Symetrix 531E, 532E User Manual

531E and 532E Graphic Equalizers

630500400315

500315 400 630

E

531

GRAPHIC
EQUALIZER

E

532

GRAPHIC
EQUALIZER

POWER

POWER

CLIP

10dB

0dB

-20dB

CH1 LEVEL

CLIP

10dB

0dB

-20dB

CH2 LEVEL

CLIP

10dB

0dB

-20dB

LEVEL

INPUT

U

- +15

∞

INPUT

U

∞

INPUT

U

∞

8

8

+15

8

+15

CUT FILTERS

HIGH CUT

LOW CUT

22

50

5K

115

3K 65K

6260

CH1 CUT FILTERS

HIGH CUT

LOW CUT

22 50

5K

115

3K 65K

6 260

CH2 CUT FILTERS

HIGH CUT

LOW CUT

22 50

5K

115

3K 65K

6 260

20

+12

+6

+6

+3

18K

MODE

0

42K

±12dB

BYPASS

±6dB

-6

-3

-12

-6

20

CH1

18K

0

MODE

42K

±12dB
BYPASS

±6dB

20

CH2

18K

0

MODE

42K

±12dB
BYPASS

±6dB

20

50

4025 31.5

50

50

4025 31.5

50

4025 31.5

50

1254025 31.5

10063 80

200160 250

125

25020016010063 80 1254025 31.520

250160 20010063 80 125

25020016010063 80 125

250

160 200

10063 80

EGARDLESS OF THE SIZE OF YOUR SOUND SYSTEM, good equalization is vital to its
performance. That is why we developed the 531E and 532E Graphic Equalizers - as high

R

quality alternatives to the mediocre “affordable” equalizers available today.

In fact, the 531E and 532E are a purist’s dream

- audiophile sound quality, an uncluttered
control surface, and rugged reliability in one
package. They offer thirty-one filter bands per
channel on ISO 1/3rd-octave centers. Through
the use of a global range switch, each band
delivers either +/- 6dB or +/- 12dB of cut or

To ensure the highest level of performance, we
build the 531E/32E to touring standards.
Double sided, glass epoxy circuit boards; metal
shaft, plastic film slide potentiometers; gold­plated XLR connectors, and a heavy duty all­steel chassis deliver rugged reliability. You

don’t have to treat these EQs with kid gloves.
boost. The grounded center detent position on
each band serves as an on/off switch that
completely removes that band from the audio
signal path. In addition, they sport 12dB per
octave High Cut and Low Cut filters. Each has
a sweepable cutoff frequency and a control
range that extends well into the sub/ultrasonic.

The details are worth noting, too. High-

contrast front panel graphics make your

control settings easy-to-read - even in a

darkened concert hall. Servo-balanced outputs

remove all DC offset voltage from the output.

This eliminates the need for DC blocking

capacitors in the signal path while improving
Of course, the features and controls are
secondary to the all-important question: How
does it sound? Our design team believes that
no one should have to settle for “good

noise, distortion, and low-frequency perfor-

mance. Of course, both units incorporate a

high current, internal power supply with an

IEC-type detachable power cord.
enough”, so they threw out all the conventional
circuit designs and started from scratch. The
result: a highly advanced filter topology that
delivers extremely low distortion and noise,
even at very high signal levels. Consider the
following facts. Our proprietary filter technol­ogy delivers an extremely low noise floor,

Whether you are a professional concert sound

engineer, system designer, or musician, contact

your nearest Symetrix dealer today. Discover

for yourself why the 531E and 532E are the

right choice for any professional sound

reinforcement application. •
ultra-accurate summing, and minimal ringing

and phase shift. The total harmonic distortion
is less than 0.002%. Translation: the 531E and
532E are clean, clear, and musical-sounding.

16K 20K10K 12.5K

16K10K 12.5K 20K

16K12.5K10K 20K

16K12.5K10K 20K

20K16K12.5K10K

+12

+6

+6

+3

0

-6

-3

-12

-6

+12

+6

0

-12

-6

+12

+6

0

-12

-6

1.25K800 1K

1.6K

1.25K800 1K

1.6K

1.6K

1.25K1K800500400315 630

1.25K1K800500400315 630

1.6K

3.15K2K 2.5K

3.15K2K 2.5K

4K 8K6.3K5K3.15K2K 2.5K

4K 8K6.3K5K3.15K2K 2.5K

8K6.3K5K4K

6.3K 8K4K 5K

8K5K4K 6.3K3.15K2K 2.5K1.25K800 1K500400315 630 1.6K

APPLICATIONS

Sound Reinforcement

Installed Sound Systems

FEATURES

Proprietary topology delivers

extremely low noise and

distortion

31 constant Q bands

High cut and low cut filters

Servo balanced output

(eliminates DC offset)

Direct coupled inputs and

outputs (superb low frequency

response)

Internal power supply with

detachable cord

Symetrix Inc. Mountlake Terrace, WA, USA Tel [phone] Fax [phone] www.symetrixaudio.com

531E/

532E

531E and 532E Graphic Equalizers

GRAPHIC
EQUALIZER

E531

MANUFACTURED IN

LYNNWOOD, WA, USA

AC INPUT
10 WATTS
MAXIMUM

FABRIQUÉ AUX E.-U. PAR SYMETRIX INC., LYNNWOOD, WASHINGTON.

