manuals.online logo
Brands
  1. Home
  2. •
  3. Brands
  4. •
  5. Universal Audio
  6. •
  7. Stereo Equalizer
  8. •
  9. Universal Audio 535 User manual

Universal Audio 535 User manual

Other manuals for 535

1

Other Universal Audio Stereo Equalizer manuals

Universal Audio 537 User manual

Universal Audio

Universal Audio 537 User manual

Universal Audio 533 User manual

Universal Audio

Universal Audio 533 User manual

Universal Audio 529 User manual

Universal Audio

Universal Audio 529 User manual

Popular Stereo Equalizer manuals by other brands

Pyramid PM8600 owner's manual

Pyramid

Pyramid PM8600 owner's manual

Pioneer DEQ-P90 owner's manual

Pioneer

Pioneer DEQ-P90 owner's manual

Roland E-660 owner's manual

Roland

Roland E-660 owner's manual

elysia mpressor manual

elysia

elysia mpressor manual

Free The Tone PA-1QG quick start guide

Free The Tone

Free The Tone PA-1QG quick start guide

Kenwood KRC-999II instruction manual

Kenwood

Kenwood KRC-999II instruction manual

AudioBahn AEX250X operating instructions

AudioBahn

AudioBahn AEX250X operating instructions

Onkyo EQ-08 Service manual

Onkyo

Onkyo EQ-08 Service manual

Samson D3500 owner's manual

Samson

Samson D3500 owner's manual

Me WM8 installation instructions

Me

Me WM8 installation instructions

Rob Papen RP-EQ user guide

Rob Papen

Rob Papen RP-EQ user guide

Kenwood GE-4030 instruction manual

Kenwood

Kenwood GE-4030 instruction manual

Rane RE 27 Operating and service manual

Rane

Rane RE 27 Operating and service manual

SPL SX2 owner's manual

SPL

SPL SX2 owner's manual

Rane MQ 302S Operator's manual

Rane

Rane MQ 302S Operator's manual

Aphex 9901 operating guide

Aphex

Aphex 9901 operating guide

Behringer Ultragraph Pro FBQ6200 Technical specifications

Behringer

Behringer Ultragraph Pro FBQ6200 Technical specifications

Black Rooster Audio VEQ-5 OVERVIEW & INSTRUCTIONS

Black Rooster Audio

Black Rooster Audio VEQ-5 OVERVIEW & INSTRUCTIONS

manuals.online logo
manuals.online logoBrands
  • About & Mission
  • Contact us
  • Privacy Policy
  • Terms and Conditions

Copyright 2025 Manuals.Online. All Rights Reserved.

