Yamaha MS2022 - Manual (Page 5)

3
Rear Panel
CAUTION: TO PREVENT ELECTRIC
SHOCK, MATCH WIDE BLADE OF
PLUG TO WIDE SLOT, FULLY INSERT.
9 INPUT LINE 3
The output of any standard audio source can be connected
to this RCA pin jack.
0 VOLTAGE SELECTOR (Only for models other than U.S.
and Canadian models)
Use the voltage selector to match your AC power supply –
either 230V or 240V.