Compact Modular Sound Reinforcement System
CONTENTS GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CONTROLS. INDICATORS Input Channel Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . Master Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Headphones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THE SHURE AUDIOMASTERB SYSTEM: Model 1200 Powermixer Model 3200 Loudspeaker Outstanding features of AUDIOMASTER: 1200 POWERMIXER H Designed for churches, schools, clubs, civic and business organizations, and small performing goups Model A1 200MX Expansion Module H Model A1 200C Portable Case CONGRATULATIONS! You have purchased the Shure Model 1200 Powermixer, the finest compact mixer-amplifier available today.
FRONT PANEL CONTROLS, INDICATORS.. . INDIVIDUAL INPUT CHANNEL CONTROLS Additional information MONITOR Controls channel monitor send independently of channel volume control. Adjust for desired level when using a monitor system, or for auxiliaryortape recording mix. MONITOR Control precedes VOLUME ("prefader") and other channel controls allowing independent monitor mix affected only by INPUT ATTENUATION.
MASTER CONTROLS Additional information MONITOR MASTER Controls overall monitor mix level to MONITOR OUTPUT jack. MONITOR MASTER Independent of other master controls except for MONITOR EQ. REVERB RETURN Controls reverb mix level to program mix. REVERB RETURN Not affected by MONITOR controls. (To defeat REVERB, see rear panel REVERB DEFEAT SWITCH.) MONITOR EQ TREBLE Inner concentric control sets MONITOR mix signal treble boost or cut for desired tone shaping.
INDICATORS Additional information OVERLOAD Red LED flashes to warn of unsafe operating conditions; lights continuously if power amp shuts down because of overheating or because of an abnormal speaker load (i.e., a short circuit). OVERLOAD If OVERLOAD LED continually flashes or stays on, disconnect or correct any abnormal load or obstructed airflow. All low level circuitry remains operative (e.g., TAPE output will not be affected during power amp shutdown.
REAR PANEL INPUTS, OUTPUTS, SWITCHES.. . AUDIO INPUTS Additional information CHANNEL 1 & 2 AUXIMIC switch in AUX position allows hiah level aux source (tape recorder,f~ tun1er, CD player, etc.) to be connected to HI Z input. Use MIC position for high-impedance microphones or other low-level high-impedance sources. CHANNEL 1 & 2 Switch in AUX position provides fixed 22 dB added attenuation allowing virtually any high level source to be connected to HI Z MIC inputs on these 2 channels.
OUTPUTS AND INPUTS (quarter-inch phone jacks) Additional information MONITOR OUTPUT Unbalanced high-level output unaffected by Input Channel controls except INPUT ATTENUATION and individual MONITOR. For separate monitor amplifier system, or remote amplifierlspeaker. MONITOR OUTPUT HI Z, unbalanced, aux level, prefader output, affected by MONITOR EQ and MONITOR MASTER controls. TAPE OUTPUT Designed for connection to "TAPE IN" on tape recorder or to aux input of similar device.
Additional information SPEAKER OUTPUTS Two parallel-wired jacks for minimum 4-ohm load, maximum 200watt output. Suggested speaker load: two Model 3200 Loudspeakers (8 ohms each, two in parallel equal 4 ohms), or one or two other high-power &ohm speakers, or one 4-ohm speaker. Use A50SC Accessory Speaker Cable* to connect speakers. If only one 3200 soeaker (or any other 8-ohm speaker) is used, maximum power output will be 120'watts. * I 5 m (50 ft) with standard X in. phone plug at each end.
SETUPS The AUDIOMASTER system is extremely versatile; consequently it can be used in a wide variety of applications. The setups shown in this section briefly illustrate the different combinations that are possible. SOUND REINFORCEMENT WlTH A GRAPHIC EQUALIZER [OR EFFECTS DEVICE) connect a graphic equalizer or effects device to the EXTERNAL DEVICE LOOP: PROGRAM MIX OUTPUT to graphic equalizer input, graphic equalizer output to POWER AMPLIFIER INPUT. Connect the speakers as for Basic Sound Reinforcement.
SOUND REINFORCEMENT WITH A SEPARATE MONITOR AMP AND SPEAKERS Connect two speakers to the two Powermixer SPEAKER OUTPUTS.Connect the MONITOR OUTPUT to the monitor amplifier aux input; connect the monitor speakers to the monitor amp. (Only INPUT ATTENUATION, channel MONITOR, MONITOR EQ and MONITOR MASTER controls affect the MONITOR OUTPUT signal.
OPERATION 1. Position the microphones and connect them to the AUDIOMASTER Powermixer 1200. If more than six microphones are required, add up to two A1 200MX Expansion Modules. Each Module adds two lowimpedance and two high-impedance microphone inputs. (Modules are for installation by qualified service personnel only.) If necessary, it is possible to use both inputs on each channel. (See Audio Inputs, page 7.) If long microphone cable runs (more than 6.1 m [20 ft.
TROUBLESHOOTING Should any difficulty be encountered in operation of your AUDIOMASTER System, the trouble can often be traced to some simple source. The following is offered as a basic guide to solving this kind of problem. SYMPTOM PROBABLE CAUSE AND CORRECTION Powermixer is "dead" (no output, POWER LED off) 1. Check that ac power source is "live" and Model 1200 is plugged in. 2. Check that POWER switch is on. 3. Check that rear panel fuse (5 A, 250V) is good. 4.
SPECIFICATIONS TYpe Mono Powermixer Frequency Response Flat 1, -3 dB, 40 Hz to 20 kHz (any input to any output) Inputs Six input channels: six unbalanced high- and/or balanced low-impedance inputs; channels l and 2 highimpedance inputs switchable to Aux level; available expansion modules* each contain 2 high- and 2 lowimpedance microphone inputs; two modules (4 channels) can be added to each 1200 Power Output (1 kHz, 120 Vac, 1% THD) 200 watts minimum with 4 ohm speaker 120 watts minimum with 8 ohm speaker
Copyr~ght1987.
