Yamaha EM-95 User manual

YAMAHA
INTEGRATED
MIXER |
ЕМ-ЭЭ
OPERATING MANUAL
TREBLE
LINE INST LINE INST LINE INST LINE INST MIC LINE
INST
LINE /PHONO
YAMAHA
ECHO VOLUME
INTEGRATED MIXER
EM SERIES MODEL
MASTER
95

This instruction manual was prepared to assist you in getting the most out of your EM-95. While you may already have
begun using the unit, we urge you to read this manual thoroughly, and to re-read it as you become more familiar with the
EM-95's features and functions.
WARNING: To reduce the risk of fire or electric shock, do not expose this appliance to rain or moisture. ar
TABLE OF CONTENTS
INTRODUCTION ......................... 1
SPECIFICATIONS .............«. «ххх ххэ 2
BRIEF OPERATING INSTRUCTIONS
FRONT PANEL ............... «үхэхээ 3
REAR PANEL ................... «хээ 5
GETTING THE MOST FROM THE BUILT-IN
ANALOG DELAY LINE ..................... 7
SETTING ОР... 7
APPLICATIONS .......................... 8
BLOCK DIAGRAM ................. ee 10
INTRODUCTION
The Yamaha EM-95 is an integrated mixer | шин |
with a built-in power amplifier, 195 milli- m NS ч ЖА ЖА | masenog
second analog delay line, and RIAA phono | dew | э Л
preamp. There аге five regular mic/instru-
ment/line input channels. Each of these
channels has a two-frequency equalizer, an
echo (delay) send, a 3-position input
selector for use with mics, instruments and
lines, and a rotary volume control.| A sixth
input channel is switchable for either of
two auxiliary line inputs or a phonograph
input (mono or stereo). The mixer's solid state power amplifier
delivers 65 watts (RMS) into 8 ohms or 100 watts into 4 ohms, and there are two parallel speaker outputs,
each having both a phone jack and push-terminals. This provides the greatest compatibility, speed and ease of set up. There
are also line output and recorder output jacks for feeding additional amplifiers, other mixers, tape recorders, and so forth.
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NO TE: {п this manual, where a specific signal level i is described in dB, Оав
is referenced to 0. 775 volts RMS.

SPECIFICATIONS
GENERAL SPECIFICATIONS
MAXIMUM OUTPUT POWER 100 watts into 4 ohms, or
65 watts into 8 ohms, continuous average sine wave (НМ5).
FREQUENCY RESPONSE + 1dB, 30 Hz to 10 kHz or
. | +1, —3dB, 20 Hz to 20 kHz, (BOW, 49)
(950 watts into 4 ohms.
TOTAL HARMONIC Less than 0.5% 50 Hz to 15 kHz,
DISTORTION (THD) Less than 0.296 91 kHz,
(950 watts into 4 ohms.
INTERMODULATION Less than 0.5%, (70 Hz : 7kHz = 4 : 1)
DISTORTION @50 watts into 4 ohms.
* HUM and NOISE ** _116dB Equivalent input noise;
(20 Hz to 20 kHz, —38dB residual output noise, Master Volume
150 ohms source) and one Input Volume at max.
—42dB residual output noise, Master Volume at max
and all Input Volume controls at min.
MAXIMUM VOLTAGE GAIN 77dB, Channel In to Speaker Out.
(Input Selectors set 51dB, Channel In to Line Out.
at Mic position). 47dB, Channel In to Record Out.
52dB, Aux In, Tape In to Speaker Out.
77dB, Phono In to Speaker Out.
48dB, Line to Speaker Out.
EQUALIZATION BASS + 12dB $100 Hz, shelving.
TREBLE + 12dB @10 kHz, shelving.
CROSSTALK —60dB @1 kHz, adjacent inputs.
ANALOG DELAY LINE 70 to 195 milliseconds, continuously variable,
and with variable feedback,
POWER REQUIREMENTS US & Canadian models 120 volts, 50/60 Hz
General model 110, 130, 220 or 240 volts, 50/60 Hz
POWER CONSUMPTIONS US & Canadian models 160 watts
General model 270 watts
DIMENSIONS | 500mm W x 225mm D x 252mm Н
(19-11/16"W х 8-7/8"D x 9-15/16"H)
WEIGHT 13 kg (29 pounds)
* Compensated with a —6dB/octave filter 612.47 kHz.
** [n these specifications, OdB is referenced to 0.775 volts RMS.
INPUT CHARACTERISTICS
INPUTS (1 ~ 5CH)
MIC 150 ~ ЗКО, 一 50dB (2.5mV) 一 22dB (62mV)
INST | Sources -354В (14mV) 一 7dB (346mV) Phone Jack
LINE | | -204В (78mV) + 8dB (1.93V)
INPUTS (CH6)
PHONO mag. cart. 一 50dB (2.5mV) --224В (62mV) 2 x Pin Jack
LINE БКО, | —20dB (78mV) + Вав (1.93V) Phone Jack
FUNCTION INPUTS |
AUX IN 5КО —20dB (78mV) Phone Jack
TAPE IN БКО —20dB (78т\/} 2 x Pin Jack
OUTPUT CHARACTERISTICS
， 49 100W Phone Jack
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LINE OUT ' 1009 10КО & up 048 (775mV) Phone Jack
REC, OUT | 2.2КО ` 10kQ & up -OdB (775mV) Pin Jack
In these specifications, OdB is referenced to 0.775 volts RMS.
Specifications are subject to change without notice,

