sound systems, or any situation in which the mains power is suspect, it is wise to confirm appropriate
voltage and line polarity BEFORE connecting the instrument to power source.
13. GROUND LIFT SWITCH
This switch is used to disconnect the signal ground from the mains and chassis earth ground. You
may set the switch to the LIFT position if ”Hum”, caused by a ground loop, can be heard at the
speakers.
14. INPUT/OUTPUT CONNECTORS
1/4 TRS
The TRS (Tip Ring Sleeve) connector is balanced and wired as tip = Hi (+), Ring = Lo (-), and Sleeve
= Ground.
CAUTION: Only one of these sockets can be chosen for audio connection at the same time.
XLR
The XLR input connector is balanced and wired as Pin 2=Hi (+), Pin 3=Lo (-), and Pin 1=Ground.
CAUTION: Only one of these sockets can be chosen for audio connection at the same time.
RCA PHONO
The RCA Phono input is unbalanced at the tip = Hi (+) and the Sleeve = Ground.
CAUTION: Only one of these sockets can be chosen for audio connection at the same time.
FOR BALANCED CONNECTIONS
Wire the connectors as follows:
Phone Jack
Connection
tip =
high
ring =
low
sleeve =
ground
FOR UNBALANCED CONNECTIONS
Use 1/4 inch tip-ring-sleeve or mono phone plug connectors or RCA phone jack connectors wired as
follows:
Phone Jack
Connection
tip =
high
8
