Symetrix 551E User manual

Symetrix, Inc. • Lynnwood, WA USA • Tel [phone] • Fax [phone] • www.symetrixaudio.comSymetrix, Inc. • Lynnwood, WA USA • Tel [phone] • Fax [phone] • www.symetrixaudio.com
Symetrix, Inc. • Lynnwood, WA USA • Tel [phone] • Fax [phone] • www.symetrixaudio.comSymetrix, Inc. • Lynnwood, WA USA • Tel [phone] • Fax [phone] • www.symetrixaudio.com
Symetrix, Inc. • Lynnwood, WA USA • Tel [phone] • Fax [phone] • www.symetrixaudio.com
APPLICATIONS
Studio recording
Mastering
Feedback suppression in sound
systems
Room tuning
Radio and TV broadcast
Post production sweetening
551E
551E Five Band Parametric EQ
UPERIOR FIDELITY, FLEXIBILITY, POWER, AND PRECISION. That’s what sets the
551E Five Band Parametric Equalizer apart from the rest. Delivering an unbeatable
combination of wide dynamic range, ultra-low distortion, minimal phase shift and ringing, easy to
use controls, and rock-solid construction, the 551E is a leap forward in equalizer technology.
FEATURES
Proprietary topology delivers
extremely low noise and
distortion
Five identical, fully overlapping
EQ bands
High cut and low cut filters
Servo balanced output (elimi-
nates DC offset)
Direct coupled inputs and
outputs (superb low frequency
response)
Internal power supply with
detachable cord
The five, fully parametric EQ bands are
identical in function. Each delivers up to 12 dB
of boost and 20 dB of cut, and each has an
adjustable bandwidth control (from .05 octaves
to 2 octaves) and a frequency control range
from 10 Hz to 20 kHz. Use each band
anywhere in the audio spectrum, not just the
pre-selected ranges you find on most equalizers.
This can be very useful in sound system work,
among other things. For instance, you can use
three bands to correct low frequency problems
and still have two bands left for midrange and
high frequency work.
You’ll find the 551E is just as useful for
recording and broadcast applications. The
wide control range allows you to perform
creative as well as corrective equalization.
Sweetening vocal tracks, getting that huge
drum sound, disk mastering, or perfecting your
radio station’s signature sound are the kinds of
tasks that are well within the 551E’s capability.
As for sonic quality... Our proprietary topology
delivers extremely low noise audio performance
- the kind you would normally expect only
from a much more expensive unit. We’ve also
included a servo balanced output that com-
pletely removes all DC offset. Direct-coupled
input and output stages maximize the 551E’s
low-frequency response while minimizing noise
and distortion.
Inside and out, the 551E is designed to stand
up to the worst road abuse. The tour-worthy
all steel chassis houses a double-sided fiberglass
circuit board - unlike the flimsy phenolic PCBs
found in most budget priced units. Gold plated
XLR connectors, a bypass relay, and high
precision components ensure accuracy and
reliability. Last, but not least, the 551E has an
internal power supply with a detachable cord.
If you are an engineer in concert sound,
installed systems, recording, or broadcast,
contact your nearest Symetrix dealer today. See
for yourself why the audiophile performance
and uncompromising design of the 551E Five
Band Parametric Equalizer make it the right
choice for any professional audio application. •
BAND 5
BANDWIDTH CUT/BOOSTCUT/BOOST
BAND 4
FREQUENCY BANDWIDTHCUT/BOOSTFREQUENCY BANDWIDTH
BAND 3
FREQUENCY
0
850350 1.0
1.5K
2K100 .05 2.0 -20 +12
0
350 850 1.0
140
X1
X10
1.5K140
0
1.0
850350
X1
X10
1.5K
X1 140
X10 X0.1X0.1X0.1 2K100 .05 2.0 -20 +12 2K100 .05 2.0 -20 +12
(OCT)(OCT)(Hz) (dB) (dB)(OCT)(Hz) (Hz) (dB)
BAND 2
BANDWIDTH
FREQUENCY
BAND 1
BANDWIDTHFREQUENCYHIGH CUT CUT/BOOSTLOW CUTINPUT
SYSTEM CUT BANDS
850 0
1.0
350
0
1.5K140
X1
X10
350 850 1.0
18K
1.5K
42K X1 5K
115 X10 140
X0.1X0.1
65K3K 100 2K .05 +122.0 -20 2K100 .05 2.0 -20
5022
U
ACTIVE
E
8
BYPASS
551
EQUALIZER
PARAMETRIC
FIVE BAND
POWER CLIP -15 260+15 6
LEVEL (dB) (OCT)(Hz) (dB) (OCT)
(Hz) (dB)
+12
CUT/BOOST
S

Publication ©1997 Symetrix, Inc. Symetrix, Inc. • Lynnwood, WA USA • Tel [phone] • Fax [phone] • www.symetrixaudio.comSymetrix, Inc. • Lynnwood, WA USA • Tel [phone] • Fax [phone] • www.symetrixaudio.com
Symetrix, Inc. • Lynnwood, WA USA • Tel [phone] • Fax [phone] • www.symetrixaudio.comSymetrix, Inc. • Lynnwood, WA USA • Tel [phone] • Fax [phone] • www.symetrixaudio.com
Symetrix, Inc. • Lynnwood, WA USA • Tel [phone] • Fax [phone] • www.symetrixaudio.com
551E Five Band Parametric EQ
The Parametric Equalizer (EQ) shall be a
single channel unit that shall provide five
independent bands of proportional-Q type
filtering. There shall also be separate high-
pass and low-pass filters. The unit shall
occupy one rack space (1U).
