input
jacks
may
be
used
in
various
ways,
such
as
when
using
the
built-in
power
amplifier
indepen¬
dently
(feeding
input
signals
of
another
mixer),
or
when
amplifying
PGM
signals
and
monitor
signals
with
a
separate
power
amplifier
and
the
built-in
power
amplifier
respectively
so
as
to
increase
power
of
PGM
signals.
•
MON.
SUB
IN
Connect
another
mixer
to
these
jacks
when
you
want
to
increase
the
number
of
monitor
channels.
6
INPUT/OUTPUT
SPECIFICATION
•
Input
jacks
Connection
Actual
Load
Impedance
For
Use
W/Nominal
Sensitivity
(at
max.
gain)
Input
level
Connector
Nominal
Max.
befor
Clip
INPUTS
(1
~12
CH)
-50
-40
-30
-20
+
4
Hi-Z
10X12
Lo-Z
60012
Hi-Z
3X12
Lo-Z
15012
—50dB
(2.5mV)
—40dB
(7.8mV)
—30dB
(25mV)
—20dB
(78mV)
+
4dB
(1.23V)
—50dB
(2.5mV)
—40dB
(7.8mV)
—30dB
(25mV)
—20dB
(78mV)
+
4dB
(1.23V)
—22dB
(6.2mV)
—12dB
(193mV)
-
2dB
(616mV)
+
8dB
(1.93V)
+32dB
(31V)
X
LR-3-31
and
Phone
Jack
AUX
IN
(1,2)
30K12
5X12
—20dB
(78mV)
—20dB
(78mV)
Phone
Jack
ECHO
RETURN
30K12
—30dB
(25mV)
—30dB
(25mV)
Phone
Jack
GEQ
IN
(L,
R)
iook!2
+
4dB
(1.23V)
+
4dB
(1.23V)
+18dB
(6.2V)
Phone
Jack
POWER
AMP
IN
(L,
R)
30K12
5x12
+
4dB
(1.23V)
Phone
Jack
MON
SUB
IN
(1,
2)
30K12
5K12
+
4dB
(1.23V)
+
4dB
(1.23V)
+24dB
(12.3V)
Phone
Jack
•
Output
jacks
Connection
mm
Output
level
Connector
Max.
befor
Clip
SPEAKER
OUT
(L,
R)
0.06512
00
33
200W
MOW
Phone
Jack
LINE
OUT
(L,
R)
1X12
iok12
60012
+
4dB
(1.23V)
OdB
(0.775V)
+
18dB
(6.2V)
+
14dB
(3.9V)
Phone
Jack
GEQ
OUT
(L,
R)
1X12
10K12
60012
+
4dB
(1.23V)
OdB
(0.775V)
+18dB
(6.2V)
+
14dB
(3.9V)
Phone
Jack
390
£2
iok!2
60012
+
4dB
(1.23V)
OdB
(0.775V)
+
18dB
(6.2V)
+
14dB
(3.9V)
Phone
Jack
10012
iok12
—20dB
(78mV)
-
6dB
(0.39V)
Phone
Jack
PHONES
15012
812
+
2dB
(0.96V)
Stereo
Phone
Jack
Note:
All
the
inputs
and
outputs
are
unbalanced.
8
CHARACTERISTICS
FIGURES
■
Frequency
response
FREQUENCY(Hr)
■
Channel
equalizer
frequency
response
CABLE
CONNECTIONS
There
are
many
types
of
connecting
cables
for
PA
record¬
ing.
This
allows
a
choice
in
accordance
with
the
intended
application.
Such
cables
are
sold
on
the
market
but
they
are
costly
and
there
is
no
great
variety.
When
using
the
cables,
the
established
procedure
is
either
to
make
them
■
Graphic
equalizer
frequency
response
FREQUENCY(Hi)
■
Output
versus
distortion
yourself,
bearing
in
mind
the
required
length
of
the
cables,
or
order
them
from
a
specialist
manufacturer.
The
types
of
connecting
cables
required
for
general
sound
systems
are
indicated
below.
Unbalanced
type:
Pin
plug
Unbalanced
type:
Standard
phono
plug
<ni
Unbalanced
type:
Pin
plug
White
(red)/hot
(+)
Black/cold
(—)
Shield/ground
White
(black)/hot
(+)
Shield/ground
_
White
(black)/hot
(+)
n>
Standard
phono
plug
Shield/ground
m>
9
OVERALL
SPECIFICATIONS
Channel
controls
PAN
(CHI
~CH12)
MONITOR
1
(REV/ECHO)
MONITOR
2
HIGH-EQ
LOW-EQ
INPUT
LEVEL
switch
(-50/-40/-30/-20/+4)
Channel
faders
Master
controls
AUX
IN
controls,
AUX
PAN
(1,2)
REVERB/ECHO
controls
MONITOR
master
faders
(1,
2)
PROGRAM
master
faders
(L,
R)
GRAPHIC
EQUALIZER
(L,
R)
Others
VU
meters
x
4
(PROGRAM
x
2,
MONITOR
x
2)
Power
output
200W
per
channel
(4
12,
1kHz,
0.5%)
MOW
per
channel
(8
12,
1kHz,
0.5%)
Frequency
response
20Hz
to
15kHz
0
±
IdB
(60W,
8
12)
20Hz
to
30kHz
0
(60W,
8
12)
Total
harmonic
distortion
Less
than
0.2%
(1kHz,
120W,
8
12)
Less
than
0.5%
(20Hz
~
20kHz,
120W,
812)
Intermodulation
distortion
Less
than
0.5%
(70Hz
:
7KHz
-
4
:
1
at
60W,
8
12)
Hum
and
noise
level
—1l8dB
(Equivalent
Input
Noise)
(20Hz
to
20kHz)
Maximum
gain
SPEAKERS
(L,
R)
81dB
(CH
IN
*
SPEAKER
OUT)
MON
OUT
(1,2)
54dB
(CH
IN
*
MON
OUT)
ECHO
SEND
30dB
(CH
IN
->
ECHO
SEND)
LINE
OUT
(L,
R)
54dB
(CH
IN
+
LINE
OUT)
G-EQ
OUT
54dB
(CH
IN
*
G-EQ
OUT)
AUX
IN
(1,2)
51dB
(AUX
IN
>
SPEAKER
OUT)
Equalizer
LOW-EQ
±15dB
(100Hz)
HIGH-EQ
±15dB
(10kHz)
GRAPHIC-EQ
±12dB
(63Hz/125Hz/250Hz/500Hz/1kHz/2kHz/4kHz/8kHz/16kHz)
Power
supply
U.S.A.
&
CANADIAN
MODELS:
AC120V,
4A,
50/60Hz
GENERAL
MODELS:
AC220/240V,
900W,50/60Hz
Dimensions
(W
x
D
x
H)
787
x
631
x
229
mm
(31
x
24-3/4
x
9”)
Weight
35
kg
(77
lbs)
*
Specifications
subject
to
change
without
notice.
10
■
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NIPPOM
CiftKKI
I
ill
LII!
HUlWW^FriI
J-T.i
i
',rj
■
.
9
7H
IK
Pri^r-pd
«fl
Ji»puni
(*
■
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