Behringer XR4400 [6/14] The design concept
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Behringer XR4400 [6/14] The design concept

Behringer XR4400 [6/14] The design concept
6 MULTIGATE PRO XR4400 User Manual
2. The Design Concept
2.1 High quality components and design
The philosophy behind BEHRINGER products guarantees a no-compromise circuit
design and employs the best choice of components. The operational ampliers
NJM4580 which are used in the MULTIGATE PRO, are exceptional. They boast
extreme linearity and very low distortion characteristics. To complement this
design the choice of components includes high tolerance resistors and capacitors,
detent potentiometers and several other stringently selected elements.
For the rst time, the MULTIGATE PRO XR4400 uses SMD technology
(SurfaceMounted Device). These sub-miniature components known from
aerospace technology allow for an extreme packing density, plus the unit’s
reliability could be improved. Additionally, the unit is manufactured in
compliance with a ISO9000 certied management system.
2.2 Inputs and outputs
2.2.1 Balanced inputs and outputs
As standard, the BEHRINGER MULTIGATE PRO is installed with electronically
servo-balanced inputs and outputs. The new circuit design features automatic
hum and noise reduction for balanced signals and thus allows for trouble-free
operation, even at high operating levels. Externally induced mains hum etc.
willbe eectively suppressed. The automatic servo-function recognizes the
presence of unbalanced connectors and adjusts the nominal level internally to
avoid level dierences between the input and output signals (correction 6 dB).
3. Installation
Your BEHRINGER MULTIGATE PRO was carefully packed in the factory and
the packaging was designed to protect the unit from rough handling.
Nevertheless,we recommend that you carefully examine the packaging and its
contents for any signs of physical damage, which may have occurred in transit.
◊ If the unit is damaged, please do not return it to us, but notify your
dealer and the shipping company immediately, otherwise claims for
damage or replacement may not be granted. Shipping claims must be
made by the consignee.
Please take the time to complete and return the warranty card within 14 days of
the date of purchase, otherwise you will lose the right to the extended warranty.
Or just use our online-registration (behringer.com).
3.1 Rack mounting
The BEHRINGER MULTIGATE PRO ts into one standard 19" rack unit of space
(1¾"). Please allow at least an additional 4" depth for the connectors on the
back panel. Be sure that there is enough air space around the unit for cooling
and please do not place the MULTIGATE PRO on high temperature devices such as
power ampliers etc. to avoid overheating.
3.2 Mains voltage
Before you connect your MULTIGATE PRO to the mains, please make
sure that your local voltage matches the voltage required by the
unit! Thefuse holder on the female mains connector has 3 triangular
markers, withtwo of these triangles opposing each other. YourMULTIGATE
RPO is set to the operating voltage printed next to these markers,
and can be set to another voltage by turning the fuse holder by 180°.
CAUTION:thisinstructiondoes not apply to export models exclusively
designed, e.g.for115Voperation!
3.3 Audio connections
The audio inputs and outputs on the BEHRINGER MULTIGATE PRO are
fully balanced. If possible, connect the unit to other devices in a balanced
conguration to allow for maximum interference immunity.
◊ Please ensure that only qualified persons install and operate the
MULTIGATE PRO. During installation and operation the user must have
sufficient electrical contact to earth. Electrostatic charges might affect
the operation of the MULTIGATE PRO!
1 2
3
2 1
3
Pin 1
Output Cable Input
Pin 2 = (+) Signal
Positive
Pin 3 = (-) Signal
Shield
(+) Signal + Hum
(-) Signal + Hum
Negative
(+)Hum + Signal
(-)Hum + Signal
2 x Signal
Ground
RFI and Hum
= Signal + 6 dB
Fig. 3.1: Compensation of interference with balanced connections

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