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INSTALLATION
Input Connections
XLR CONNECTORS
AND PHONE JACKS
The amplifier input circuit is electronically balanced. Each
channel is equipped with a T/R/S phone jack wired with the
tip for signal high (+), the ring for signal low (—) and the
sleeve for chassis ground. These jacks are wired in parallel
with each other and with an XLR connector in which pin 2 is
the "hot" or signal high (+) terminal, pin 3 is signal low (—),
and pin 1 is ground. This XLR wiring conforms to the JIS/
DIN/IEEE international standards.
ATTENUATOR
ELECTRONICALLY
BALANCED INPUT
AMPLIFIER
INVERTING
AMPLIFIER
ELECTRONICALLY
BALANCED
INPUT
AMPLIFIER
Fig.3 INPUT
As of this date, there is no clear standard in the United States
for the polarity of connections on the XLR
connector.
If
opposite amplifier polarity is required, or if the equipment
driving the amplifier uses pin 3 as its "hot" lead, the input
cable wiring should be reversed from this convention. If using
. an XLR-fitted cable, rewire it or, preferably, use a polarity-
reversal adaptor.
Both
the XLR
and phone jack inputs may be used at the
same time for the purpose of "daisy chaining" the signal to
another input; the dual input connections should not be used
to
"mix"
two
signal
sources
to feed
a given
amplifier
channel.
(Sole channel of mono amp, or
Channel B of stereo amp)
(Sole channel of mono amp, or
Channel A of stereo amp)
CHANNEL — А (MONO
INPUT
Patch cord between channels
From
Signal
.
Source
Fig. 4A
"DAISY CHAIN" WITH XLR & PHONE JACKS
(Sole channet of mono amp, ог
Channel B of stereo amp)
CHANNEL
B
INPUT
(Sole channel! of mono amp, ог.
Channel A of stereo amp)
CHANNEL =A (мою)
Patch cord between channels
From
Signal
Source
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