www.SteamPoweredRadio.Com
I
I
I
I
I
I
I
I
I
Murn
□
model
535
DUAL GRAPHIC EQUALIZER
model
533
GRAPHIC EQUALIZER
UNITED
RECORDING
ELECTRONICS
INDUSTRIES
8460
SAN
FERNANDO
RD
..
SUN
VALLEY
.
CALIFORNIA
91352
(818)
767
-
1000
.
M[re
~
www.SteamPoweredRadio.Com
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
BEFORE
PROCEEDING
WITH
COMPLETE UNPACKING AND
SETUP,
CONSULT UNPACKING AND INSPECTION INSTRUCTIONS
ON
PAGE
4
model
535
DUAL GRAPHIC EQUALIZER
model
533
GRAPHIC EQUALIZER
United
Recording
Electronics
Industries
8460
SAN
FERNANDO
ROAD,
SUN
VALLEY,
CALIFORNIA
91352
(818)
787-
.
1000
Printed
in U.S.A.
©
Copyright
1979,
UREI
www.SteamPoweredRadio.Com
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
TABLE
OF
CONTENTS
SECTION
I.
INTRODUCTION
1.1
.
DESCRIPTION
1.2
SPECIFICA~IONS
1.3
CONTROLS
SECTION
II.
INSPECTION
AND
INSTALLATION
2.1
UNPACKING
AND
INSPECTION
2.2
ENVIRONMENTAL CONSIDERATIONS
2.3
POWERING
2.4
LINE
VOLTAGE
SWITCH
2.5
EXTERNAL CONNECTIONS
2.5.1
MODEL
301
XLR/QG ADAPTER
2.6
IMPEDANCE
AND
TERMINATION
2.7
SIGNAL LEVEL
AND
OVERLOAD
DETECTOR
2.8
ACCESSORIES
2.9
RACK
MOUNTING
A
MODEL
533
2.10
RACK
MOUNTING
TWO
UNITS
(MODEL
533)
SECTION
Ill.
OPERATING INSTRUCTIONS
3.1
GENERAL
3.2
SYSTEM
CHECK
3.3
EXPERIMENTATIO~
3.4
DOCUMENTATION
3.5
APPLICATION
3.5.1
OBJECTIVE
MEASUREMENTS
VS
SUBJECTIVE
HEARING
3.5.2
ADDITIONAL
HINTS
3.5.3
SPECTRAL
DISTRIBUTION
IN
THE
AUDIO SIGNAL
3.5.4
EQ
SYSTEMS
AND
LIMITERS
3.6
DISCUSSION
OF
EQUALIZATION
3.6.1
BEFORE EQUALIZATION
3.6.2
MEASUREMENT
TECHNIQUES
3.6.3
ADJUSTMENT
OF
EQUALIZERS
3.6.4
SOME
PROBLEMS
WITH
CORRECTIVE
ROOM
EQ
3.6.5
FEEDBACK
~UPPRESSION
3.7
GAIN STRUCTURE
AHD
SIGNAL-TO-NOISE
3.8
INPUT LEVEL
3.9
OVERLOAD
INDICATOR
SECTION
IV.
THEORY
OF
OPERATION
4.1
GENERAL
4.2
INPUT
AMPLIFIER
4.3
GAIN
AMPLIFIER
4.4
GRAPHIC EQUALIZER
4.4.1
GENERAL
4.4.2
FILTERS
PAGE
1
2
3
4
4
4
5
5
6A
7
8
8
8
9
11
11
11
-
11
11
13
13
14
14
15
17
18
19
19
20
21
22
22
23
23
23
23
23
23
www.SteamPoweredRadio.Com
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
TABLE
OF
CONTENTS
4.4.3
THE
ACTIVE INDUCTOR
4.5
OUTPUT
AMPLIFIER
4.6
OVERLOAD
INDICATOH
4.7
POWER
SUPPLY
SECTION V.
MAINTENANCE
5.1
GENERAL
5.2
REPAIRS
AND
WARRANTY
5.3
SERVICE ADJUSTMENTS
5.3.1
COMMON
MODE
BALANCE
5.3.2
OFFSET ADJUSTMENT
5.4
CLEANING
5.5
ON
OP
AMPS
SECTION
VI.
ILLUSTRATION
SCHEMATIC
DIAGRAM
OF
UREI
MODEL
SCHEMATIC
DIAGRAM
OF
UREI
MODEL
(Continued)
PAGE
25
26
26
26
27
27
27
27
28
28
29
533
535
www.SteamPoweredRadio.Com
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
; .
SECTION I
INTRODUCTION
Bffll
FIGURE
1.
MODEL
535
FRONT
PANEL.
NOTE:
This
manual
contains
complete
instructions
for
the
operation
of
the
two-channel
"Dual
Graphic
Equalizer"
Model
535.
However,
this
manual
is
also
intended
for
the
single
channel
"Graphic
Equalizer"
Model
533.
If
used
with
a
Model
533,
all
references
to
the
two-channel
unit
should
be
disregarded.
