Shure 706 User Manual
POW
LI,
'ER
h
COP
The Features
...
you find most useful.. . pre-fader monitor.. ,200-watt
power amp.. .exclusive FEEDBACK FINDER'" and
PATCH BLOCK'"
The Reliability
...
you need for demanding, continuous operation
The Quality ...
you've come to expect from Shure
CONTENTS
Introduction..
Controls Connectors Indicators
Input Channels
Aux Inputs
Status Indicators
Headphones
DB Peak Indicators
FEEDBACK FINDERT"
Graphic Equalizer.
Master Controls
Speaker and Power Panel
PATCH BLOCK'" Rear Panel
Setups
........................................
Operation
Maintenance
Troubleshooting
Specifications
Speaker Systems
Speakers and Accessories
Guarantee
Shipping Instructions
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WARNING
To prevent a source of fire or electric shock, do not
expose this appliance to rain or extreme moisture.
Introducing the Shure
PRO
MRST€RTM Power Console Model
706
.
.
.a portable, high -power, 8-input monophonic mixeramplifier combining the power and versatility
demanded by professional users with the ease of
operation of a much smaller, simpler unit. The result of
years of design concept study and evaluation, the
PRO MASTER handles any sound job dependably,
and with the very highest quality. It combines superior
performance with a relatively modest price. It is ideal
for such diverse applications as schools, churches,
hotel and motel meeting rooms, nightclubs, auditoriums-anywhere good sound is vital, regardless
of room size. simultaneouslv
The PRO MASTER is an all solid-state unit, employing
'the latest developments in highly reliable integrated
circuit, discrete component, and printed wiring
technology It's easy to set up and operate-no
rate power amps, equalizers or reverb are required.
And connecting accessory equipment is fast and
convenient.
The PRO MASTER is full of features for super
performance and super convenience-the unique
FEEDBACK FINDER'" helps maximize gain before
feedback, makes feedback location and suppression
fast and easy.. .exclusive PATCH BLOCK'" rear panel
shows you where
complex circuits using simple patch cords.. .efficient
"wind tunnel" power amp design has temperature
warning and shutdown LED indicators.
Its versatile control panel is human-engineered for
ease of operation: an experienced user can always
get the most from it, even in the dimmest auditorium,
meeting room, or club, and a beginning user can
operate it effectively, with minimum indoctrination and
with complete confidence. It's packaged in a handsome, rugged, lightweight, molded
case complete with carrying handle and line
cord storage.
In combination with Shure's PRO MASTER Speaker
Svstems, vou've aot a sound reinforcement svstem
tiatat's ide'al for every application. Need more bapability? The PRO MASTER is super-expandable-use
accessory mixers or power amps, stage monitor
speakers, effects devices, whatever you need can
easily be added. And it's all backed by Shure's traditional quality and reliability. It's the sound you need
;.
.when you need it.. . and where you need it.
you're patching, helps you construct
ARMO-DUR@
sepa-
Just look at these features-
Full 200-watt power amplifier
Six high-impedance and six balanced low-
impedance mic inputs
and PA (power amp) inputs
Six input channels for microphones and aux level
sources with full controls: volume, attenuation,
quency equalization, effectsheverb, and monitor
High- and low-impedance inputs may be used
Two additional aux channels with volume controls
Full master controls: monitor, volume, effects send,
reverb return, and reverb high- and low-frequency
eaualization
Outputs for all needs: monitor, effects, headphones,
aux, mic, and speakers (2)
Two common mix buses: mix output and equalizer
out~ut
Balanced mic output for "house" systems
Unique FEEDBACK FINDER with LED readout
instantly identifies feedback frequency bands
10-band graphic equalizer with minimum phase,
combining-type filters. Lowest filter is -12 dB/
octave cut-only switch; others are
Exclusive PATCH BLOCK rear panel shows you
where to patch-jacks are located right in the block
diagram
Built-in reverb unit with provisions for external onloff
switching and external effects devices
Regulated 24 Vdc simplex supply for powering
condenser microphones
Bright red
power amp peak output level, power amp overload,
power-on, temperature warning, and shutdown
m
Protected against damage from open- or shortcircuits on inputs or outputs
Protected against heat damage by ultra-reliable
cooling fan and automatic thermal shutdown circuit
Protected against radio frequency interference and
line noise
Operates on as low as 100 Vac (at reduced output)
Rugged molded ARMO-DUR case with carrying
handle and line cord storage
LED
plus
two aux inputs
213 dB adjustable
indicators show input clipping,
plus
EQ
fre-
Listed by Underwriters' Laboratories, Inc.; listed by
Canadian Standards Association as certified
Controls Connectors lndicotors
lnpl.Jt
Channels
(Orange marks on contios ~ndlcite hasic
or
nitiai settnnsi
Basically
MONITOR
Independently controls channel monitor level
to monitor output. Adjust for desired monitor
mix when using a monitor system.
