Behringer XR4400 manual Compensation of interference with balanced connections

MULTIGATE PRO XR4400

Output			Cable		Input
Pin 1					Ground
	2	1	Shield	1	2
Pin 2	= (+) Signal		(+) Signal + Hum		Positive	(+)Hum + Signal
		3	(-) Signal + Hum		3
Pin 3	= (-) Signal				Negative	(-)Hum + Signal
						2 x Signal
			RFI and Hum			= Signal + 6 dB

Fig. 3.1: Compensation of interference with balanced connections

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!

3. INSTALLATION 11