Yamaha EM-300B User manual

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How to use
this manual
Yamaha EM-Mixers are equipped with features
and capabilities unique among mixers in their
price range. To take the best advantage of your
mixer, we recommend careful reading of this
Instruction Manual... even if you already have
a good general understanding of mixers. The
setups on the following pages are meant only
as guidelines. We have attempted to cover many
applications. It would be impossible to cover
all conceivable setups, which are infinite as your
own imagination.
Index
SECTION ONE
Brief Operating Instructions
Functional descriptions of each control, each
meter, and the input/output/accessory jacks.
Also, mixer specifications. a
SECTION TWO
Introduction
A general description of the EM-Mixers, their
features and capabilities, and how to use them.
SECTION THREE
Detailed Instructions
Detailed descriptions of operating procedures,
contro! functions, jack functions, and
connections to speakers and accessory
equipment.
SECTION FOUR
Applications
Detailed discussion of several applications
from sound reinforcement (PA) to recording.
SECTION FIVE
Balanced Input Transformer Modules |
Installation instructions for balanced input
transformer modules or Yamaha EM-150IIB,
EM-200B and EM-300B.
Block Diagrams
Troubleshooting
Warranty and Service
The EM-Mixer Warranty, and what to do if
you should encounter any problems. Also, a
procedure to verify proper performance.
10
14
19

SECTION
ONE
=
Brief
Operating
Instructions
NOTE: Be sure the AC POWER switch is turned OFF
when making all signal and speaker connections.
nm O Ou»
"nmm О our»
FRONT PANEL
A.
Pan This knob feeds the input channel signal to a
pair of mix buses to create the stereo program mix
(Left and Right program buses}. The stereo program
bus then feeds the Speaker, Line, and Headphone
outputs via the Master Program faders.
Monitor 1 Send (Rev/Echo) This knob feeds the
input sianal to the mix bus which, in turn, feeds the
Monitor 1 output. The same bus also drives the
built-in reverb or external reverb/echo (effects)
units; the send is post-EQ and fader.
Monitor 2 Send This knob feeds a pre- EO and pre-
fader signal to a second monitor mix bus which,
in turn, feeds the Monitor 2 output.
. High and Low EQ Controls These continuously
adjustable knobs allow for +15 dB of bass and
treble equalization on each input channel. Response
is "flat" at center position. |
F.
c AC
Input Level Selector Switch This switch adjusts the
input channel's sensitivity for best results with
different input sources. For Models EM-10011 and
EM-150!1B this switch is а 3-position slide switch
(Line/Instr/Mic). On the EM-200B and EM-300B,
the level switch is a b-position rotary knob.
Channel Fader On Models ЕМ-10011 and EM-15011B
rotary faders set the mix level of each channel.
Models EM-200B and EM-300B have smooth linear
slide faders that also provide a good visual indication
of the mix-level for each channel.
. VU Meters Two meters indicate the average speaker
power output level. On the EM-300B, an additional
set of meters indicates the average output level of
the two Monitor mix buses. The meters are
illuminated when AC POWER is ON.

Кы
ЕМ-ЗООВ
Ou»
Н. Graphic Equalizer (Except on ЕМ-10011) Two banks
of linear slide controls independently vary the
frequency response of the Left and Right Program
outputs. There are seven G-EQ controls per channel
on the EM-15011B and nine controls per channel on
the EM-200B and EM-300B. Center detents mark the
"flat" position (no EO effect) for each control.
Aux Pan (Models EM-200B and EM-300B only) These
controls
position
the
Aux
1
and
Aux
2
Input
signals
Left-to-Right
on
the
stereo
program
bus.
|
Master
Reverb/Echo
This
control
sets
the
level
at
which
the
returning
Reverb/Echo
signal
(or
the
reverb
from
the
built-in
spring)
is
mixed
into
the
stereo
program
bus.
(The
mono
signal
is
applied
equally
to
the
Left
and
Right
program
mix
buses
and
is
thus
a
“center”
effects
return.)
If
the
Echo
Return
jack
is
used-as
an
auxiliary
monaural
line
input,
Master
Reverb/Echo
adjusts
the,
level
of
the
“auxiliary” input source.
à
vu
г@
tof
af if
|
=
N.
