Page 14
DPA Series — DPA80/DPA100 Operating Instructions
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Connecting To Your Amplifier: Line Inputs and Outputs
The inputs are made via 3-pin XLR connectors, which are electronically balanced and should
be connected via a high grade twin core screened cable, as follows:
PIN1: Screen (see note below)
PIN2: Hot ()
PIN3: Cold (signal -)
The amplifier is designed to operate with fully balanced equipment and ground loops or loss
of performance may be experienced if connected to unbalanced sources. If it is unavoidable
however, the following wiring should be used. The cable should still be twin core plus screen.
PIN1:
Screen - connected to the chassis of the unbalanced equipment - or left disconnected
at the unbalanced end.
PIN2: Hot ()
PIN3: Cold
(ground
0V)
NOTE: This amplifier is wired to the latest industry recommendations. PIN1 is connected
directly to the chassis/mains earth. If ground loops (mains hum) are encountered remove the
screen connection from the other end of the cable and leave it open circuit. If problems
persist, consult your dealer/supplier.
DO NOT TAMPER WITH OR ALTER ANY GROUND (EARTH) CONNECTIONS INSIDE THE
AMPLIFIER.
For bridged operation input should be made to channel A (or C) only and the channels set for
bridged mode for the appropriate pair of channels. Please see page 43 for details of how to
do this.
Outputs are also made via 3-pin XLR connectors wired as follows:
PIN1: Screen (see note above)
PIN2: Hot ()
PIN3: Cold (signal -)
Note that the rear panel outputs are electronically balanced and so are not galvanically
(electrically) isolated. Front panel outputs are transformer balanced and so are isolated.
XL
R
MAL
E
XLR
FE
M
A
L
E