BRIEF OPERATING INSTRUCTIONS
NOTE: Make all signal and speaker connections before turning on the AC POWER switch.
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FIG. 1. FRONT PANEL 11111 |
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INPUT CHANNEL (Typical of Input channels 1 through 5)
Q INPUT
This 1/4" (6.3 mm) tip-sleeve phone jack accepts signal for the channel input. The inputs are un-
balanced.
VOLUME
This control sets the channel's mix level.
© INPUT LEVEL Selector Switch
This slide-switch adjusts the input Jack's sensitivity for best results with different input sources.
"Line" position is for tape machine outputs and high level synthesizers with nominal —20 dB out-
put level. “inst” position is for guitars, electric pianos, and other keyboards with nominal —35 dB
output level. "Mic" position is for high or low impedance microphones with nominal —50 dB out-
put level.
Ө BASS and TREBLE
Two knobs per input channel allow +12 dB of equalization (tone control), with “flat” response at
center position. The knee of the EQ curve is 100 Hz for the Bass control, and 10 kHz for the Treble
control.
Ө ECHO | | |
` This knob. feeds the mix bus that drives the built-in analog delay tine. The feed is post-EO and
Volume controls. |

BRIEF OPERATING INSTRUCTIONS
LINE /PHONO CHANNEL
Note: Phono input jacks for this sixth channel are located on the EM-95 rear panel.
@ LINE
Input jack for line input only.
@ VOLUME
This control sets the Line input or Phono input mix level.
Q LINE/PHONO Selector Switch
Switch to select either Line or Phono for Channel 6 input.
* The EM-95 is monaural. Even if a stereo source is used the output will be in mono.
O BASS and TREBLE
These two knobs are identical to the input channel EO controls, except they affect only the selected
auxiliary input source.
MASTER CONTROLS
@ FUNCTION Switch .
Selects the mixed output of channels 1 — 6, the Aux input, or the Tape input as the output of the
EM-95. When the switch is in the Aux or the Tape position, the LED lights.
*When this switch is in the Aux or the Tape position, the signals input to channels 1 — 6 are not
output.
* The EM-95 is monaural. Even if a stereo source is used the output will be in mono.
Ф FUNCTION VOLUME
Sets the volume level for signals from the Tape and Aux inputs. When these inputs are not being
used, set the control to “0”.
Ф ECHO VOLUME |
This control sets the level of the signal from the built-in analog delay line that is mixed back with
the “direct” sound in the Speaker, Record and Line outputs. (It is an echo return control.)
® DELAY TIME
This control continuously varies the length of delay from 70 to 195 milliseconds.
(D FEEDBACK
This control adjusts the amount of output from the delay line which is mixed back into the delay
circuitry. Increasing the amount of Feedback lengthens the duration of an echo. If Feedback is set
high
enough,
oscillation
(howl
or
run-away
echo)
can
occur.
This
undesirable
condition
can
be
remedied by lowering the Feedback setting.
(p MASTER
This control adjusts the level at the Speaker outputs and the Line output, but does not affect the -
Record output level. ` |
Ф POWER Switch and Indicator
A rocker switch turns the AC power On and Off. The red pilot lamp above the switch is On when
` power is Оп. |

