15
Au dio Input and Output Connectors:
Each audio input connector on the rear panel of the 160S is
a gold-plated Neutrik® XLR female connector. The no-compromise approach to the 160S required
that we use gold-plated connectors, due to their high conductivity and low EMI/RFI susceptibility.
The connectors are default wired in
BALANCED
mode (pin 2 hot, AES convention), although supplying
an unbalanced signal presents no difficulty to the 160S.
Pin 1 Lift Switch
: Associated with each
input
connector is a switch labeled
Pin 1 Lift
. Depressing this
switch lifts pin 1 of the input XLR from all ground references. This may be necessary to break a trou-
blesome ground loop which is causing hum in the system.
Un balance Switch
: The
Unbalance
switch is associated only with the
Output
connectors of the 160S.
When it is in the IN position, the output of the 160S is switched from balanced to unbalanced. (See
wiring diagram below.) In the OUT position, the 160S’s outputs are balanced in the “pin 2 hot” con-
figuration. Note that when the output is unbalanced via the switch, there is a 6dB drop in output sig-
nal level. If you do not wish to experience the 6dB drop in output signal level, you may short pin 3
of the output cable to ground, rather than using the
Unbalance
switch.
Gr ound Switch
:
The
Ground
switch, when in the IN position, references the center tap of the output
transformer to the chassis ground. This ensures that the signal from the 160S, regardless of previous
grounding systems earlier in the audio chain, can deliver a chassis-grounded output signal free of
hum and interference to the output connector. The combination of the three switches associated with
the audio input/output connectors ensures that the 160S is versatile enough to interface with any
equipment and can deliver clean audio to the output, free of hum and interference. (See the follow-
ing diagram for details of the
Ground
switch operation.)
Rear Panel
controls
160S
Operating
OUTPUT OPTION
SIDECHAIN
INPUT
SEND
RETURN
OUTPUT
CHANNEL ONE
CHANNEL TWO
INPUT
OUTPUT
PIN 1
LIFT
GROUND
UNBAL
SIDECHAIN
SEND
RETURN
PIN 1
LIFT
GROUND
UNBAL
PROFESSIONAL PRODUCTS
A HARMAN INTERNATIONAL COMPANY
SALT LAKE CITY, UTAH ¥ MADE IN USA
MODEL 160S
XLR:
PIN 1
PIN 2
PIN 3
CONNECTOR
POLARITY
50 WATTS
POWER
120V
50/60Hz
FUSE:
500mA 250V
SLOW
BLOW
¨
W A R N I N G :
T O R E D U C E T H E R I S K
O F F I R E O R E L E C T R I C S H O C K D O N O T
E X P O S E T H I S E Q U I P M E N T T O R A I N O R
M O I S T U R E
R I S K O F E L E C T R I C S H O C K
D O N O T O P E N
A T T E N T I O N :
R I S Q U E D E C H O C
E L E C T R I Q U E - N E P A S O U V R I R
C A U T I O N :
T O R E D U C E
T H E R I S K O F F I R E R E P L A C E
O N L Y W I T H S A M E T Y P E F U S E .
A T T E N T I O N :
U T I L I S E R
U N F U S I B L E D E R E C H A N G E D E
M E M E T Y P E .
MANUFACTURED UNDER ONE OR MORE OF THE
FOLLOWING U.S. PATENTS: 4,234,804 4,316,107
4,329,598 4,331,931 4,377,792 4,403,199 4,409,500
4,425,551 4,434,380 4,454,433 4,471,324 4,473,793
OTHER PATENTS PENDING
2
1
3
Jensen
¨
Output
Transformer
Jensen
¨
Output
Transformer
10k 1W
GND
Switch
GND
Switch
BALANCED FLOATING OPERATION
UNBALANCED FLOATING OPERATION
Chassis
Ground
Chassis
Ground
Chassis
Ground
Ground Switch open
Unbalance Switch open
Ground Switch open
Unbalanced Switch closed
(6dB drop in output level)
+
-
+
-
2
1
3
Chassis
Ground
