Protech Audio 862B - Manual

MODELS COVERED
INTEGRA III SYSTEM
PROTECH ®
INSTALLATION & OPERATION
MANUAL
AUDIO DISTRIBUTION AMPLIFIER CARDS
862B
863B
864B
865B
The 800 Series Audio Distribution Amplifiers are
designed for use in professional audio applications. Each
model is designed to accept an audio signal in, and send
the signal to multiple destinations.
Typical applications are public address announcements that
must be fed to different zones or power amplifiers, program
material that must be fed to different studios, headphone
listening systems where the user can select different program
sources, or audio recording systems where the program
material must be fed to the recorders at the same time it is
being fed to a public address system. The actual application
of the distribution amplifiers is found in such buildings as
airports, factories, courthouses, casinos, convention centers,
libraries, racetracks, training systems, and corporate board-
rooms, to mention a few.
The 800 Series Audio Distribution Amplifiers are
designed to incorporate a combination of features that will
allow the units to deliver maximum performance and reli-
ability. Each circuit is designed with a minimum of compo-
nents, to reduce the possibility of failure, while still maintain-
ing perfromance and feature criteria. The distribution amplifiers are available with a choice of
microphone or line level inputs, and 2 to 5 ouputs. The
microphone input units have a push-on jumper to enable
15VDC phantom power. Modules with 2 to 4 outputs are
linkable, to create larger networks. The link capability is
not available on the 5 output units.
The gain structure of the 800 ADA's allows the level of each
output to be individually adjusted. The output level may be
adjusted up, or down, with respect to the input level. If a low
input level is present, and more gain is required, the input
section has adjustable gain.
The trimpots used to adjust the input and output levels are
mounted on the accompanying backplane assembly. This fea-
ture allows the system gain settings to remain adjusted, even
when a distribution amplifier is removed from it,s slot, and a
spare unit is plugged into that slot.
Since the 800 Series ADA's are used to connect multiple pieces
of audio equipment, and there exists the potential for creating
ground loops when doing so, the input section, and each of the
outputs are individually isolated using high quality audio
transformers. This feature provides the maximum in isolation
and ground loop prevention.
866B
867B
868B
869B
Model 865B Shown
www. protechaudio .com
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Protech Audio Corporation, PO Box 597, 192 Cedar River Road, Indian Lake, New York, 12842, Voice 518-648-6410 Fax 518-648-6395