— I
CAM
M N
Headphones Jack This TRS (tip-ring-sleeve) stereo
phone jack can be used with any stereo headphones.
It carries the same signal as the Speaker outputs, but
at lower level, The headphone volume is controlled
by the Master Program faders.
Auxiliary Volume These controls set the level of any
program fed to the mixer via the Left and Right Aux
Input jacks. Following these controls, the aux inputs
are also affected by the Master Program faders.
Master Program Faders (Left and Right) These
controls adjust the lével of corresponding Left and
Right program mixing buses which simultaneously
feed the Speaker, Graphic ЕО, Line, and Headphone
outputs," The Master Program faders DO NOT affect
the mixer's Monitor or Echo outputs.
Master Monitor Faders (1 & 2) These controls adjust
the overall level of the Monitor Outputs..
` *NOTE: In this manual, we use the terms “stereo program bus”
and "Left and Right program mixing buses" interchangeably.

EM-100II Rear Panel
EM-150IIB Rear Panel
REAR PANEL
A.
Power Switch This toggle switch has two "ON"
positions that reverse the AC power line polarity.
Choose the ON position with least hum.
Low Impedance Channel Inputs These low-
impedance XLR connectors accept inputs such as
professional low-impedance microphones and
electronic musical instruments having low impedance
outputs, The XLR inputs are unbalanced," but may
be converted to balanced (floating) inputs by the
addition of easy-to-install optional "Balancing
Transformer Modules" (not available for the
EM-10011). :
High Impedance Channel Inputs These TS (tip-sleeve)
phone jacks are designed for high or medium
impedance microphones, low-level instruments
(like electric guitars or instruments with pick-ups),
or high level instruments (such as keyboards).
. AC Power Cord This 3-wire cord is for connection
to any 110-120 V AC, 50 or 60 Hz grounded outlet.
*NOTE: The terms balanced and unbalanced, as used in this
manual, have nothing to do with stereo perspective or signal
level. Balanced refers to a 2-conductor shielded cable in which
neither signal-carrying wire is grounded. '
Fuse Holders Always replace the fuses with the same
| size and type (AGC or equivalent).
. Speaker Output Jacks These standard phone jacks are
Left and Right speaker-level outputs from the built-
in stereo power amplifier. There are two paralleled
Jacks per channel; this internal “Y” adapter is pro-
vided as a convenience to power two separate sets of
speakers simultaneously. (Refer to page 11).
Normally, the Program mixing buses feed the
speaker outputs, and both jacks from each power
amp channel are simultaneously controlled by the
corresponding Master Program faders. The Power
Amp In jacks do permit other signal sources to feed
the speaker outputs (in lieu of the stereo program
mix), such as the monitor mix buses or even an
external mixer or keyboard.
. Power Amp Inputs These jacks permit the con-
nection of any line-level low: or high impedance
signal directly to the mixer's power amplifier,
replacing the internal signal flow from the stereo pro-
gram mix. The jacks are useful for inserting a com-
pressor/limiter ahead of the power amp.

EM-200B Rear Panel
E P
rm (акт Qt, CH ae orar сөз Qua Gee ент
Fes PER HERR "n en AT pH
logan
ре f E 1 ы j 4 е, 2
EM-300B Rear Panel
CAUTION: NEVER CONNECT THE MIXER'S
SPEAKER OUTPUTS, OR ANY OTHER SPEAKER-
LEVEL SIGNAL, TO THE POWER AMP OR G-EQ
INPUTS.
H.
Graphic ЕС Outputs (Not on ЕМ-10011) These jacks
feed the signal from the two Graphic Equalizers to -
any line-level high impedance input, for instance an
additional external power amplifier or a compressor/
limiter. The signals are also applied, internally, to
the mixer's stereo power amplifier, regardless. of
whether these jacks are in use.
Graphic ЕО Input Jacks (Not on ЕМ-10011) These
standard phone jacks connect a line-level, high-
impedance source into the Left and Right Graphic
Equalizers, replacing the normal, internal signal
flow from the Mixer's line outputs to the Graphic
EO inputs.
are high impedance line-level outputs carrying the
respective Monitor 1 & 2 mixes. They are con-
trolled by the Master Monitor faders (the Master
Program faders have no effect here).
