Renkforce SA-101U Mode D'emploi page 30

(16) MASTER OUT 2 connection
RCA connection for the downstream amplifier
(17) BOOTH and REC connections
BOOTH
REC
(18) INPUT CH4 MIC connection
Connection for another microphone which can be played back via channel CH4
(19) INPUT CH3 USB connection
Connection for a recording device with USB output which can be played back via channel CH3.
(20) INPUT CH-1 to CH-4 connections
Connections for LINE or PHONO devices to be played back via channels CH-1 to CH-4
LINE
PHONO
(21) SIGNAL GND connection
To prevent hum trouble, an earth connection can be established via this screw clamp between the mixer
and the earth line of the record player (usually black cable with clamp-type socket).
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connection for a second amplifier (e.g. in an adjoining room or for monitor
loudspeakers)
connection for a recording device
connection for devices with LINE level
record player connection