EFFECTSIREVERB
Controls amount of reverberation and lor
external effects on channel. Adjust for des~red
amount (use low settings for vocals, higher
settings for instruments).
HI FREQ EQ
Sets channel treble boost or cut for desired
tone
LO FREQ EQ
Sets channel bass boost or cut for desired
tone shaping.
INPUT CLlP
Indicateswhen Input signal istoo high. Adjust
INPUT
noted.
INPUT ATTEN
Adjusts input attenuation for channel.
Suggested
phones or amplified instruments -12 to -30;
normal vocals
-24; distant
VOLUME
Allows individual setting of channel input for
desired signal mix. If setting is consistently
low (1 or
ATTEN.
.
. .
shap~ng.
ATTEN until only occasional flashes are
init~al sett~ngs: condenser micro-
-6
2),
or high
to -12; loud vocals
miking 0.
(8
to lo), adjust INPUT
-12
to
In oddition.
MONITOR
Control precedes VOLUME ("pre-fader") and
other channel controls; not affected by VOL-
EQualizers, or EFFECTSIREVERB. Only
UME,
affected by INPUT
independent monitor
EFFECTSIREVERB
This channel send control follows the INPUT
ATTEN, VOLUME and EQ controls. Can be
used simultaneously with reverb and external
effects devices, or as a second monitor
("post-fader") to the EFFECTS OUTPUT jack
HI FREQ EQ
Adjusts channel 213 dB at 10 kHz on all outputs except monitor; does not affect monitor
output.
LO FREQ EQ
Adjusts channel 2 13 dB at 100 Hz on all outputs except
output
INPUT CLlP
Lights approximately 3 dB prior to clipping
of preamp or input channel equalizer. For
optimum signal-to-noise ratio, adjust INPUT
ATTEN for occasional flashes (no light may
mean noisy operation; constant light means
distortion).
INPUT ATTEN
Adjusts gain of preamplifier to permit channel
to accept microphone level signals, direct
instrument pickups, or high level aux signals
from amplified instruments or tape recorders;
almost any input device can be
accommodated.
VOLUME
Affects all outputs except monitor; does not
affect monitor mix.
..
ATTEN, allowing totally
mix.
monltor; does not affect monitor
Inputs:
Both inputs may be used at the same time with
similar microphones (one high and one low
impedance), allowing up to 12 microphones
simultaneously.
HI IMP
Provides for connection of high-impedance
microphones, direct instrument pickups,
keyboards, amplified instruments, tape
recorders or other high-level sources to
channel input.
BAL LO IMP
Provides for connection of low-impedance
dynamic, ribbon or condenser microphones
and other low-level inputs to channel input.
(Don't use when high-level source is used on
HI IMP input.)
HI IMP
Can be used with line matching transformer
A95FP) to allow two low-impedance
(Shure
microphones on channel (not recommended
for two condenser microphones).
BAL LO IMP
Also may be used to power most condenser
microphones such as the Shure
~dc simplex power supply voltage
+24
activated by rear-panel switch.
SM81; built-in
I
Rux Inputs
Channels 7 and 8 are aux level inputs, providing additional input
capabilities for tape recorders, synthesizers, amplified instruments, background music sources, preamplified phonographs, or other mixers. These
channels have AUX INPUT phone jacks, VOLUME controls for
channel input mix level. To play a stereo tape in mono, connect the left tape
channel to AUX INPUT 7 and the right tape channel to AUX INPUT 8. If
equalization,
HI IMP input channels with proper input attenuation.