(8 o o o o o o9€0
. Echo Return Jack This standard phone jack accepts
the output of an external echo device or any other
high-impedance, line-level source. Return level is
controlled by the Master Reverb/Echo control. Use
of this jack disconnects the internal Reverb spring.
Note: If Echo Send is patched directly into Echo
return, the Monitor 1 bus may be used for a group
submix (positioned at stereo center); the subgroup
level is then set by Master Reverb/Echo.
. Echo Send Jack This standard phone jack feeds the
mixed signal from all channels' Monitor 1 controls to
an external echo, reverb, or digital delay device. Not
affected by the Master Reverb/Echo control, Echo
Send can be used as a mono auxiliary low-level line
output (—20 dB) when the Monitor 1 output level
(+4 dB) is too high.
. Monitor Sub Input Jacks These high-impedance
standard phone jacks apply line-level, low or high
J. Line Output Jacks These standard phone jacks are impedance inputs directly to the Monitor 1 & 2
high-impedance, line-level outputs carrying the Left mix buses. The Monitor Sub Inputs are subject to
and
Right
program
mix.
|
the
Master
Monitor
faders.
K. Monitor Output Jacks These standard phone jacks
. Auxiliary Input Jacks These Left and Right standard
phone
jacks
apply
line-level,
high
impedance
inputs
to
the
Left
and
Right
Program
Mixing
buses.
Incom-
ing
signal
level
is
controlled
by
the
Aux
Volume
controls
and
the
Master
Program
faders.

GENERAL SPECIFICATIONS -
[MODEL _ — [| . м — | в |
- CHANNEL 1 to 6 (HZ 8
CON BUX IN( RIS 0-2), AUX IN (L&R), LO-Z), AUX IN (182),
MOR a De Sue CRF). | MONITOR SUB IN (1&2), | MONITOR SUB IN (182).
MONITOR SUB IN (12h | ECHO RETURN, GRAPHIC | ECHO RETURN, GRAPHIC
AMP IN (LRRD EQ IN (L&R), POWER AMP | EQ IN (L& R}, POWER AMP
| IN (L&R). IN (L&R).
VOLUME, INPUT LEVEL (-50/-85/-20 dB* sensitivity | FADER, INPUT LEVEL (—50/—40/—30/—20/+4 dB*
selector
switch),
HIGH-EQ,
LOW-EQ,
MONITOR
1
sensitivity
selector
switch),
HIGH-EQ,
LOW-EQ,
MONITOR
1
(REV/ECHO), MONITOR 2, PAN (REV/ECHO), MONITOR 2, PAN
Program (L & В}, Monitor (1 & 2). б
EM-200B EM-300B
CHANNEL 1 to 8(HI-Z &
Like EM-200B, but 12 channel
NUMBER OF INPUTS inputs
INPUT CHANNEL
CONTROLS
SPEAKERS (L&RX2),
MONITOR
OUT
(1&2),
ECHO
SPEAKERS
(L&RX2),
MONITOR
OUT
(1&2),
ECHO
SEND,
LINE
OUT
(L&R),
SEND, LINE OUT (L&R),
GRAPHIC EQ OUT (L& R), PHONES (stereo).
PHONES (stereo). (La R) (stereo)
PROGRAM
(L&R),
MONITOR
(1
&2),
REVERB/ECHO,
PROGRAM
faders
(L&R),
MONITOR
faders
(1
&2),
MASTER
CONTROLS
AUX
IN
(L&R).
REVERB/ECHO,
AUX
IN
(1&2),
AUX
PAN
(1&2).
Built-in Accutronics spring-type reverberation unit;
ECHO
AND
REVERB
provisions
for
connection
of
external
reverb,
echo
delay
or
other
effects
devices.
