Protech Audio 808B - Manual

PROTECH
MODELS COVERED
The 800 Series Microphone Preamplifiers and Line Am-
plifiers are designed for use in professional audio
appplications. Each model has either one or two
channels, designed to operate as a discrete microphone
preamplifier or line amplifier. Dual channel cards will have
two identical channels constructed on one printed circuit
board.
Typical applications are public address systems,
broadcast studios, sales presentation rooms head-
phone listening systems, multi-room audio systems,
and recording systems. The actual application of the
amplifiers is found in buildings such as airports,
factories, courthouses, casinos, convention centers,
libraries, hotels, racetracks, training systems, corporate
boardrooms, etc...
The 800 Series Microphone Preamplifiers come in
two different models. There is a single channel, model
808B, and dual channel, model 816B. Both models
have low impedance transformer isolated inputs, and
a push-on red jumper, per channel, to enable 15 volt
phantom power. The gain of each channel is adjustable,
from 17 to 52dB.
The output section is balanced, transformer isolated. The 800 Series Line Amplifiers offer 4 different models, 2
single channel versions, and 2 dual channel versions.
The input section of the line amplifiers is available in two
different impedances. These are; bridging balanced-
transformer isolated (10K ohm input impedance), and 600
ohm balanced-transformer isolated. This allows the user
to match the line amplifiers to a variety of professional
audio equipment.
The trimpots used to adjust the gain levels of the micro-
phone preamplifiers and line amplifiers are mounted
on the accompanying backplane assembly. This feature
allows the system gain settings to remain adjusted, even
when a line amplifier is removed from it's slot, and a
spare unit is plugged into that slot.
The output section of the line amplifiers is balanced
transformer isolated. On page 3 of this manual, you
will find a table showing the model numbers, and features
of each of the microphone preamplifiers, and the line
amplifiers.
Each of these products is designed to provide the user
with high quality audio, for years of uninterrupted
service.
®
INTEGRA III SYSTEM
800 SERIES
MICROPHONE PREAMPLIFIER & LINE AMPLIFIERS
INSTALLATION & OPERATION MANUAL
806B
807B
808B*
814B
815B
816B*
*Microphone Preamplifier
Model 816B Shown
1/02
www. protechaudio .com
Protech Audio Corporation, PO Box 597, 192 Cedar River Road, Indian Lake, New York, 12842, Voice 518-648-6410 Fax 518-648-6395