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DESCRIPTION
The Shure Model SE30* Gated Compressor/Mixer is a
high-quality gated memory compressor combined with a
self-contained, portable, three-input mixer and remote
amplifier designed specifically for professional appli-
cations in AM, FM, and TV broadcasting, film, tape, and
disc recording, CATV, and sound reinforcement. An acces-
sory cover is available (A100A) which covers the front
controls and provides a handle, as well as a support stand
for tilting the front panel upward for easier vision of con-
trols during operation. An accessory rack-mount kit
(A100B) is available for permanently installed program
compressor applications.
Features include:
Three transformer coupled inputs, switchable, low im-
pedance microphone or line level.
Individual feedback-type level controls for each input
to provide maximum clipping and minimum noise levels
over a wide dynamic range.
Low-frequency roll-off switch for each input.
Input 1 switchable on front panel to low-distortion, 1 kHz
tone oscillator.
Mix bus jack for adding additional mixers for additional
input capability.
Feedback-type output control (located after compres-
sion attenuator) to provide optimum output noise level
regardless of setting.
Binding posts for balanced 600-ohm line output plus
professional three-pin male audio connector switchable
from line to microphone level output.
Two-level headphone monitor jack for 600 to 2,000 ohm
headphones.
Compression range of 40 dB, with a slope or compres-
sion ratio of approximately 10 to 1 in the normal oper-
ating range.
Gated Memory with a meter indicator to minimize
“pumping.”
True average-responding compression to maximize
output level regardless of peak-to-average ratio of pro-
gram material, either music or speech. (Peak responding
circuit to reduce gain rapidly for significant increases in
the input signal.)
Response rate (averaging time constant) adjustment on
front panel to compensate for various types of program
material.
Extremely low distortion, noise, and RF susceptibility,
with wide, flat frequency response at any level of com-
pression.
+18 dB output capability.
Dual-scale illuminated meter for output VU indication
or dB compression.
+4 or +6 dBm range switch for VU meter.
AC or battery operation with built-in battery supply using
readily available 9-volt batteries.
*Unless otherwise noted, information applies to both SE30 and SE30-2E models.
(Model SE30 shown)
Automatic, noiseless switch-over to batteries in the
event of ac line failure.
Battery-check switch to check battery condition with-
out interrupting operation of unit.
Detachable ac line cord.
Auxiliary meter lamp operates independently from a “D”
type dry cell for meter illumination when ac power is
not available.
Auxiliary high level input and output on phone jacks for
special applications (approximately --20 dBV).
Microphone and line inputs and outputs phase indi-
cated.
Stereo parallel jack for synchronizing the compression
circuits of two units.
Listed by Underwriters’ Laboratories and Canadian
Standards Association (SE30 only).
GUARANTEE
This Shure product is guaranteed in normal use to be
free from electrical and mechanical defects for a period
of one year from date of purchase. Please retain proof of
purchase date. This guarantee includes all parts and
labor. This guarantee is in lieu of any and all other guar-
antees or warranties, express or implied, and there shall
be no recovery for any consequential or incidental
damages.
SHIPPING INSTRUCTIONS
Carefully repack the unit and return it prepaid to:
Shure Brothers Incorporated
Attention:
Service Department
1501 West Shure Drive
Arlington Heights, Illinois 60004
If outside the United States, return the unit to your dealer
or Authorized Shure Service Center for repair. The unit
will be returned to you prepaid.
SPECIFICATIONS
Frequency Response:
Flat ±2 dB, 30 to 20,000 Hz.
Gain:
(Below compression threshold, output terminated,
Line 600 ohms, Microphone 150 ohms, Aux. 47 K
ohms.)
Noise:
Equivalent input noise: -129.5 dBV maximum (Micro-
phone input, 150 ohms, 20 kHz equivalent noise band-
width with lower cutoff frequency of 300 Hz, at full
gain.)
Equivalent input hum and noise: -126 dBV maximum
(same as above, but lower cutoff frequency of 20 Hz.)
Output: (Input controls minimum):
3