80 dB, CHANNEL IN to 82 dB, CHANNEL IN to
SPEAKER OUT, SPEAKER OUT;
54 dB, CHANNEL IN to 54 dB, CHANNEL IN to
NUMBER OF OUTPUTS
78 dB, CHANNEL IN to
SPEAKER OUT;
54
dB,
CHANNEL
IN
to
MONITOR
OUT;
MONITOR
OUT:
MONITOR
OUT:
30
dB,
CHAN
N
EL
IN
to
30
dB,
CHANN
EL
IN
to
30
dB,
CHANNEL
IN
to
ECHO
SEND;
MAXIMUM
VOLTAGE
GAIN
ECHO
SEND;
54
dB,
CHANNEL
IN
to
'
54
dB,
CHANNEL
IN
to
54
dB,
CHANNEL
IN
to
-
LINE
OUT;
LINE
OUT;
LINE
OUT;
54
dB,
CHANNEL
IN
to
54
dB,
CHANNEL
IN
to
48
dB,
AUX
IN
to
G-EQ
OUT:
G-EQ
OUT;
50 dB, AUX IN to 52 dB, AUX IN to
SPEAKER OUT. SPEAKER OUT.
Q, +15 dB max. at 100Hz; HIGH-EQ +15 dB max. at 10 kHz; shelving characteristic.
+12 dB max. at 60 Hz, 150 Hz,
400 Hz, 1 kHz, 2.5 kHz,
5 kHz & 10 kHz, "flat" at
center detents.
CROSSTALK
—55
dB
@
1
kHz,
adjacent
inputs
or
input-to-output.
AMPLIFIER
TYPE
All
solid
state,
discrete
and
integrated
circuit
(1C).
POWER
REQUIREMENTS
[120
V
AC,
50
or
GO
Н2
3-wire
|
Like
EM-1001l,
but
170
watts.
|
Like
ЕМ-1001,
but
290
watts.
|
Like
ЕМ-1001,
but
400
watts.
One
3
ampere,
AGC
One
7
ampere,
AGC
Two
5
ampere,
AGC
type,
in
|
Two
7
ampere,
AGC
type,
in
AC
MAINS
FUSE(S)
type
fuse.
`
parallel
configuration.
parallel
configuration.
Output
power
delivered
to
speakers
decreases
as
load
impedance
falls
below
2.5
ohms;
relay
mutes
input
to
power
OUTPUT
PROTECTION
amplifier
to
protect
speakers
from
Turn-ON
or
Turn-OFF
transients.
2
illuminated
Speaker
Out
Like
ЕМ-1001,
but
O
VU
—70
W.
INDICATOR
(S)
SU
motors
0
VO
DE
watts
Like
EM-100ll,
but
OVU=38
W|Like
EM-100lI,
but
ovU=43
w]
2
tluminated
Monitor
VU
PHYSICAL
DIMENSIONS
WXHXD:
SPEAKER OUT.
LOW-E
CHANNEL EQUALIZATION
GRAPHIC EQUALIZATION
{Speaker Outputs)
+12 dB max. at 63 Hz, 125 Hz, 250 Hz, 500 Hz,
1 kHz, 2 kHz, 4 KHz, 8 kHz & 16 kHz; "flat" at center detents.
= + *1
into
8
ohms.
meters,
Cine
dB
into
62.1х22.9х63.1ст
(22х8%х20") (2412 xX 9X 2474")
Weight:
24.5
kg
(54
Ibs.)
28
kg
(61.7
Ibs.)
FINISH
.
|
Black,
with
protective
aluminum
trim.
WARRANTY
Limited,
one
(1)
year
on
parts
&
labor,
SPEAKER OUTPUT PERFORMANCE
POWER OUTPUT/CHANNEL
(Measured at 0.5% THD point;
continuous RMS voltage
squared/load; both channels
driven.)
78.7 X22.9X63.1cm
(31X9X 24%")
35 kg (77.2 Ibs.)
56X17.1X 47 cm
(22 X6% х 18/2")
16 kg (35.3 Ibs.)
56X21.4X 50.8cm
50
watts
into
8
ohms
75
watts
into
8
ohms
85
watts
into
8
ohms
140
watts
into
8
ohms
1
kHz;
45
watts
into
8
ohms
|@
1
kHz;
65
watts
into
8
ohms|
1
kHz;
75
watts
into
8
ohms|
1
kHz;
120
watts
into
8
ohms
@
20
Hz
to
20
kHz.
@
20
Hz
to
20
kHz.
(
20
Hz
to
20
kHz.
@
20
Hz
to
20
kHz.
+1 dB, 30 Hz to 15 kHz,
+1 dB, —3 dB, 20 Hz to
20 kHz, at 25 watts output
into 8 ohms.