1.1
DESCRIPTION
The
Model
535
Dual
Graphic
Equalizer
is
a
studio
quality
product
which
has
wide
application
in
recording,
sound
reinforcement,
radio
and
TV
production,
and
high
fidelity
music
systems.
The
system
is
designed
to
operate
at
any
nominal
level
from
as
low
as
-20
dB
(Ref.
0.775
V)
allowing
its
use
with
low
level
mixers,
high
or
low
impedances,
and
balanced
or
single-ended
circuits.
The
Model
535
provides
12
dB
of
boost
or
cut
at
each
of
its
10
frequencies
which
are
centered
at
ISO
!-octave
increments
from
31.5
Hz
to
16
kHz.
The
positions
of
the
control
arms
of
the
vertical,
stepless
controls
provide
a
graphic
representation
of
the
response
curve
selected.
The
filters
are
active,
minimum
phase,
2-pole
synthesized
LC
networks,
whose
skirts
properly
combine
for
minimum
ripple
and
phase
shift
when
used
in
combination.
A
front
panel
control
adjusts
the
gain
from
-10
dB
to
+20
dB.
Bypass
switches
permit
switching
the
equalization
out
for
A-B
tests.
An
optional
(SC-1)
security
cover
may
be
installed
to
protect
all
operating
controls
against
inadvertent
disturbance
or
tampering
in
fixed
installations.
-1-
www.SteamPoweredRadio.Com
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
l.
✓•
SPECIFICATIONS
ELECTRICAL
(EACH
CHANNEL):
INPUT:
Balanced
bridging,
differential
amplifier.
INPUT IMPEDANCE: 40
kohms,
used
as
balanced
input.
20
kohms,
used
as
unbalanced
(single-ended)
input.
MAXIMUM
INPUT LEVEL:
+20
dB
(7.75
volts).
EQUIVALENT
INPUT NOISE:
Less
than
-90
dBm.
15.7
kHz
noise
bandwidth
with
all
controls
set
flat,
output
termina-
ted
with
600
ohm
load
(Model
535,
-88
dBm).
GAIN:
Variable,
-10
dB
to
+20
dB,
with
front
panel
control.
FREQUENCY
RESPONSE:
±1
dB,
20-20,000
Hz
(with
no
EQ).
OUTPUT:
Floating,
transformer
isolated.
OUTPUT
LOAD:
150
ohms
or
greater.
POWER
OUTPUT:
+24
dBm
into
600
ohm
load
(12.28
volts),
+20
dB
into
150
ohm
load
(7.75
volts).
DISTORTION:
Less
than
0.25%
THD, 30
Hz
to
15
kHz
at
maximum
rated
output.
FILTER TYPE:
2-pole
synthesized
L-C.
FILTER
BANDWIDTH:
1-octave
at
-3
dB
points
with
8 dB
boost
or
cut.
CENTER
FREQUENCIES:
Standard
ISO
(Hz)
31.5
63
125
250
500
lk
2k
4k
Bk
16k.
FREQUENCY
ACCURACY:
RANGE
OF
BOOST
AND
CUT:
CALIBRATION
OF
BOOST
AND
CUT:
CHANNEL
SEPARATION:
MISCELLANEOUS:
POWER
REQUIREMENTS:
±3%
of
center
frequency.
12
dB,
single
filter
section.
Within
1 dB
of
indicated
setting,
Oto
±6
dB,
within
1.5
dB
of
indicated
setting,
±6
to
±12
dB,
(single
filter
section).
60 dB
worst
case
at
high
frequencies,
typically
better
than
80
dB.
100-125
VAC
or
200-250
VAC,
50/60
Hz,
switch
selectable,
less
than
10
w.
-2-
www.SteamPoweredRadio.Com
I
I
I
I
·1
I
I
I
I
I
I
I
I
I
I
I
I
I
I
ENVIRONMENT:
Operating
0°C
to
+50°C
(+32°F
to
+122°F);
storage
-20°C
to
+60°C
(-4°F
to
+140°F).
CONNECTIONS:
Input
and
output,
through
rear
chassis
barrier
strip,
or
XLR/QG
connectors
through
Model
301
accessory
adapter;