BRIEF OPERATING INSTRUCTIONS
FIG. 2. REAR PANEL
REAR PANEL
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US and Canadian Models
Q POWER CORD
This 3-wire cord is for connection to any 120 volts AC, 50 or 60 Hz grounded outlet of US &
Canadian models, and to any one of 110, 130, 220 and 240 volts AC, 50/60 Hz of General model.
@ SPEAKER OUTPUTS 1 &2
There are two sets of parallel-wired speaker outputs (#1 and #2), each of which has a 1/4" (6.3mm)
tip/sleeve phone jack and a pair of push-terminals. If a phone jack is used, the associated push
terminals are automatically disconnected from the amplifier. The minimum overall load impedance
is 4 ohms.
When a single 4 ohms speaker is connected to either the #1 or #2 output, the amplifier will deliver
up to 100 watts continuous average (RMS) power. When a single 8 ohms speaker is connected to
either the #1 or #2 output, the amplifier will deliver up to 65 watts continuous power. If using a
pair of 8 or 16 ohms speakers, connect one each to the #1 and #2 outputs. We recommend using 18
gauge "zip cord" or even heavier wire; strip 1/3'' of insulation, twist the strands, press in the tab on
the speaker output terminal, insert the bared wire in the center hole, and release the tab.
| CAUTIONS
1. Do not connect more than one 4 ohms speaker to the mixer since the amplifi-
er will be overloaded.
2. 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 t to an
input unless directed to do so by this manual.

BRIEF OPERATING INSTRUCTIONS
© LINE OUT
This unbalanced 1/4" (6.3 mm) tip/sleeve phone jack carries the mixed signal from all the input
channels, including the auxiliary input, and from the delay line. The level is controlled by the
` Master volume control, and is nominally О ав. This jack is designed for medium to high impedance
inputs, such as other mixers, power amplifiers, or tape recorders.
@ REC OUT |
This pair of RCA-type pin jacks (phono jacks) both carry the same signal, which differs from the
Line output in that it is not affected by the Master volume control.
Record Out has a nominal level of —3 dB, and is designed to feed high impedance line inputs such as
tape recorders or power amplifiers which have their own volume controls. Use one jack to feed
single-channel equipment, or both jacks to feed dual-channel equipment (or two different pieces of
single-channel equipment).
Ө AUX IN and TAPE
The EM-95 is provided with an Aux In phone jack and a Tape phono jack, to allow the mixer to be
used with a variety of equipment. A front panel Function switch selects either the Aux In signal or
the Tape signal. An FM tuner, a second tape deck, or some other audio component can be connect-
ed.
Q PHONO
This input is a pair of RCA-type pin jacks that are intended for direct connection of a magnetic
phonograph cartridge. The jacks are mixed internally, via isolation resistors, to mono, and feed a
built-in RIAA preamplifier. Thus, the Phono Input is suitable for inputs from mono or stereo
cartridges, but should not be used with a microphone or other source. The Phono input is “live”
only when the front panel channel 6 input selector switch is set to "Phono" position. Nominal
sensitivity is —50 dB, with an actual input impedance of 47 kohms.
NOTE: Even if only one of the two Phono inputs is used, both of the supplied shorting plugs
should be removed.
A ground post is located above the input jacks, and should be used to ground the phonograph
chassis to the mixer chassis to reduce hum. Unscrew the knurled sleeve, and slide a stripped end of
the ground wire through the hole in the center post. The other end of the wire should be connected
to the phonograph chassis. |
VOLTAGE SELECTOR
The line voltage selector on the rear panel selects one of four regulating positions for each
nominal line voltage. To select the correct nominal line voltage and selector position, refer to
Table 1.
VOLTAGE
SELECTOR
T
|
|
2 t
^
CD
If
voltage
—
110%,
115%
|120V,
125V,
127УЧ
|
220V,225V
|230V,
240V,
250V
M
0
In
your
area
Is:
Set voltage 110V 130V 220V | 240V `
selector to: .
. Table 1
CAUTION: THIS EQUIPMENT MAY BE DAMAGED IF OPERATED WITH THE LINE
VOLTAGE SELECTOR SET TO AN INCORRECT POSITION.