Less
than
0.2%,
@
1
kHz
|
|
(45
W/8
ohms);
Like
ЕМ-1001,
but
measured
|
Like
ЕМ-1001
but
measured
|
Like
ЕМ-1001,
but
measured
Less
than
0.596,
20
Hz
to
at
65
watts
output.
at
75
watts
output.
at
120
watts
output.
20 kHz (45 W/8 ohms).
+1 dB, 20 Hz to 15 kHz,
+1 dB, -3.dB, 20 Hz to
30 kHz, at 40 watts output
into 8 ohms.
Like EM-200B, but measured
at 80 watts output.
Like EM-100N, but measured
FREQUENCY RESPONSE at 35 watts output.
TOTAL HARMONIC
DISTORTION (THD)
INTERMODULATION
Less
than
2551
0
Hza
7
KHz
Like
ЕМ-1001,
but
measured
|
Like
ЕМ-1001,
but
measured
|
Like
ЕМ-1001,
but
measured
DISTORTION
(iM)
mixe
А
ohms)
atts
Into
at
35
watts
output.
at
40
watts
output.
at
60
watts
output.
—40
dB*
зв
dB*
—37
dB*
POWER
AM
SEs
(MASTER
VOLUME
max.)
|
(MASTER
VOLUME
max.)
(MASTER
FADER
max.)
(ONE
INPUT
VOLUME
max.)
(ONE
INPUT
VOLUME
max.)
(ONE
INPUT
FADER
max.)
OUTPUT
NOISE**
(MASTER
VOLUME
max.)
(ALL
INPUT
VOLUME
min.)
(MASTER
FADER
max.)
(ALL
INPUT
FADER
min.)
EQUIVALENT
INPUT
|
NOISE**
(UNBALANCED
|
—118
dBm.
VERSION)
EQUIVALENT INPUT
NOISE**
(BALANCED
—118
dBm.
VERSION)
.
MONITOR OUTPUT PERFORMANCE |
FREQUENCY
RESPONSE
+1
dB,
30 Hz
to
15
kHz;
+1
dB,
~3
dB.
20
Hz
to
30
kHz.
+1
dB,
20
Hz
to
15
kHz;
+1
dB,
—3
dB,
20
Hz
to
30
kHz.
|
TOR
TON
(HIS)
Less
than
0.2%
8
1
kHz:
Less than
0.5%,
20
Hz
to
20
kHz,
(at
+10
dB*
into
10
kohms).
INTERMODULATION
T
DISTORTION
(IM)
EQUIVALENT
INPUT
NOISE**
OUTPUT NOISE**
*0 dB is referenced to 0.775 V RMS. |
О
**
Measured
with
a
6
dB/octave
filter
&
12.47
kHz;
equivalent
to
а
20
kHz
filter
with
infinite
dB/octave
attenuation.
6
Less
than
0.5%,
70
Hz
& 7
kHz
mixed
4:1
(at
+10
dB*
into
10
kohms).
—118 dBm. _
Master
volume
at
maximum
&
all
Input
volume
controls
at
minimum;
d
one
Input
volume
control
at
maximum.
—71 dB*,
—64 dB* Master volume an

Connector
in Mixer**
Actual
Load
For
Use
w/Nominal
Input
Level
Impedance
|
_Nominat
|]
Max.
