Shure 3200, A1200C, A1200MX, 1200 User Manual
Compact Modular
Sound Reinforcement System
CONTENTS
GENERAL DESCRIPTION
Features
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CONTROLS. INDICATORS
Input Channel Controls
Master Controls
Headphones
Indicators
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Powerswitch
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INPUTS. OUTPUTS. SWITCHES
Audio Inputs
Preamp Outputs
External Device Loop
Speakeroutputs
Reverb Defeat Switch
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Phantom Power Switch
Power
Fuse
SETUPS
OPERATION
DO'S AND DON'TS
TROUBLESHOOTING
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SPECIFICATIONS
BLOCKDIAGRAM
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THE SHURE AUDIOMASTERB SYSTEM:
Model 1200 Powermixer
Model 3200 Loudspeaker
Model A1
200MX Expansion Module
Model A1 200C Portable Case
CONGRATULATIONS! You have purchased the
Shure Model 1200 Powermixer, the finest compact
mixer-amplifier available today.
The Model 1200 Powermixer includes a flexible
microphone mixer with six inputs for high- or
impedance sources and a 200-watt power amplifier.
The 1200 is human engineered for ease of setup and
operation. Connection of microphones and other
equipment (tape recorder, equalizer, effects device,
remote amp) is fast and convenient.
The AUDIOMASTER
System,
1200 Powermixer and Model 3200
consisting of the Model
Loudspeaker(s),
works equally well for sound reinforcement or recording of music, vocals, or speech.
The Model 1200 Powermixer is rack-mountable or
portable; a high-power,
&input mixer-amplifier, expandable to 8 or 10 inputs, with famous Shure versatility and ruggedness. Inputs to the Powermixer accept
both high- and low-impedance microphones as well
as amplified instruments or other high-level sources.
Individual
Input Attenuation controls, with overload
indicators, are continuously adjustable to prevent
input overload. The Powermixer has bui It-in reverberation with individual channel and overall level
adjustments. Other effects devices or an equalizer
are easily connected via a post-Master control program loop. An integral power amp Limiter prevents
overload distortion over a wide input signal range.
Pre-Volume Monitor send controls and a pre-Master
Volume Tape Output provide maximum usefulness
in performance or recording applications. The control panel is human-engineered with color-coded
knobs for error-free adjustments while LED readouts
give instant visual notice of overload and operating
status.
The Model 3200 two-way, time-corrected loudspeaker
is a high-power unit designed to be compatible with
the Model 1200 Powermixer. A wide-range frequency
response and excellent sound quality suit it for a
great variety of performance and public-address
situations.
AUDIOMASTER System gives you outstanding
The
sound capability; it's maximally versatile and portable, and it's backed by Shure's traditional quality
and reliability.
low-
Outstanding features of AUDIOMASTER:
1200
POWERMIXER
H
Works equally well for sound reinforcement or
recording of speech, vocals, and music
Designed for churches, schools, clubs, civic and
business organizations, and small performing
H
Operates as a mixer-amplifier for a wide variety of
input sources
Supplied with six input channels (A1 200MX Expansion Modules are available for increase to a total of
eight or ten inputs)
H
HI and LO Z inputs may be used simultaneously
Switchable input attenuators on channels 1 and 2
accommodate high-input-level sources
Phantom power for condenser microphones is avail-
able at any low-impedance input
Built-in spring-type reverb, with independent level
controls for each input
H
Provides external device loop for effects device or
equalizer between PROGRAM MIX OUTPUT and
POWER AMPLIFIER INPUT
H
Pre-Volume MONITOR mix and pre-Master Vol-
ume TAPE Outputs
H
Integral switchable power amplifier Limiter pre-
vents overload distortion
H
High speaker-power output-200 watts into a4-ohm
load
H
An accessory speaker cable (A50SC) is available:
15 m (50 ft) with standard phone plugs, for quick
speaker hookup
Rack mountable or portable with accessoryAl200C
Carrying Case
H
Compact and lightweight: only 178 mm (7 in.) high,
weighs only 12.3 kg (27
Ib)
Listed by Underwriters Laboratories and by Cana-
dian Standards Association as certified
3200
LOUDSPEAKER
Big-system sound quality in a compact enclosure
H
12-inch high-temperature woofer critically tuned
to a sturdy, vented enclosure
H
Constant-directivity type high-frequency horn with
high-frequency compression driver (tweeter)
H
Special TIME SYNCTM time-corrected crossover
network with tweeter protection circuit
H
Metal grille and resilient corner protectors for maximum durability
goups
3
FRONT PANEL CONTROLS, INDICATORS..
