Symetrix, Inc. • Lynnwood, WA USA • Tel 425-787-3222 • Fax 425-787-3211 • www.symetrixaudio.com
Symetrix, Inc. • Lynnwood, WA USA • Tel 425-787-3222 • Fax 425-787-3211 • www.symetrixaudio.com
Symetrix, Inc. • Lynnwood, WA USA • Tel 425-787-3222 • Fax 425-787-3211 • www.symetrixaudio.com
Symetrix, Inc. • Lynnwood, WA USA • Tel 425-787-3222 • Fax 425-787-3211 • www.symetrixaudio.com
Symetrix, Inc. • Lynnwood, WA USA • Tel 425-787-3222 • Fax 425-787-3211 • 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/BOOST
CUT/BOOST
BAND 4
FREQUENCY
BANDWIDTH
CUT/BOOST
FREQUENCY
BANDWIDTH
BAND 3
FREQUENCY
0
850
350
1.0
1.5K
2K
100
.05
2.0
-20
+12
0
350
850
1.0
140
X1
X10
1.5K
140
0
1.0
850
350
X1
X10
1.5K
X1
140
X10
X0.1
X0.1
X0.1
2K
100
.05
2.0
-20
+12
2K
100
.05
2.0
-20
+12
(OCT)
(OCT)
(Hz)
(dB)
(dB)
(OCT)
(Hz)
(Hz)
(dB)
BAND 2
BANDWIDTH
FREQUENCY
BAND 1
BANDWIDTH
FREQUENCY
HIGH CUT
CUT/BOOST
LOW CUT
INPUT
SYSTEM
CUT BANDS
850
0
1.0
350
0
1.5K
140
X1
X10
350
850
1.0
18K
1.5K
42K
X1
5K
115
X10
140
X0.1
X0.1
65K
3K
100
2K
.05
+12
2.0
-20
2K
100
.05
2.0
-20
50
22
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