RÉFÉREZ TOUTE RÉPARATION À UN TECHNICIEN QUALIFIÉ.

WARNING:

SEE OWNERS MANUAL. VOIR CAHIER D’INSTRUCTIONS.

No user serviceable parts inside. Refer servicing to qualified service personnel.

Il ne se trouve a l’interieur aucune piece pourvant entre reparée l’usager.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE
THIS EQUIPMENT TO RAIN OR MOISTURE

RISQUE DE CHOC ELECTRIQUE

AVIS:

NE PAS OUVRIR

S’adresser a un reparateur compétent.

TYPICAL BALANCED CONNECTIONS

TIP = HIGH(+) = PIN 2
RING = LOW(-) = PIN 3
SLEEVE = GND = PIN 1

SLEEVE

RING

TIP

231

21

3

INPUT BALANCED

OUTPUT

BALANCED/

UNBALANCED

OUTPUT

BALANCED/

UNBALANCED

INPUT

BALANCED

GRAPHIC
EQUALIZER

E532

MANUFACTURED IN

LYNNWOOD, WA, USA

AC INPUT
20 WATTS
MAXIMUM

FABRIQUÉ AUX E.-U. PAR SYMETRIX INC., LYNNWOOD, WASHINGTON.

RÉFÉREZ TOUTE RÉPARATION À UN TECHNICIEN QUALIFIÉ.

WARNING:

SEE OWNERS MANUAL. VOIR CAHIER D’INSTRUCTIONS.

No user serviceable parts inside. Refer servicing to qualified service personnel.

Il ne se trouve a l’interieur aucune piece pourvant entre reparée l’usager.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE
THIS EQUIPMENT TO RAIN OR MOISTURE

RISQUE DE CHOC ELECTRIQUE

AVIS:

NE PAS OUVRIR

S’adresser a un reparateur compétent.

SPECIFICATIONS

Input/Output

Number of Audio Channels 531E: One, 532E: Two
Maximum Input Level +21 dBu Balanced
Maximum Output Level +21 dBu Balanced, +17 dBu Unbalanced
Input Impedance 10k Ohms Balanced, 5k Ohms Unbalanced
Output Impedance 400 Ohms Balanced, 200 Ohms Unbalanced

Performance Data

Frequency Response 10 Hz - 38 kHz (+0 dB, -1 dB)
Dynamic Range >112 dB
Signal to Noise Ratio >94 dB (unweighted, ref to +4 dBu, eq in, all bands flat)
THD+Noise (1 kHz - +4 dBu) <0.002% (10 Hz to 30 kHz measured bw,

eq in, all bands flat)

Graphic EQ Controls

Frequency Control Range 20 Hz - 20 kHz (31 bands, ISO 1/3rd octave centers)
Cut/Boost Range ± 12 dB (Mode switch up), ± 6 dB (Mode switch down)

Cut Filters

Low Cut Filter Slope 12 dB/octave
Cutoff Frequency Range 6 Hz - 260 Hz
High Cut Filter Slope 12 dB/octave
Cutoff Frequency Range 3 kHz - 65 kHz

Physical

Size (hwd) 3.47 x 19 x 8.25 inches, 8.81 x 48.26 x 20.955 centimeters
Shipping Weight 11 lbs (5kg)

Electrical

Power requirements 117V nominal, 105 to 130V AC, 50 to 60 Hz

Power Consumption 531E: 10 watts max., 532E: 20 watts max.

531E and 532E ARCHITECTS AND ENGINEERS SPECIFICATIONS

TYPICAL BALANCED CONNECTIONS

TIP = HIGH(+) = PIN 2
RING = LOW(-) = PIN 3
SLEEVE = GND = PIN 1

SLEEVE

RING

TIP

3

OUTPUT

BALANCED/

UNBALANCED

BALANCED/

UNBALANCED

CH1 INPUT

BALANCED

CH2 INPUT

BALANCED

CH1 OUTPUT

BALANCED/

UNBALANCED

BALANCED

CH2 OUTPUT

231

BALANCED/

UNBALANCED

BALANCEDINPUT

Specifications subject to change without notice.

