Specifications

1. Position the microphones and connect them to the
PRO MASTER'". Use both inputs on each channel
if
more than six microphones are to be connected.
Use low-impedance microphones and cables to
minimize loss and interference
if long microphone
cable lengths are needed.
2. Position the speakers and connect them to the
PRO MASTER. Make sure the combined speaker
load is not less than
4 ohms on each channel. Use
minimum cable lengths to maximize output power.
Use the proper cable size for the required length.
3. Make any rear-panel patching connections
required (refer to
SETUPS section). All patching
connections except the A+ B MIC OUTPUT are
standard two-conductor,
'/'-inch phone jacks.
4. Connect any external effects device to the PRO
MASTER EFFECTS OUTPUT and AUX INPUT
jacks. Power for the external effects device can be
obtained from the PRO MASTER rear-panel
UNSWITCHED AC receptacle (100 watts
maximum).
5. Connect the PRO MASTER line cord to an ac
source capable of supplying
1100 watts. If
extension cords are required, make sure they are
16 AWG or larger.
6. Make sure the PRO MASTER air louvers are not
blocked. Check to make sure the air filter is clean.
7. In low ambient light conditions, a high-intensity,
low-wattage lamp (not supplied) can be plugged
into the rear-panel UNSWITCHED AC receptacle
(100 watts maximum).
8. Set the front-panel controls to their initial settings
(orange marks). Set the INPUT
ATTEN controls for
the usage on each input. Turn on the rear-panel
power ON-OFF switch.
9. Adjust the A and B MASTER volume controls to the
desired level. Using program material similar to the
actual performance, adjust the PAN, MONITOR,
EFFECTSIREVERB and EQ controls as desired for
the most pleasing sound.
10. Using the FEEDBACK FINDERTM, set the equalizers
for the highest feedback-free sound level. The
equalizer controls can then be "touched up" for
most pleasing sound.
11. During operation, observe the various LED
indicators for possible setting corrections:
A. INPUT CLIP-If on constantly, use the INPUT
ATEN to reduce the input signal and eliminate
the distortion. (Set for occasional flashing.)
B. DB PEAK-Observe action to monitor output
power level and channel balance.
C. PA OVERLOAD-If on constantly, reduce
volume
and/or check speaker load.
D. TEMP WARNING-Check for air blockage,
dirty air filter, shorted speaker cable or
excessive heat near the console.
E. SHUTDOWN-Check for excessive console
heating or cooling fan failure.
Mcrintencrnce
The PRO MASTER is an exceptionally
well-designed unit. All components are of the
highest quality, operating well within their
respective ratings to assure long life. The
following list of Do's and Don'ts describes
minimal operating precautions and
maintenance to provide years of dependable
service.
DO clean the air filter every 100 hours of
operation (more frequently in dusty or dirty
areas). Stand the console on its rear
bumpers, remove the screw securing the
filter, and slide it out of its slot. Rinse the filter
in water or a mild detergent solution, allow to
dry, and replace.
DO unplug the console before cleaning. DO
clean the outer surfaces of the console with a
clean, damp cloth and mild detergent.
DON'T use strong solvents or cleaning fluids.
DO use a 16 AWG or larger heavy-duty
extension cord when additional line cord
length is needed.
DON'T operate the console with air louvers
blocked, or placed on a radiator or
heat-producing equipment. Avoid operation
in direct, hot sunlight.
DON'T replace the rear-panel fuse with a
different size or type. Use only
10A, 250V,
type 3AB or ABC.
DON'T connect the A and B speaker outputs
together (see text for monophonic setups).
DON'T risk fire or shock hazard by operating
the console in rain.
DON'T use unbalanced low-impedance
microphones with the SIMPLEX
24V switch
on; turn off the switch if not required for
powering condenser microphones. If
simplex power is in use, connect unbalanced
low-impedance microphones through a line
matching transformer (Shure
A95FP) to a HI
IMP INPUT
Troubleshooting
Should any difficulty be encountered in
console operation, the problem can often be
traced to some simple source such as an error
in interconnection. The following is offered as a
basic guide to this type of problem.