These inputs can also be used for the return signal from an external effects
dev~ce (delay, echo, etc.) driven by the EFFECTS OUTPUT
When an additional mixer (such as the Shure
connected to channel
submaster control
The orange control marks indicate basic or initial settings
LED
POWER-lnd~cates application of ac voltage to power supply when
rear-panel ON-OFF switch is turned on.
TEMP WARNING-Lights when unusually high temperature of 70°C
(158°F) is reached on the output transistors. Indication may be due to
blockage of air louvers, dirty air filter, or operating the console at a high
output level with a low load impedance (too many speakers or a
clrcuited output). Indicator will turn off when transistor case temperature
drops below 70°C. If indicator lights, it is advisable to identify the cause and
make corrections to avoid shutdown.
SHUTDOWN-When indicator is on, power amplifier is turned off (all other
circuits remain on). The console may shut down for one of the following
reasons:
WARNING),
(check forthiscondition by turning the consoleoff and turning it
(3)
airflow blockage due to fan failure or air passage obstruction.
reverbleffects and monitor are desired, use two of the first six
M68, M67 or SRIOI) is
7
or 8, the aux channel volume control becomes a
Stotus lndicotors
(I)
excessive temperature due to inadequate cooling (see TEMP
(2)
dc voltage on speaker lines due to power transistor failure
settlng the
short-
backon), or
POWER
TEMP
WARtjthiG
SHUTDOWN
HEADPHONES
I
I
-
Heo dphonss
A %inch phone jack is available for connection to a pair of stereo head-
phones. The jack is wired to the power amplifier. The signal level to the
headphones follows the MASTER VOLUME control. The headphones allow
the console to be used as a mixer for tape recording. The speakers can be
disconnected to avoid feedback.
Controls Connectors Indicators
Peak Indicatorsg
-
DB PCAH Indicators
Are connected to power amplifier outputs and
Indicate peak output level. 0 DB PEAK equals
approxlmately 25 watts to a 4-ohm load. A 6 dB
is a 4-tlmes power change; therefore.
change
-36 dB represents a 6
100W output. These Indicators are also used to
provide an instantaneous readout of feedback
frequency (see FEEDBACK FINDER). (Note that
when the FEEDBACK FINDER is activated, the
DB PEAK
band
the
signal level
indicators
indlcators-frequencies are shown below
equal~zer controls-and do not indicate the
)
Equalizer-
mW output and +6 dB a
are converted to frequency
FEEDBACK FINDERTM
PA (Power Amplifier)
Overload Indicator
L~ghts when the power ampllfler exceeds approx~mately
level (caused by clipping overload or any
Imperfect signal ampliflcatlon) The lndlcator 1s sensltlve to line voltage and speaker load
ally be corrected by
lndlcator remains on the speaker load may be Improper or a
the
speaker cable may be shorted
actlvatlon Under normal
+9
level of
dB on the DB PEAK ind~cator or
condltlons The overload condtioncan gener-
turnlng down the MASTER VOLUME control If
It may remaln on durlng SHUTDOWN
conditions
condition
th~s Indicator corresponds to a
200
result~ng ~n
watts to a 4-ohm load
Graphic Cqualizer
Is a 10-band fully comb~nlng m~n~mum-phase octave type normally
connected to the power
at 63 125 250 500 Hz 1
dB1octave cutoff fllter The graphic equallzer permits adjustment of
the sound system frequency response for a tonal balance
ate to the performance and a reduction In the tendency toward
feedback It can also be used to adjust an audio playback system
frequency response to compensate for
acoustical
materlal
response that can alter the natural sound of the recorded
ampl~fler Input It provldes 13 dB boost or cut
2 4 8
and 16 kHz plus a BELOW63 Hz 12
variations
in electrical and
1%
dlstortlon
approprl-
The graphlc equallzer can also be used to produce disco-type
sound by moderate amounts of low- and high-frequency boost
Note that
certaln amount of skill and tlme. It is preferable to use acommerc~ally
available
Equallzatlon Analyzer System, followed by feedback tunlng uslng the
bu~lt-in FEEDBACK FINDER and Indicators (see next section).