GETTING THE MOST FROM THE BUILT-IN ANALOG
DELAY LINE
WHAT IS AN ANALOG DELAY LINE ?
An analog delay line is an electronic circuit that provides echo and related effects by slowing down audio signals---a more
capable space-age. alternative to older style tape-loop echo machines and reverb springs. The term "analog" means that the
audio signal retains its original voltage levels throughout the electronics. Since there are no moving parts in the delay, `
maintenance is unnecessary. Moreover, the normal shocks or vibration encountered in touring and in high sound level
environments do not affect the sound.
ECHO AND REVERB EFFECTS ?
"Echo" and “reverb’’ are often confused with one
another, and there is some overlap in their definitions.
Generally speaking, "echo" consists of one or more
distinct, delayed sound images with recognizable attacks.
“Reverb” also consists of multiple delayed sound images,
but they smear together and have no discretely discern-
able attacks.
To get a single echo from the delay line, set the Feedback
control at zero, and adjust the time delay as desired. For
multiple echoes, turn up the Feedback control. If the
input program has little or no sharp musical attacks (i.e.,
legato string lines or melodic vocal backups), then the
multiple echoes with a long delay time can sound like a
reverb, When there are more sharp attacks and decays in
the program material, the effect will be more repetitive.
MANUAL PITCH BEND WITH FEEDBACK ?
It is possible to obtain changes in pitch (frequency) by
using the delay line! Simply set the Feedback at about #5,
and vary the Delay Time up and down between #0 and
#10, or anywhere on the scale. 1f you move the Delay
control up or down and then hold it at the new setting,
the pitch will increase or decrease, then stay constant
until the delay dies out or a new sound is introduced.
SETTING UP
Before turning on the mixer's AC power switch, connect
all inputs, outputs and speakers, and be sure the Feedback
control is at #0. If other electronic equipment or electro-
nic instruments are connected to the ЕМ-95" inputs, turn
on that equipment before turning on the mixer. This will
not only avoid annoying hum, it will help prevent turn-on
transients from damaging speakers or other equipment.
Set the input Line/Inst/Mic selector switches (Line/Phono
selector on channel 6) to complement the type of device
that is plugged into the Input Jack below. If the AUX IN
or TAPE input is to be used, set the CH1 ^ 6/AUX IN/
TAPE selector as appropriate (if neither is used the switch
setting should be CH1 ^ 6 and the FUNCTION. volume
set at minimum). |
various effects).
FIG. 3. ECHO/REVERB DELAY CONTROL SETTINGS.
INTEGRATED MIXER
YAMAHA eu SEES ноос, ТЭЛЭЭ
Set in shaded area Тог multiple
echos, or at "O'' for a single echo.
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POWER
Set as desired for a short or
long delay.
FUNCTION
Adjust to balance total echo
effect proportion to overall
program mix.
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Set at approximately this
range. Do not adjust during
the effect.
Move control up and down to
achieve pitch shift.
Adjust as desired, usually toward
high end of control scale.
ECHO VOLUME Masten
If runaway Feedback (Howling) should occur, immediate-
ly turn down the EM-95 Feedback control.
Initially, set the channel Volume controls at #0, and the
Master volume control at about #3. Turn all channel Echo
controls and master Echo Volume to #0, and center the
Bass and Treble controls. One channel at a time, bring up
the Volume controls until the desired mix balance is
achieved; these volume controls should be set somewhere
between #5 and #8. Then, if the overall volume is too
low or too high, readjust the Master volume accordingly.
Once the overall volume and balance are thus set, adjust
the Bass and Treble controls as desired.
If you want to add echo effects to one or more channels,
first set the master Echo Volume control at about #5.
Then set the channel Echo controls to between #0 and
#10, depending on how much effect you want each
channel to contribute, Now experiment with the delay
time and feedback controls to achieve the effect quality
you want. (See FIG. 3 and 4, and the associated
descriptions for suggested starting points to achieve
Finally, readjust the Echo Volume
control as required,

APPLICATIONS
FIG. 5. USING THE EM-95 FOR A VOCAL SOUND REINFORCEMENT SYSTEM.
EM-95 (FRONT PANEL) (REAR PANEL)
VOCALIST
MICROPHONES
SELF-POWERED
SPEAKER
(A4115H)
SPEAKERS
* Optional
Use external amp for house speaker and
EM-95 amp for stage monitor.
FIG. 6. USING THE EM-95 FOR A SOLO PERFORMER SOUND REINFORCEMENT SYSTEM.
EM-95 (FRONT PANEL) (REAR PANEL)
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ANOTHER
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INSTRUMENT
MICROPHONE
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RHYTHM MACHINE
TAPE RECORDER PHONOGRAPH
(for making reference (for background
recording) music between sets)

APPLCATIONS
FIG. 7. USING THE EM-95 FOR A KEYBOARD SOUND REINFORCEMENT SYSTEM.
ЕМ-95 (FRONT PANEL} (REAR PANEL)
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SYMPHONIC
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SPEAKER
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FIG. 8. USING THE EM-95 FOR AN INSTITUTIONAL PUBLIC ADDRESS SYSTEM.
From film projector line output.
(To amplify projector sound.)
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(FRONT PANEL) (REAR PANEL)
MICROPHONES
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SPEAKER
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(Do
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switch
so
output
PLAYER
is
derived
from
input
source.)
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