Shure SE22 Schematic
D
H
222 HARTREY AVE., EVANSTON, IL. 60204
The SE22 is a two-channel, solid-state, equalized
preamplifierlline amplifier designed to provide the
highest quality disc reproduction for broadcast and
recording studio applications. While primarily de-
signed for stereo use, it may be very effectively
utilized for two separate monophonic channels.
Features include:
c
Precise RIAAINAB equalization.
c
Completely solid state.
c
High-impedance inputs properly match almost all magnetic disc reproducers.
Individual high- and low-frequency equalization trimmers on each channel.
Individual channel level controls.
c
Extremely low noise and rf susceptibility.
c
Full line output capability.
PROFESSIONAL PRODUCTS
-
U.
S. A. AREA CODE 3121328-9000 CABLE: SHUREMICRO
Output lmpedance
For 600 or 150 ohm balanced line (approximately
80 ohms actual)
DATA]
+I
m
(0)
SPECIFICATIONS
Frequency Response
RIAAINAB disc playback characteristic within
+I
dB from 30 to 15,000 Hz (NAB 1964 Disc
Standard, recommended low frequency roll-off
dBIoctave, 3 dB down at 20 Hz)
Gain
54 dB, adjustable
Distortion
Less than 0.5% THD at +20 dBm from 30 to
20,000 Hz
Channel Separation
Hum and Noise
At least 60 dB below +6 dBm output (gain set
+6 dBm output with 5 mV input, 32 to 18,000
for
Hz
bandpass filter)
lnput lmpedance
47,000 ohms
10,000 Hz, 50 dB minimum
1,000 Hz, 50 dB minimum
100 Hz, 42 dB minimum
FIGURE
SE22
A
WITH
COVER
MODEL
Operating Temperature
Within 0.5 dB of all specifications at -7 to 57°C
(20 to 135°F)
-
Overall Dimensions
6
See Figure B
Weight
2.57 kg (5 Ib, 14 oz)
Operating Voltage
120 volts t10% at 50-60 Hz. 240 volts +-lo% at
50-60 Hz. (See section on 240-volt operation)
FIGURE
OVERALL
CONTROLS, CONNECTIONS,
AND OPERATION
Inputs
lnput jacks (phono type) are located on the rear
panel and designated "A" and "B." Channel level
controls and output terminals are correspondingly
lettered. Any magnetic pickup designed for operation with a 47,000 ohm input termination may be
directly connected to these jacks.
The SE22 may be used either as a stereo preamplifier or as two separate monophonic channels.
If a stereo cartridge is to be used (with its channels
B
DIMENSIONS
Copyright
27A1289
(PC)
1976,
Shure
Brothers
Inc.
Printed
in
U.S.A.
paralleled) as a monophonic source to one channel
SE22, the SE22 input should be shunted with
of the
a
47,000 ohm resistor or the high frequency trimmer
should be readjusted for proper high frequency
equalization.
Outputs
Output terminals appear on the rear panel as
shown in Figure C. Outputs are balanced and
designed to feed a 150 ohm or 600 ohm line.
120
n
'0
Z
-t10
W
"7
Z
%
0
LL
W
?-lo
a
J
W
LL
-20
20 50 100 1.000
TYPICAL
FREQUENCY
EFFECT
OF
FIGURE
IN
HERTZ
RESPONSE
E
10.000 20,000
TRIMMERS
REAR
PANEL
FIGURE
C
Channel Level Controls
These controls are located on the front panel
designated as
Level" and
"B
Level." They are
"A
used to adjust the overall operating level of the
SE22 and to balance the individual levels of the
two channels.
Response Trimmers
To allow for balancing the response of the two
channels of a stereo cartridge, or of two mono-
phonic cartridges, high- and low-frequency re-
sponse, trimmers are provided for each channel.
D
Figure
shows the location of these controls and
Figure E shows the range and character of the
response change obtainable.
220/240
Volt Operation
The power transformer may be restrapped for
operation with a
220/240 volt ac supply. To make
this change, see instructions on the circuit diagram
for revising the power transformer connections.
Guarantee
This Shure product is guaranteed in normal use
to be free from electrical and mechanical defects
for a period of one year from the date of purchase.
Please retain proof of purchase date. This guaran-
tee includes all parts and labor.
Shipping Instructions
Carefully repack the unit and return it prepaid to
the factory. 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.
RESPONSE
TOP
VIEW
TRIMMERS
(COVER
FIGURE
REMOVED)
D
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