Protech Audio 2000 - Manual

Protech Audio Corp., 192 Cedar River Road, Indian Lake New York, 12842 Voice 518-648-6410 Fax 518-648-6395
MODEL 2000
AUTOMATIC MICROPHONE MIXER
WITH MIX-MINUS OUTPUTS.
INSTALLATION & OPERATION MANUAL
The Protech Audio Model 2000 Automatic Microphone
Mixer is designed to be the best operating, most transparent
auto-mixer, for fixed installations. From the Dugan Speech
System for transparent gain-sharing, to the mix-minus
output on each input channel, to the card frame mechanical
packaging, the Model 2000 is constructed to provide the
designer and installer with every feature needed for perfect
auto-mixer installations.
Before proceeding further, please make note that the
Model 2000 is shipped from the factory with all prelimi-
nary adjustments made
. The gain on each input channel
is set to 50dB, the tone controls on each are set to flat,
and the master output level is set to unity. The unit
should be installed, turned on and listened to, before
any additional adjustments are made. In many installa-
tions, no further adjustments will be required.
The first feature to make note of is the patented Dugan
Speech System for proper gain sharing in automatic mixing
applications. This operating system, when properly imple-
mented, results in the best, most transparent automatic
mixing to be found anywhere. A short listening demonstra-
tion has impressed even the most critical audio system
designers. We at Protech Audio have worked directly with
Dan Dugan Sound Design, for almost 3 years, to achieve
the optimum implementation of his superior auto-mixing
architecture.
The second feature to be discussed is the mix-minus
output on each input channel. Other systems require any
number of additional pieces of equipment, like wiring
matrixes, to achieve mix-minus. In the Model 2000, the
mix-minus feature is inherent in the design. Up to 8 separate
mix-minus outputs are inherent in each card frame assem-
bly.
In addition to the mix-minus output, each input section
incorporates a number of features, to allow installations
to be done quickly, with a minimum of wiring and set-up
time. High-Pass filters, Bass and Treble Controls, Logic
Outputs, Phantom Power, and Mute functions are built
into each input channel.
The output card has provision for two balanced line
outputs, Auxillary Input, switch selectable Master/Slave
operation, Gain Trim, Remote Volume Control, Group
Mute, optional Automatic Level Control, and optional
Pink Noise Generator
The optional Automatic Level Control works in a very
unique manner. Instead of adjusting levels at the output
only, the ALC reaches back into each input channel and
readjusts the gain at each input. This feature allows the mix-
minus to remain properly adjusted.
The card frame assemblies are linkable, to create systems
with up to 100 microphone inputs. The linking is accom-
plished by using standard DB15 cables.
PROTECH ®
1/06
www. protechaudio .com