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Figure 2 Rear View
1.7 LEVEL / ROOM COMPENSATION / GROUND LIFT
1.7.1 XLR INPUT
ANALOG / DIGITAL - AES/EBU
The sensitivity of the tranformer-balanced
floating input is +6 dBu (1.55 V). The three-
pin female XLR jack is wired in the standard
manner (pin 1 = ground, pin 2 = +, pin 3 = -).
If you are connecting unbalanced analog
sources, you will need to solder a bridge
between pins 1 and 3:
unbalanced
as seen from solder terminals of male XLR
In digital mode, this same XLR input accepts
the digital signal according to the AES/EBU
specification (110 Ohm balanced).
1.7.2 INPUT:
DIGITAL INPUT / THROUGH
This digital input, configured as a 75-Ohm
BNC connector, is intended to receive signal
Active Studio Monitor O 300 D
1
1.7.2.1 Source 1x AES/EBU, monitors
connected with each other via BNC cable
balanced
2
sources in S/P-DIF or AES 3id format. The
incoming digital signal line requires one
75 -Ohm terminator at the very end, as the
O 300 D has no internal termination.
The XLR input and the BNC input are wired
in parallel across a transformer. The fact that
the termination is wired externally allows you
to make connections in a wide variety of
ways:
To obtain an output voltage of 1 Vpp at the BNC-
output connector (with 75 - Ohm terminator),
an input voltage of 5 Vpp at the AES/EBU input
is required. This complies with the rules for
AES/EBU level. If the input level varies, the
output level does so accordingly.
Page 5
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