Allen&Heath DP 1000 USER GUIDE - Manual (Page 26)

L
INE
O
UTPUTS
IMPEDANCE
BALANCED
TRS
The console outputs are available on 3-pole TRS
impedance balanced ¼” phone jacks. This means
that a 3 wire connection is used with signal hot (+),
signal cold (-) and ground. Signal hot and cold are at
the same impedance and therefore balanced to reject
any interference picked up on the cable. This only
works if the cable is plugged into a 3 wire balanced
input typical of professional amplifiers and audio
equipment. These outputs also work perfectly well
when plugged into unbalanced (2 wire) equipment
such as domestic recorders but without the
interference rejection that balanced connections offer.
The diagram shows how to wire a jack for 3 wire
balanced or 2 wire unbalanced connection. For 2
wire unbalanced connection using a 3-pole TRS jack
link the ring to the sleeve in the plug. This is not
necessary when using a 2-pole mono jack because
the console ring connection is automatically
grounded by the jack plug sleeve.
☺
Tip Use balanced 3-wire connections when you
connect the outputs to balanced equipment with
cables longer than 10 meters. Unbalanced
connections can be used for short cable runs as these
are seldom prone to interference. To reduce
interference pickup avoid running the cables near or
alongside mains power, lighting or computer
equipment and cables.
MONO O
UTPUT
Provides a nominal 0dBu line level mono signal by
summing the post-fader stereo
LR signal. Typical
application is to connect an amplifier to feed a sub-
bass or centre fill loudspeaker. Adjusting the
LR
fader also affects the mono output so that the balance
between the loudspeakers can be maintained.
LR O
UTPUTS
Two stereo outputs are available. An unbalanced low
level –10dBV output on RCA phono jacks is
provided for connection to a 2-track recorder or
domestic amplifier. Use this output to record your
performance or to produce your demo recordings or
backing tracks.
A 0dBu line level output on TRS jacks is provided
for connection to a professional recorder or to an
amplifier/speaker system when the icon
AB outputs
are configured as foldback monitors. In this
configuration you may wish to plug the
LR outputs
into an external graphic equaliser or electronic
crossover system first to feed the amplifiers.
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