Behringer Ultramatch Pro SRC2496 User Manual

ULTRAMATCH PRO SRC2496 User Manual

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Fig. 5.1: Unbalanced transmission to the ULTRAMATCH PRO

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Fig. 5.2: Unbalanced transmission from the ULTRAMATCH PRO

5.3.1  Balanced XLR connection
The digital XLR inputs and outputs are not bound by the AES/EBU protocol. They accept 

and deliver data streams in both the professional and the consumer format. Should the 

RCA input already be occupied by another device, it is even possible to connect the RCA 

output of, say, a CD player to the ULTRAMATCH PRO XLR input by using an adapter. 

To do this, you will need a cable such as the one shown in fig. 5.2, except that 

instead of a female XLR connector, a plug must be mounted.
The following figure illustrates how to correctly connect the balanced input 

and output connectors. Basically, it is the same wiring scheme normally used 

for balanced audio connections such as, for example, the connection between a 

microphone and a mixing console.

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Fig. 5.3: Connecting the ULTRAMATCH PRO in a balanced configuration

Selecting the correct cable is not critical. For distances of less than 20 m, 

generally available microphone cables have no negative effect. For greater 

distances or higher requirements (mobile operation, powerful high-frequency 

fields), however, you should use special 110-Ohm cable with double shielding.

5.3.2  Unbalanced coaxial RCA connection
The RCA inputs and outputs, in turn, are not bound to the S/PDIF format. They accept 

and deliver data streams in both the professional and the consumer format. It is 

even possible to connect the XLR output (e.g. from the BEHRINGER ULTRA-CURVE 

PRO DSP8024 or other equipment) to the RCA input on the ULTRAMATCH PRO by 

using an adapter. Whether or not the reverse will work, namely connecting the 

ULTRAMATCH PRO’s RCA connector to the XLR input of another unit, depends on 

the sensitivity of the XLR input in question. 
The following figure illustrates the correct connection for unbalanced input and 

output connections via RCA plugs. 

Fig. 5.4: Connecting the ULTRAMATCH PRO in an unbalanced configuration

Basically, it is the same wiring scheme as is the norm for unbalanced audio 

connections in hi-fi systems, e.g. between a CD player and amplifier.
For distances less than 10 m, standard coaxial line cable has no negative 

influence. However, should greater distances be involved, you should use XLR.

5.3.3  Optical connection
Toslink optical inputs and outputs are also not bound by the S/PDIF format. 

They accept and deliver data streams in both the professional and the consumer 

format. Optical connections are by nature not sensitive to electric interference 

fields, easy to cable and astonishingly robust.
The following figure illustrates how to correctly connect the optical input and 

output connections.

Fig. 5.5: Connecting the ULTRAMATCH PRO optically via Toslink

5.3.4  Wordclock
Feeding a wordclock signal into the rear BNC connector enables external 

synchronization of the ULTRAMATCH PRO. Wordclock signals are normally 

distributed in a network configuration, i.e. are relayed and terminated 

with 75-Ohm coaxial cable, BNC-T adapters and terminating resistors. 

Commercially available BNC cables are usually used as connecting cables. 

In order to offer maximum flexibility, the ULTRAMATCH PRO’s BNC input 

has a high-impedance design and is not equipped with an internal 75-Ohm 

terminating resistor. Should the ULTRAMATCH PRO be the last device in the signal 

chain, however, it is necessary to put a T-connector into the BNC connector. 

A 75-Ohm terminating resistor (in the form of a short BNC plug) goes on one end 

of the T-connector and the BNC cable from the “master” delivering the wordclock 

signal on the other end.
The following figure shows how to correctly connect the unbalanced 

wordclock input. The wiring scheme is the same as is used for networking in 

computer technology and you can thus obtain the appropriate accessories 

(commercially available cable, T-connectors, terminating resistors) in specialist 

computer shops.