Before
Clip
HI-Z LO-Z HZ
CHANNEL
1
kohm
20
kohms
150—600
ohms
3
k—
10
kohms
—50
dB
(2.5
mV)
—22
dB
(6.2
mV)
INPUTS
1
kohm
20
kohms
150—600
ohms
3
k—10
kohms
—40
dB
(7.8
mV)
—12
ав
(193
mV)
XLR-3-31
(1—6,
8
or
12)
1
Корт
20
kohms
150—600
ohms
3
k—
10
kohms
~35
dB
(14
mV)
—7
dB
(346
mV)
and
Phone
(UNBALANCED
1kohm
20
kohms
150—600
ohms
3
k—
10
kohms
—30
dB
(25
mV)
—2
dB
(616
mV)
jack
(XLR
is
VERSION)
1
Копт
20
kohms
150—600
ohms
3
k—
10
kohms
—20
dB
(78
mV)
+8
dB
(1.93
V)
unbalanced)
1
20
kohms
150—600
ohms
3
k—10
kohms
+4
dB
(1.23
V)
+32
dB
(31
V)
HI-Z LO-Z НІ-2
CHANNEL
1
kohm
20
kohms
50-600
ohms
3
k—10
kohms
—50
ав
(2.5
mV)
—22
dB
(6.2
mV)
|
INPUTS
1
kohm
20
kohms
50—600
ohms
3
k—10
kohms
—40
dB
(7.8
mV)
—12
dB
(193
mV)
XLR-3-31
(BALANCED
1
kohm
20
kohms
50—600
chms
3
k—10
kohms
—35
dB
(14
mV)
—
7
dB(346
mV)
and
Phone
OPTION
ON
1
kohm
20
kohms
50—600
ohms
3
k—10
kohms
—30
dB
(25
mV)
—2
dB
(616
mV)
jack
(XLR
is
EM-150118,
EM-
1
kohm
20
kohms
50—600
ohms
3
k—
10
kohms
—20
dB
(78
mV)
+8
dB
(1.93
V)
balanced)
200B,
EM-300B)
+4
20
kohms
хх»
3
k—10
kohms
+4
dB
(1.23
V)
+32
dB
(31
V)
ECHO
RETURN
|
юм
|
soms
—
|
-3odBgsmv)
|
Phone
ac
14
dB[
28V)
*EM-100H
and
EM-1501IB
offer
only
these
switch
settings;
EM-200B
and
EM-300B
offer
all
settings
except
“—
35".
**All
connections
are
unbalanced;
XLR
CHANNEL
IN
connectors
may
be
balanced
(floated)
with
optional
plug-in
transformer
modules
(except
EM-1001I).
***Do
not
use
LO-Z
XLR
Input
when
Input
Level
Switch
is
in
+4
position
and
transformer
option
is
installed;
HI-Z
phone
jack
input
may
be
used.
****
Not
provided
on
EM-1001I.
OUTPUT CHARACTERISTICS
——— E)
in Mixer**
Actual Source For Use w/Nominal
Impedance Max. Before Clip
SPEAKER
OUT
(LR)
8
ohms*
W/ch
TOTAL
0.13
ohms
8
ohms
N/A
50W
100W
|
.
75W
150W
Phone
jack
0.065
ohms
8
ohms
N/A
85W
170W
140
W
280
W
600
ohms
О
dB
(775
mV)
390
ohms
10
kohms
+4
dB
(1.23
V)
+18
dB
(6.2
V).
|.
|
Phone
jack
390 ohms 600 ohms О dB (775 mV) +14 dB (3.9 V)
EM-300B
10
kohms
+4
dB
(1.23
V)
+18
dB
(6.2
V)
MONITOR
OUT
(LR)
600
ohms
О
dB(775
mV)
+14
dB
(39
V)
|
MONTOROUTEA)
|
MN
10
kohms
+4
dB
(1.23
V)
+18
dB
(6:2
V)
Phone
jack
GRAPHIC
EQ
OUT (LR)
|
|
600
ohms
0
dB
(775
mV)
+14
dB
(3,9
V)
EM-150IIB
390
ohms
10
kohms
+4
dB
(1.23
V)
+18
dB
(6.2
V)
|
Phone
jack
EM-200B
390
ohms
600
ohms
O
dB
(775
mV)
+14
dB
(39
V)
EM-300B
10
kohms
+4
dB
(1.23
V)
+18
dB
(6.2
V)
ECHO
SEND
72048
(78
nV
T6
dB
030)
ЕМ-1001
ЕМ-1501В
EM-200B
EM-300B
LINE OUT (L,R)
EM-1001I
EM-150IIB
EM-200B
+14 dB (3.9 V)
PHONES
ЕМ-1001
130
ohms
8
ohms
.
N/A
О
dB
(0.775
V)
ЕМ-1501В
EM-300B
150
ohms
+2
dB
(0.98
V)
EM-200B.
*Power
output
is
measured
at
1
kHz
into
specified
load,
both
channels
driven.
The
watts/channel
figure
is
the
output
of
one
channel,
whereas
the
total figure is the sum of both channels' power output.
**All connections are unbalanced.
Phone jack
(stereo)
Specifications subject to change without notice.

SECTION Two |
Introduction
The
Yamaha
EM-1001I!,
EM-15011B,
EM-200B
and
inputs
and
outputs;
and
graphic
program
equalization.
