BSS Audio OPAL Series DPR-944 Owner's Manual - Manual (Page 10)

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5.0 Audio Connections
Audio Connections
5.1 Main Inputs There are 2 input sockets on the rear panel of the DPR 944, Inputs 1 and 2.
Each is electronically balanced on standard 3 pin female XLRs at an
impedance greater than 10k Ohms. The ‘HOT, + or in phase’ connection is to
pin 2 and the ‘COLD, -, or out of phase’ connection is to pin 3. Pin 1 is
internally connected to the chassis earth via a low value capacitor. This
ensures freedom from ground loops whilst allowing good EMC performance.
The screen of the input cable should be connected to pin 1 to ensure that EMC
regulations are being met, and the cable shield ground should also be
connected to the equipment which is providing the input signal.
Fig 5.1
Fig 5.2
Fig 5.3
5.2 Main Outputs The output signals are electronically balanced and fully floating on 3 pin
male XLRs. Full headroom is available into any load of 600 Ohms or greater.
The signal ‘HOT, +, or in phase’ signal is to pin 2, the ‘COLD, -, or out of
phase’ signal is to pin 3, with pin 1 being connected directly to the chassis.
When feeding the DPR 944 from unbalanced sources, connect the signal
conductor to pin 2 and the cable screen to pins 1 and 3.