Studio Technologies 80 M80-00273, User Manual

Page: 4 / 17

Model 80 User Guide Issue 4, March 1997
Studio Technologies, Inc. Page 7
Introduction
The Model 80 Stereo Analog Audio
Distribution Amplifier was developed by
Studio Technologies as part of its Studio
Tools group of audio support products.
The Model 80 is designed to work in a
large variety of applications. Specific
applications include audio production,
duplication, broadcast, and sound rein-
forcement. All Model 80 functions meet or
exceed the performance of the most
expensive “high end” audio equipment.
What This User Guide Covers
This User Guide is designed to assist you
when installing, configuring, and using the
Model 80 Stereo Analog Audio Distribution
Amplifier. It also contains detailed service
information, including block and sche-
matic diagrams.
System Overview
The Model 80 from Studio Technologies,
Inc. is the first distribution amplifier that
meets the needs of the real world. The
stereo input is intended to connect to
virtually any line-level audio source. The
ExactCal input calibration section allows
for optimal audio performance over a –10
to +10dBu input level range. The eight
stereo outputs meet exacting professional
standards. Capable of driving balanced or
unbalanced loads, each output can drive
+26dBu into 600 ohms. Using front panel
switches, each output can be individually
configured for a nominal output level of
–10 or +4dBu.
The front panel controls and LEDs make
installation and setup a simple job. The
AC mains input power is factory config-
ured for 100, 120 or 220/240V, 50/60Hz
operation. Components and construction
standards make the Model 80 suitable
for continuous operation, even for on-air
broadcast applications.
System Features
One Stereo Input
The differential input circuitry is compat-
ible with balanced or unbalanced signals
having a nominal level range of –10 to
+10dBu. Using laser trimmed compo-
nents, the input offers superior common-
mode signal rejection. To achieve optimal
audio performance the ExactCal calibra-
tion section matches the specific input
level with the Model 80’s internal gain
structure. Two controls and four LEDs
allow fast, precise calibration. Unlike other
distribution amplifiers, the Model 80
ensures that excellent audio performance
can be achieved with little or no hassle.
In addition to separate left and right input
connectors, two input loop-through con-
nectors are also provided. This simple
feature can make installation with related
equipment much easier. The loop-through
connectors allow the Model 80’s input
source to be connected to another Model
80 or to yet another device.
Eight Stereo Outputs
The Model 80 contains eight independent
stereo output sections. For compatibility
with a range of facilities, each output
section can be separately configured for
–10 or +4dBu nominal output level. Each
output features an electronically balanced
circuit capable of driving balanced or
unbalanced loads. Operating an output
in an unbalanced configuration does not
cause its nominal output level to change.