Behringer MDX1400 manual Different plug types

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.

+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

Tip =

Signal

Sleeve =

Ground / Shield

Tip

Sleeve

Strain relief clamp

Balanced use of stereo 1/4" jack plugs

Tip = hot (+ve)

Ring = cold (-ve)

Sleeve =

Ground / Shield

Tip

Ring

Sleeve

Strain relief clamp

For connection of balanced and unbalanced plugs, ring and sleeve have to be bridged at the stereo plug.

	Balanced use with XLR connectors
2	1	1	= Ground / Shield	1	2
		2	= hot (+ve)
		3	= cold (-ve)

3	3
Input	Output
For unbalanced use pin 1 and pin 3 have to be bridged

Fig. 3.2: Different plug types

+Never use unbalanced XLR connections with microphone cables, as this would short-circuit any phantom power transmitted over these cables!

7. AUDIO CONNECTIONS 25