Power
through
3-wire
power
cable;
Model
533
utilizes
IEC
style
connector
and
power
cord.
(See
Installation
Instructions,
Section
2.5.)
PHYSICAL CHARACTERISTICS:
DIMENSIONS:
Model
535,
483
x
89
mm
rack
panel;
depth
behind
panel
203
mm.
(19"
x
3-1/2"
x
8");
Model
533,
216
x
89
mm
rack
panel;
depth
behind
panel
190
mm
(8-1/2"
x
3-1/2"
x
7-1/2").
FINISH:
Panel
is
3.18
mm
(1/8")
brushed
clear
anodized
aluminum,
in
two
shades.
Chassis
is
cadmium
plated
steel.
WEIGHT:
Model
535,
4.31
kg
(9.5
pounds);
Model
533,
2.95
kg
(6.5
pounds).
SHIPPING
WEIGHT:
Model
535,
6.35
kg
(14
pounds);
Model
533,
4.08
kg
(9
pounds).
ACCESSORIES:
Model
SC-1
Security
Cover,
smoke
gray
transparent
plastic;
covers
all
operating
controls
(Model
535
only).
1.3
CONTROLS:
Model
301
XLR/QG
adapter;
two
needed
for
Model
535.
One
adapter
provides
connec-
tions
for
signal
input
and
output.
EQUALIZATION:
Vertical
slide
controls,
continuously
variable
Oto
±12
dB.
GAIN:
Screwdriver
adjustable
from
-10
dB
to
+20
dB.
EQ
IN/OUT:
Front
panel
toggle
switch.
POWER:
Front
panel
toggle
switch.
INDICATORS: LED,
Power
ON;
LED,
Overload
Condition,
levels
monitored
at
3
circuit
points;
MAINS
VOLTAGE:
Rear
panel
slide
switch,
115/230
volts.
-3-
www.SteamPoweredRadio.Com
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
SECTION
II
INSPECTION
AND
INSTALLATION
2.1
UNPACKING
AND
INSPECTION
Your
Model
535
was
carefully
packed
at
the
factory,
and
the
container
was
designed
to
protect
the
unit
from
rough
handling.
Nevertheless,
we
recommend
careful
examination
of
the
shipping
carton
and
its
contents
for
any
sign
of
physical
damage
which
could
have
occurred
in
transit.
If
damage
is
evident,
do
not
destroy
any
of
the
packing
mater-
ial
or
the
carton,
and
immediately
notify
the
carrier
of
a
possible
claim
for
damage.
Shipping
claims
must
be
made
by
the
consignee.
'
The
shipment
should
include:
Model
535
Dual
Graphic
Equalizer
UREI
Instruction
Manual
(this
book)
Two-part
Warranty
Card
bearing
the
same
serial
number
as
the
Model
535.
Mounting
screws
and
finish
washers
(for
rack
mounting
of
535
only).
2.2
ENVIRONMENTAL
CONSIDERATIONS
The
system
will
operate
satisfactorily
over
a
range
of
ambient
temperatures
from
0°C
to
+50°C
(+32°F
to
122°F),
and
up
to
80
%
relative
humidity.
If
the
system
is
installed
in
an
equipment
rack
together
with
high
heat
producing
equipment
(such
as
power
amplifiers),
adequate
ventilation
should
be
provided
to
prolong
the
life
of
components.
Also,
while
circuitry
susceptible
to
hum
pick-up
is
sufficiently
shielded
from
moderate
electromagnetic
fields,
installation
should
be
planned
to
avoid
mounting
the
system
immediately
adjacent
to
large
power
transformers,
motors,
etc.
2.3
POWERING
The
535
may
be
operated
from
either
100-125
VAC
or
200-250
VAC
mains
(50
or
60
Hz,
single
phase.)
As
indicated
in
Section
2.4,
the
nominal
line
voltage
may
be
selected
with
a