21

230V nominal, 207 to 253V AC, 50 Hz

531E Graphic Equalizer: The Graphic
Equalizer (EQ) shall be a single channel
unit that shall provide 31 filter bands, on
ISO 1/3rd - octave centers. The lowest
band shall be centered on 20Hz, the
highest on 20kHz. There shall be a front
panel mode switch which selects the cut/
boost range of the EQ band faders, and
acts as a bypass. The EQ band controls
shall be 60mm metal shaft faders. There
shall also be separate, sweepable­frequency high-pass and low-pass filters.
The unit shall occupy two rack spaces
(2U).

The high-pass filter shall have a 12dB/
octave slope with a user-adjustable cutoff
frequency range of 6Hz to 260 Hz. The
low-pass filter shall also have a 12dB/oct
slope with a user-adjustable cutoff
frequency range of 3kHz to 65 kHz. A front
panel input level control shall provide ­(infinity)dB to +15dB of gain adjustment.

∞

When the unit is rendered inoperative by

531E/

532E

Publication ©1997 Symetrix, Inc.

loss of power, the inputs and outputs will
be wired together by a fail-safe bypass
relay. The frequency response with all
filter bands flat, EQ in, and high-pass and
low-pass set to the outside extremes of
their ranges, shall be 10Hz to 38kHz
(+0dB, -1dB). The total harmonic
distortion plus noise shall be less than

0.002% (10Hz - 30kHz, EQ in, all bands
flat). The dynamic range shall be greater
than 112 dB. The EQ shall accept a
maximum input signal of +21 dBu and
have a maximum output level of +21 dBu.
There shall be a four-segment, LED level
meter.

The inputs shall be direct-coupled, active
balanced designs terminated with 3-pin
XLR (AES/IEC standard wiring) and ¼"
TRS. The input circuitry shall incorporate
RFI filters. There shall be a servo­balanced, direct-coupled output that shall
terminate in 3-pin XLR (AES/IEC standard
wiring) and ¼" TRS.

The EQ shall be capable of operating by
means of its built-in power supply
connected to 117V nominal AC, 105-130V,
50-60 Hz (230V nominal AC, 207-253V, 50
Hz where applicable). Power consumption
shall be 10 watts maximum. There shall be
a rear panel receptacle for an IEC-type
detachable power cord. The EQ shall be UL
and CE approved. The unit shall be a
Symetrix Incorporated model 531E
Graphic Equalizer.

532E Graphic Equalizer: The Graphic
Equalizer (EQ) shall be a dual channel unit
that provides 31 filter bands per channel,
on ISO 1/3rd octave centers. The lowest
band shall be centered on 20Hz, the
highest on 20kHz. There shall be a front
panel mode switch which selects the cut/
boost range of the eq band faders, and
acts as a bypass. The eq band controls
shall be 20mm metal shaft faders. There
shall also be separate, sweepable­frequency high-pass and low-pass filters
on each channel. The unit shall occupy
two rack spaces (2U).

The high-pass filter shall have a 12dB/
octave slope with a user-adjustable cutoff
frequency range of 6Hz to 260 Hz, The
low-pass filter shall also have a 12dB/oct
slope with a user-adjustable cutoff
frequency range from 3kHz to 65 kHz. A
front panel input level control shall provide

∞ (infinity)dB to +15dB of gain

­adjustment. When the unit is rendered
inoperative by loss of power, the inputs
and outputs will be wired together by a
fail-safe bypass relay.

The frequency response with all filter
bands flat, EQ in, high-pass and low-pass
set to the outside extremes of their ranges,
shall be 10Hz to 38kHz (+0dB, -1dB). The
total harmonic distortion plus noise shall
be less than 0.002% (10Hz - 30kHz, EQ in,
all bands flat). The dynamic range shall be
greater than 112 dB. The EQ shall accept a

maximum input signal of +21 dBu and
have a maximum output level of +21 dBu.
There shall be a four-segment LED level
meter.

The inputs shall be direct-coupled, active
balanced designs terminated with 3-pin
XLR (AES/IEC standard wiring), and ¼"
TRS. The input circuitry shall incorporate
RFI filters. There shall be a servo­balanced, direct-coupled output that shall
terminate in 3-pin XLR (AES/IEC standard
wiring) and ¼" TRS.

The EQ shall be capable of operating by
means of its built-in power supply
connected to 117V nominal AC, 105-130V,
50-60 Hz (230V nominal AC, 207-253V, 50
Hz where applicable). Power consumption
shall be 20 watts maximum. There shall be
a rear panel receptacle for an IEC-type
detachable power cord. The EQ shall be UL
and CE approved.

The unit shall be a Symetrix Incorporated
model 532E Graphic Equalizer.

Symetrix Inc. Mountlake Terrace, WA, USA Tel [phone] Fax [phone] www.symetrixaudio.com