IMPORTANT Don't
unnatural and qu~te unpleasant sound
No Indicator
Hzfilter swltch, any low-frequency problems lhkely to be encountered
can be
63 Hz equallzer or move the
boomy' or
nolse are causlng power ampllf~er overload
Since the graphic equallzer controls may overemphasize or remove
desirable program
(~ncluding feedback) by careful m~crophone and speaker placement
before
equalizat~on by ear for proper sound qual~ty requires a
equalization analysls system such as the Shure M615AS
overequallze! Too much
1s provlded for eltherthe 63 Hzfllter control or BELOW 63
eas~ly removed by adjustment and lhstenlng tests Reduce the
~f
extremely low-frequency noises such as 'pop' or wind
materlal you should minlmlze acoustic problems
equallzlng
swltch to BELOW 63
equalization
(r)
can result In
~f
the sound is
3
FCCDf3ACH FINDQRTM
The FEEDBACK FINDER uses the LED lndlcators to provide a qulck and easy means of determlnlng
the freauencv (octave bandocation, of the most ~rominent feedback tones The ara~hic eaualizer can
then be usedto reduce the system response at these frequencies to suppress feedback Connect all
speakers and microphones and place them
controls and
lndlvldual Input channel controls to the lnltlal (orange mark) posltlons Turn the FEEDBACK FINDER
swltch to ON The DB PEAK lndicators are now connected for the feedback ind~cator functlon Adjust
the MASTER VOLUME to just below feedback If necessary turn down the FEEDBACK FINDER
THRESHOLD control from the 10
DB PEAK
frequency band with a lit LED Reduce the equalizer settlng in thls band untll feedback stops Repeat
the last two steps until the feedback sound becomes a
equal~zer control has been set to -10 IMPORTANT Don t overadjust the equal~zerl Too much equalizatlon can result In unnatural sound Wlth practlce the FEEDBACK FINDER can be used to equalrze for
feedback
When completed perform a
and
IMPORTANT This console has a
wlthout allowlng feedback to reach ear-spl~tting levels A clrcult at the power ampllfler Input limlts the
amplifier
FEEDBACK FINDER
When using the graphic equallzer for stage
system is performed after the house system and wlth the maln speakers off The monitor speakers must
be
In thelr f~nal
house system except use the
adjustments If more than one performer's microphone
stage mlcrophone
person must stand
excessive low-frequency signals are not usually deslrable for stage mon~tors, ~t may be advisable to set
equal~zer FLATIBELOW 63 switch of the monltor channel to BELOW 63, the 63 Hz control to -10, and
the
the 125 Hz control to
EQuallzer controls uslng the procedure
adequate level and
system lntell~g~b~lity may be improved if deslred by a sl~ght increaseof equal~zercontrols in the 1 kHz to
4
kHz range provldlng the deslred level can be maintamed w~thout feedback If feedback or ringing
1s encountered at any mlcrophone location try
nearest speaker
ind~vidual Input channel MONITOR. EFFECTSIREVERB and EQ controls to 0 Set all other
lndlcators Increase the MASTER VOLUME unt~l feedback just occurs and note the h~ghest
w~thout
subjecting
if necessary make sl~ght adjustments to the equal~zers to prov~de the most pleasing sound
to approxlmately 13% (26 watts) of full rated output To Insure full power operatlon the
swltch
operating
foroperat~on In thefeedbacksuppress~on procedure NOTE Dur~ng thls procedure a
In front of or hold (slmulatlng a performer) the mlcrophone belng equalized Slnce
-5
~ntelllglb~lity Make a s~m~lar check of all other mlcrophones belng fed to the mon~tor
pos~t~on to the point where room background noise does not lhght any
the aud~ence to ear-spl~tting feedback levels
lhstenlng test uslng program materlal s~mllar to the planned performance
power-l~miting feature whlch permits FEEDBACK FINDER operatlon
MUST
be returned to the OFF pos~t~on after setup
positions
Adjust the FEEDBACK FINDER THRESHOLD MASTER MONITOR and
relatlve to the mlcrophones used Use the same procedure as for the
lndlvldual MONITOR level and MASTER MONITOR controls for level
In thelr proper posltlons for the performance Set master
combination
monltor speakers, feedback
1s involved select the lead performer or center
previously
descr~bed Conduct a volce test and check for
adjusting
the positlon of and/or the dlstance to the
of a number of tones or until one
suppression
of the monltor
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