JBL
Model
5306
Mixer/Preamplifier
The JBL
5306
is
a solid-state mixer/preamplifier
capable
of
integrating
two
program channels and
six microphone inputs.
It features
operator-oriented controls,
exceptionally wide
dynamic
range,
extended frequency
response, low noise, and
minimal
intermodulation
distortion.
Each
of
the
six
microphone channels
is equipped
with
an
overdrive
indicator
that
flashes when its preamplifier circuit
begins
to
overload.
In
use, the indicator becomes operative
before
distortion
reaches
audible
levels, providing
ample
warning
to
make
the proper
gain adjustment. The unusual
dynamic
range
of
the
5306 results
from
a
preamplifier
circuit
whose
operational
characteristics are changed
as
the gain
control
is
adjusted.
Reducing the voltage
gain
of the circuit
permits
greater
input
without clipping the output
signal.
Since
the
Master
Gain controls
the
mixing circuit in
a similar
manner,
the
5306
is
particularly
well-equipped to handle
extreme
loudness
variations.
Installation
Mounting
The 5306 can
be
rack-mounted
in three
El
A standard spaces
without
additional
bracing or
ventilation.
All external con-
nections
are made
on
the rear panel
where connectors
are
organized
and labeled
by function.
The
unit is ready to use
as
shipped; however,
various
modifications
or additions, des-
cribed
elsewhere
in
this manual,
may
be desirable for specific
applications.
Note; All
low-level
amplification
circuitry
can be adversely
affected
by strong
magnetic fields.
For this
reason,
it is
recommended
that
the 5306
be located
at
least
seven inches
from
any power
amplifier or
similar
source of
electro-
magnetic
radiation.
3
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