25
AUTOCOM PRO MDX1400
7.1.2 Transformer Balanced Outputs (Optional)
In contrast to electronic balancing, the use of transformer-balanced outputs offers the advantage of galvanic
separation between units. Electrical potential differences and ground loops in audio installations do not
therefore impair the performance of the units.
The transformer-balanced outputs, commonly used in radio and TV engineering, can also be fitted retrospec-
tively upon request. The BEHRINGER transformer OT-1 is designed to the highest exacting standards and is
available as an accessory.
The audio inputs and outputs on the BEHRINGER AUTOCOM PRO are fully balanced. If possible, connect the
unit to other devices in a balanced configuration to allow for maximum interference immunity.
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Please ensure that only qualified persons install and operate the AUTOCOM PRO. During
installation and operation the user must have sufficient electrical contact to earth. Electro-
static charges might affect the operation of the AUTOCOM PRO!
Unbalanced use of
mono 1/4" jack plugs
Ring
Balanced use of
stereo 1/4" jack plugs
Balanced use with XLR connectors
1
2
3
2
1
3
Input
Output
Tip =
Signal
Tip =
hot (+ve)
Sleeve =
Ground / Shield
Sleeve =
Ground / Shield
Tip
Tip
Sleeve
Sleeve
Strain relief clamp
Strain relief clamp
Ring =
cold (-ve)
For connection of balanced and
unbalanced plugs, ring and sleeve have
to be bridged at the stereo plug.
1 = Ground / Shield
2 = hot (+ve)
3 = cold (-ve)
For unbalanced use pin 1 and pin 3 have to be bridged
Fig. 3.2: Different plug types
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Never use unbalanced XLR connections with microphone cables, as this would short-circuit
any phantom power transmitted over these cables!
7. AUDIO CONNECTIONS
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