15
551E
552E
/
Specifications for the 552E
Technical Specifications
Chassis Size 3.5"H x 19" W x 8" D
8.89cm H x 48.3cm W x 20.32cm D
Shipping Weight 11 lbs, 5kg
AC Requirements via internal supply
117V AC, nominal, 95-130V AC, 50-60 Hz
230V AC, nominal, 165-255V AC, 50 Hz
Power Consumption 20 watts, maximum
In the interest of continuous product improvement, Symetrix, Inc.
reserves the right to alter, change, or modify these specifications
without prior notice.
Copyright, 1998, Symetrix, Inc. All rights reserved.
The parametric equalizer (EQ) shall be a dual
channel unit that shall provide five indepen-
dent filter bands per channel. There shall also
be separate high-pass and low-pass filters per
channel. The unit shall occupy two rack
spaces (2U).
Each filter band shall have the following
controls and control ranges: a cut/boost
control with a -20 dB to +12 dB range, a
frequency sweep control with a 100 Hz - 2kHz
range, a frequency range multiplier switch with
X10, X1, and X0.1 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
of 6Hz to 260 Hz, and a 12 dB/Oct low-pass
filter with a cutoff frequency range from 3kHz
to 65 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
to 62 kHz (-0.5dB, -3dB). The total harmonic
distortion plus noise shall be less than 0.002%
Architects and Engineers Specifications
Chapter 10
Maximum Input Level +21 dBu balanced
Maximum Output Level +21 dBu balanced
+17 dBu unbalanced
THD+Noise (1kHz at +4dBu) <0.002%
(<10 Hz to 30 kHz measurement bw)
-eq in, all bands flat
Signal to Noise Ratio >96 dB (unweighted, ref to +4dBu)
-eq in, all bands flat
Dynamic Range >114 dB
Frequency Response -0.5 dB, -3dB (20 Hz - 62 kHz)
Input Impedance 20k ohms balanced, 10k ohms unbal.
Output Impedance 300 ohms balanced, 150 ohms unbal.
EQ band Control Specs:
Frequency Control Range 10 Hz - 20 kHz (inc. Frequency Switch)
Cut/Boost Range -20 dB, +12dB
Bandwidth .05 oct - 2.0 oct
per channel (EQ in, all bands flat). The dynamic
range shall be greater than 114 dB. The EQ
shall accept a maximum input signal of +21 dBu
and have a maximum output level of +21 dBu.
There shall be front panel clip indicators for
each channel that will illuminate at 1dB below
clipping. These indicators 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
connectors. The input circuitry shall incorpo-
rate RFI filters. There shall be servo-balanced,
direct-coupled outputs that shall terminate in 3-
pin XLR (AES/IEC standard wiring) and ¼"
TRS connectors.
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, Inc. model 552E
Dual Five Band Parametric Equalizer.
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