SPL M/S Master 1020, Руководство пользователя

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10
M/S Master
Rear Panel
Connections
XLR sockets
All signal connections are made via balanced XLR connectors. Inputs are always female and
accept male connectors; outputs are always male. All in all, a very comprehensible principle.
Balanced connections
It is impossible to exclude interferences when a single audio signal is transmitted. Shielding
is effective against electric, but not against electromagnetic influences. Motors, transfor-
mers, and alternating current can always induce interferences. But even if the transmission
would succeed, differences in ground potentials between driver and receiver would produce
disturbances.
In balanced connections a reference signal with reversed polarity is transmitted additionally
to the audio signal through a second wire. The ground signal is routed separately through
a third wire. Input and output stages are drivers and receivers, and the receiving stage can
suppress interferences by subtracting the difference between audio and reference signal.
Unbalanced connections
Unbalanced connections from and to RCA or 1/4“ TS sockets can be made without adaptors to
the balanced XLR sockets. The correct wiring is important. The diagram shows the pin confi-
guration of the XLR sockets and how to correctly connect them for unbalanced connections:
Connections to RCA sockets are always unbalanced, a wiring to jack connectors can be both
balanced (1/4“ TRS/stereo jack) or unbalanced (1/4“ TS/mono jack). We recommend to use
individually configured cables from XLR to RCA or jack sockets instead of adaptors. You can
get cables in any needed configuration from audio dealers. With the diagram above, the
dealer can ensure to provide the appropriate cable for your application.
Power connection and fuse
Connect the power cord to the rear MAINS INPUT socket. Transformer, power cord and case
connection conform to VDE, UL and CSA requirements.
The fuse is accessible from outside and placed right behind the flap right from the socket.
Fuse ratings are 315 mA slow blow (230 volts) or 630 mA slow blow (115 volts).
Input Output
balanced unbalanced balanced unbalanced
1=GND
2=hot (+)
3=cold (-)
1 2
3
1 2
3
1 2
3
1
2
3
0
I
0
I