INDIVIDUAL INPUT CHANNEL CONTROLS
MONITOR
Controls channel monitor send
independently of channel volume
control. Adjust for desired level
when using a monitor system, or
for
auxiliaryortape recording mix.
REVERB
Controls amount of reverberation
on channel (use low settings for
vocals, high settings for instruments.)
EQUALIZATION
TREBLE
Inner concentric control sets
channel treble boost or cut for
desired tone shaping.
.
Additional information
MONITOR
Control precedes VOLUME ("prefader") and other channel controls
allowing independent monitor mix
affected only by INPUT ATTENUATION.
REVERB
Control follows INPUT ATTENUATION, EQ and VOLUME controls.
TREBLE
Adjusts channel k1O dB at
does not affect MONITOR output.
10
kHz;
BASS
Outer concentric control sets
channel bass boost or cut for
desired tone shaping.
INPUT OVERLOAD INDICATOR
Lights when the input signal is
too high. Adjust
ATlON control until only
flashes are noted on signal
sional
peaks.
INPUT ATTENUATION
Adjusts input attenuation for each
channel. Suggested initial settings: condenser microphones or
amplified instruments -1
normal vocals or speech
loud vocals
ing
0.
VOLUME
Allows individual setting of channel input for desired signal mix. If
setting is consistently low (1 or 2)
or high
ATTENUATION adjustment.
IMPORTANT: Set this Control
fully counterclockwise (off) when
channel is unused.
(8
INPUTATTENU-
-1
2 to
-24;
distant mik-
to
lo),
check INPUT
occa-
2
to -30;
-6
to
-1
2;
BASS
Adjusts channel -+I0 dB at 100
Hz;
does not affect MONITOR
output.
INPUT OVERLOAD INDICATOR
Lights approximately 3 dB prior
to clipping of preamp or input
channel equalizer.
signal-to-noise ratio, adjust INPUT
ATTENUATION for occasional
flashes
operation; constant light means
distortion.)
INPUT ATTENUATION
Attenuates input preamplifier gain
up to 30 dB to permit channel to
accept any signal level from microphones to direct instrument
pickups, or high level (aux) signals from amplified instruments
or tape recorders; almost any input
device can be accommodated.
(See rear panel Channel
AUX/MIC switches.)
VOLUME
Follows INPUT ATTENUATION
and EQUALIZATION controls;
does not affect channel MONITOR level.
(no light may mean noisy
For optimum
1
&
2
MASTER CONTROLS
Additional information
MONITOR MASTER
Controls overall monitor mix level
to MONITOR OUTPUT jack.
REVERB RETURN
Controls reverb mix level to program mix.
MONITOR EQ
TREBLE
Inner concentric control sets MONITOR mix signal treble boost or cut
for desired tone shaping.
BASS
Outer concentric control sets
MONITOR mix signal bass boost
or cut for desired tone shaping.
POWER AMPLIFIER LIMITER
With switch "IN", prevents overload
distortion at speaker and headphone outputs by not allowing the
power amplifier to be overdriven
(with switch "OUT", Limiter is disabled.)
MASTER VOLUME
Adjusts overall level of mixed signals at Program Mix Output, Speaker Output, and Headphones Out-
put.
MONITOR MASTER
Independent of other master con-
trols except for MONITOR
EQ.
REVERB RETURN
Not affected by MONITOR controls. (To defeat REVERB, see rear
panel REVERB DEFEAT SWITCH.)
TREBLE
Adjusts mixed MONITOR signal
*I0 dB at 10 kHz.
BASS
Adjusts mixed MONITOR signal
210 dB at 100 Hz.
POWER AMPLIFIER LIMITER
Threshold: 1.5 dB below the onset
of clipping at speaker output. Prevents overload distortion up to 15
dB beyond onset of Limiter action.
MASTER VOLUME
Control does not affect level at Tape
Output or Monitor Output.
HEADPHONES CONTROL
Adjusts level of mixed signal at
Headphones Output.
HEADPHONES JACK
Standard quarter-inch stereo
phone jack accepts
mono or stereo headphones.
4-
to 4000-ohm
HEADPHONES CONTROL
Follows MASTER VOLUME and
LIMITER.
HEADPHONES JACK
Output is mono only; two pairs of
mono headphones can be wired to
this jack. (Connect the conductor
of one set of headphones to the tip
of a stereo phone plug; connect
the conductor of the second set to
the ring of the plug; connect both
shields to the sleeve.) Stereo
phones will also function in mono
when plugged into this jack.
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