The EQ shall incorporate five identical filter
bands. Each band shall have the following
controls and control ranges: a cut/boost
control with a -20 dB - +12dB range, a
frequency sweep control with a 100 Hz -
2kHz range, a frequency range multiplier
switch with X10, X1, and X.1 settings, and
a bandwidth control with a .05 octave - 2.0
octave range. There shall also be a 12 dB/
Oct high-pass filter with a user adjustable
cutoff frequency range 1Hz to 250 Hz, and
551E ARCHITECTS AND ENGINEERS SPECIFICATIONS
SPECIFICATIONS
Input/Output
Maximum Input Level +22 dBu Balanced
Maximum Output Level +22 dBu Balanced, +18 dBu Unbalanced
Input Impedance 20k Ohms Balanced, 10k Ohms Unbalanced
Output Impedance 300 Ohms Balanced, 150 Ohms Unbalanced
Performance Data
Frequency Response +0 dB, -3 dB (20 Hz to 62 kHz)
Dynamic Range >114 dB
Signal to Noise Ratio >96 dB (unweighted, ref to +4 dBu, eq in, all bands flat)
THD+Noise (1 kHz at +4 dBu) <0.002% (<10 Hz to 30 kHz measurement bw,
eq in, all bands flat)
EQ Band Control
Frequency Control Range 10 Hz - 20 kHz (inc. Frequency Switch)
Cut/Boost Range -20 dB, +12 dB
Bandwidth .05 oct - 2.0 oct
input signal of +22 dBu and have a
maximum output level of greater than +22
dBm. There shall be a front panel clip
indicator that will illuminate at 1dB below
clipping. It shall monitor the input, output
and each EQ band.
The inputs shall be direct coupled, active
balanced designs terminated with 3-pin
XLR (AES/IEC standard wiring), and ¼"
TRS female. The input circuitry shall
incorporate RFI filters. There shall be a
servo-balanced, 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
Specifications subject to change without notice.
a 12 dB/Oct low-pass filter with a cutoff
frequency range from 2.5 kHz to 60 kHz. A
front panel input level control shall provide
±15 dB of gain adjustment.
When the unit is inoperative (either by loss
of power or via the BYPASS switch), the
inputs and outputs will be wired together
by a 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 20Hz - 62 kHz (+0, -3dB). The
total harmonic distortion plus noise shall
be less than 0.002% (EQ in, all bands flat).
The dynamic range shall be greater than
114 dB. The EQ shall accept a maximum
connected to 117V nominal AC, 95-130V,
50-60 Hz (230V nominal AC, 165-255V, 50
Hz where applicable). Power consumption
shall be 15 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 551E Five Band Parametric
Equalizer.
551E
E
LYNNWOOD, WA, USA
MANUFACTURED IN
FIVE BAND PARAMETRIC EQUALIZER
INPUTOUTPUT
BALANCED/
UNBALANCED
BALANCEDBALANCED
12 3
INPUT
BALANCED/
UNBALANCED
551
TIP = HIGH(+) = PIN 2
21 3
OUTPUT
RING = LOW(-) = PIN 3
SLEEVE = GND = PIN 1
RING
TIP
SLEEVE
PERSONNEL.
TO QUALIFIED SERVICE
PARTS. REFER SERVICING
NO USER SERVICEABLE
THIS UNIT CONTAINS
15 WATTS
MAXIMUM
AC INPUT
FABRIQUÉ AUX E.-U. PAR SYMETRIX INC., LYNNWOOD, WASHINGTON.
RÉFÉREZ TOUTE RÉPARATION À UN TECHNICIEN QUALIFIÉ.
TYPICAL BALANCED CONNECTIONS
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) 1.72 x 19 x 8.25 inches, 4.37 x 48.26 x 20.955 centimeters
Shipping Weight 8 lbs, 3.64 kg
Electrical
Power requirements 117V nominal, 95 to 130V AC, 50 to 60 Hz, 15 watts
230V nominal, 165 to 255V AC, 50 Hz, 15 watts