rear
panel
switch.
BE
SURE
TO
VERIFY
BOTH
THE
ACTUAL
LINE VOLTAGE,
AND
THE
SETTING
OF
THE
VOLTAGE
SELECTOR
SWITCH
BEFORE
CONNECTING
THE
535
TO
THE
MAINS.
-4-
www.SteamPoweredRadio.Com
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
To
comply
with
most
Electrical
Codes,
the
535
is
supplied
with
a
three-wire
AC
cord,
the
grounding
pin
of
which
is
connected
to
the
chassis.
In
some
installations
this
may
create
ground-loop
problems.
Ground
loops
can
become
very
evident
(as
hum
and
buzz)
if
a
significant
potential
difference
exists
between
the
AC
conduit
ground
and
the
~rounded
metal
enclosure
in
which
the
chassis
is
installed.
If
hum
is
experienced,
check
for
the
possibility
of
ground
loops
by
using
a
3-prong
to
2-prong
AC
adapter,
ungrounding
the
AC
plug
temporarily.
This
ungrounds
the
Model
535,
and
will
probably
cure
the
hum
or
buzz,
but
is
not
a
substitute
for
proper
system
grounding.
Be
aware
that
unless
the
Model
535
Dual
Graphic
Equalizer
is
AC
grounded,
a
safety
hazard
can
exist.
UREI
accepts
no
responsibility
for
legal
actions
or
for
direct,
incidental
or
consequential
damages
that
may
result
from
violation
of
any
electrical
codes.
2.4
LINE
VOLTAGE
SWITCH
Unless
a
tag
on
the
line
cord
specifies
otherwise,
the
Model
535
was
shipped
ready
for
operation
with
nominal
115
VAC
power
mains.
In
order
to
change
this
for
nominal
230
V
(50
or
60
Hz),
slide
the
VOLTAGE
SELECTOR
switch
on
the
rear
panel
to
the
230
position.
The
voltage
is
visible
in
a
window
next
to
the
switch
slot.
Be
sure
to
change
the
fuse
to
the
correct
value:
1/8-amp
slo-blo
when
changing
to
230
V
operation
or
1/4-amp
slo-blo
for
115
V
operation.
A
small
screwdriver
should
be
used
to
move
the
recessed
switch.
2.5
EXTERNAL
CONNECTIONS
Permanent
input
and
output
signal
wires
should
be
shielded
cable,
and
connected
in
accordance
with
standard
wiring
practice,
as
indicated
on
the
rear
panel
barrier
strip.
If
the
XLR/QG
connectors
are
to
be
used,
install
the
accessory
Model
301
according
to
the
instructions
suppplied
with
the
adapter.
(See
also
"Mounting
Instructions,"
page
6A.)
If
the
Model
535
output
is
connected
to
a
high
impedance
circuit,
we
recommend
shunting
the"±"
and
"COM"
output
terminals
with
a
620
ohm,
1/2
watt
resistor.
This
assures
optimum
loading
for
the
535.
(See
section
2.6
regarding
input
termination).
(See
Figures
2
and
3
on
the
following
page)
-5-
www.SteamPoweredRadio.Com
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
OUTPUT
GRD
INPUT
±
COM
COM
±
FIGURE
2.
CONNECTING
THE
MODEL
535
WITH
BALANCED
INPUT
AND
BALANCED
OUTPUT
CIRCUITS.*
OUTPUT
GRD
INPUT
±
COM
COM
±
FIGURE
3.
CONNECTING
THE
MODEL
535
WITH
UNBALANCED
INPUT
AND
UNBALANCED
OUTPUT
CIRCUITS.*
*With
a
balanced
input
and
unbalanced
output,
or
vice-versa,
use
the
appropriate
connections
suggested
by
each
of
the
above
diagrams.
No
special
switching
or
transformers
are
needed.
-6-