Universal Audio 545 Manual

PARAMETRIC
EQUALIZER
MODEL
545
The Model 545
is
a true parametric
Equalizer,
in
which
all
important
filter
parameters
are continuously
variable.
It is
an
ideal tool for creative
and
corrective equalization
in
professional
sound
recording, broadcast production,
sound
reinforcement systems, motion
picture
and
TV
recording,
and
live
performances.
There
are four
parametric
filter
sections
in
the
Model 545.
Three
filters
cover overlapping ranges from
24 Hz
to
12.5 kHz.
The
fourth
filter,
with a multiplier range
switch,
is
tunable over the
entire
audio range from 15
Hz
to
20
kHz.
The
characteristic
of
the
filters is
perfectly
reciprocal
in
boost
and
cut,
and
they are continuously
adjustable
in
boost
and
cut
between
plus
and minus
15 dB, and
in
bandwidth between
1/4 and 2
octaves.
In
addition
a
High Cut and
a
Low
Cut
filter
section
may
be
tuned
to adjust the
bandwidth
of
the
equalizer.
They
are of the Butterworth type
with
an
attenuation
of
12
dB/
octave beyond
the
—
3
dB
points.
While
all filter
sections are independently adjustable, they
combine smoothly
when
tuned
to nearly the
same
or the
same
frequency. This
is
especially useful
when
extreme
filter
characteristics
and
settings are desired.
Concentric
controls,
easy
to
read
dials
and
markings,
and
accurate
calibration aid
in
selecting
and
resetting
any
filter
combination.
Due
to
the uncluttered
and
logical
arrangement
of
the
Model 545
front panel
its
operation
is
simple.
•
Four
sections
of
Parametric
Equalization; each
con-
tinuously variable
in
Bandwidth, Frequency, and
Boost
and
Cut.
•
Two
end
cut
filters
tunable over a wide range
for
bandwidth
restriction.
•
Large, easy-to-adjust controls.
•
Multi-point overload detection
circuit.
•
Balanced
or
unbalanced
bridging
input.
•
Transformer
isolated output.
•
Self
contained
with regulated
power
supply.
•
UREI
quality, of
course.
An
overload detection
circuit
monitors the signal throughout the
unit.
If
the
signal
level in
any
part of
the
circuit
approaches
overload, a front panel
LED
flashes to
warn
the
user.
A
bypass switch permits switching the equalizer
sec-
tion out
of
the system, restoring
flat
frequency
response.
All
components
are conservatively rated
and
of high
quality.
The
built-in regulated
power supply assures dependable
operation
from
either
100
-
125
or
200
-
250
VAC,
50
or
60
Hz.
The
unit
may
be
mounted
in
a
standard
19"
rack.
UNITED
RECORDING ELECTRONICS
INDUSTRIES
8460 SAN
FERNANDO
RD.,
SUN
VALLEY,
CALIFORNIA 91352
(213)
767-1000
TELEX 65-1389
UREI
SNVY
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