EM-300B
are
multi-input,
stereo
output
mixers
with
Patchable
inputs
and
outputs
to
each
major
function
built-in
power
amplifiers
and
Accutronics
reverb
units.
provide
the
flexibility
of
separate
components
with
They
are
compact
and
functional
in
design,
with
many
the
convenience
of
one
compact
unit.
Complete
tonal
full-performance
features:
switchable
sensitivity,
two-
control,
substantial
output
power,
tremendous
band
equalization,
pan
pot
and
dual
monitor
sends
on
versatility
and
proven
Yamaha
reliability
make
the
a
every
input;
separate
master
level
controls;
auxiliary
EM-Mixers
exceptionally
good
values.
EM-300B
EM-150IIB
EM-100II
EM-200B

Inputs `
The EM-10011 and EM-15011B each have 6 input
channels, while the EM-200B has 8, and the EM-300B
has 12 input channels. Each input channel includes the
following controls: Fader, Hi-EQ, Low-EQ, Monitor 1
(which usually serves as the Reverb/Echo Send control),
Monitor 2, stereo Pan, and an Input Level switch,
Auxiliary Inputs
АП EM-Mixers have one stereo auxiliary input circuit
(Aux In) plus three mono auxiliary inputs (Monitor
Sub In 1, Monitor Sub In 2, and Echo Return).
Monitor & Speaker Outputs
The Monitor and Speaker Outputs are controlled by
separate Master faders that independently adjust the
level from the program and monitor mixing buses. The
Speaker Output level is displayed by two VU Meters.
(Monitor meters are also provided on the EM-300B.)
Linking Mixers & Recording
Two or more mixers may be linked or “chained”
together to increase the total input capacity. For this
purpose, the Line Out jacks of one mixer would be
connected to the Aux In jacks of the next mixer.
Alternately, the Line Out jacks may be used to feed
a stereo tape recorder.
The Echo Send jack may also be used to feed a mono
tape recorder, or other external device; this will not
affect the function of the internal spring reverb.
Likewise, the Monitor Out jacks may be used to feed
tape recorders, remote lines or other high-impedance
devices. Remember that Monitor 2 does not reflect the
program mix. It is fed "pre-fader and pre-EQ", so it can
be mixed for its own unique channel-to-channel balance
without regard to the stereo program mix.
Graphic Equalizers (Not on EM- 10011)
The EM-Mixers' Graphic Equalizers are a unique tool,
both for reducing acoustic feedback and for imparting
limitless tonal characteristics to the Speaker outputs.
Seven or nine linear controls “outline” any frequency
response curve as it is created (hence, the term
graphic"). There are separate equalizers for each
(Left and Right) program channel. The Graphic
Equalizers do not normally affect the Monitor outputs,
so corrections made for the “house” sound will not
color the sound on stage. The Headphone jack does
carry the graphically equalized program, as do the
MoocooucocoR
|
|
|
|
|
|
|
| |
|
8
8
7
апа
9
Вапа
Graphic
Equalizers
G-EQ Output jacks, which сап be used to drive external
amplifiers. Alternately, the Monitor Outputs can be
patched into the С-ЕО Inputs, while the Line Outputs
are fed to an external amplifier/speaker system.
Power Supply
The power supply is grounded and has convenient
rear panel fusing for complete safety. The polarity-
reversing power switch has two “ON” positions that
help to minimize hum in certain instances. (Illuminated
VU meters indicate that Power is “ON’’.)
Flexibility
The many inputs and outputs on EM-Mixers simplify
set-up, increase their inherent flexibility, and safeguard
against possible malfunctions by serving as alternate
signal paths. If you're not sure whether a particular input
or output is appropriate, try it, with this one warning:
CAUTION: NEVER PLUG THE SPEAKER OUTPUT
INTO ANYTHING BUT A SPEAKER LOAD OR A
DIRECT BOX MADE FOR HIGH POWER LEVELS,
AND NEVER PATCH AN OUTPUT DIRECTLY BACK
TO A CHANNEL INPUT UNLESS DIRECTED TO DO
SO BY THIS MANUAL.
This simple precaution will protect your Mixers and
related equipment — failure to observe this caution may
void the Mixer Warranty.