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signal flow
unit A output
AES/EBU
ULTRAMATCH
input
1 2
3
2 1
3
shield
cable
Fig.3.1: Balanced Connections (AES / EBU) to the ULTRAMATCH
3.3.2 Unbalanced Coaxial Connections (SPDIF)
The figure below shows how to connect the unbalanced inputs and outputs correctly by means of RCA
cables. Basically, the connections are identical to unbalanced audio connections in stereo systems, for
example when connecting a CD player to an amplifier.
Good results have been achieved independently of the selected cable. We recommend to use conventional
line cables with a length of less than 10 m. However, for longer distances or exacting demands, use XLR or
TOSLINK cables.
signal flow
shield
tip
tip
sleeve
sleeve
cable
unit A output
S/PDIF
ULTRAMATCH
input
Fig.3.2: Unbalanced Connections (SPDIF) to the ULTRAMATCH
3.3.3 Optical Connections (SPDIF)
The figure below shows how to connect the optical inputs and outputs correctly. The optical system called
TOSLINK makes use of other connectors than the ones employed in light wave conduction, though the sys-
tems are basically identical.
Optical connections are naturally unaffected by electric interference, easy to connect, and amazingly rugged.
Unfortunately, they are said to cause extremely high jittering in the data stream, thus decreasing the sound
quality of the decoded audio signal significantly although this fairy tale has not been proved yet. What is
more, optical connections do not cause any jittering even at cable lengths of 10 m (whereas in practice there
are often problems caused by transition resistors in RCA plugs or damaged cables). The real problems of
distribution of standard (and customized) cables and their excessive prices.
3. INSTALLATION