KRK 12sHO User Manual page 12

lines). This is because there is a ground loop through the sub panel, mains wiring, source, and back to the
subwoofer on Pin-1 of the Audio inputs. Ground currents traveling through this loop impose different
voltages along the path at different gain stages within the circuitry, thus creating noises.
The Ground lift switch does not affect the AC mains/panel safety ground. It does not 'open' the connection
thru Pin-1 to the panel, but increases the resistance (from zero ohms to one thousand ohms) to reduce
the ground current and induced noises. Safety is not affected.
Figure 2.2 – Bottom Section of the Rear Panel
(10) POWER SWITCH
The power On/Off switch is located on the rear panel. The triangle in the KRK logo on the rear plate
illuminates when power is applied.
(11) AC INPUT VOLTAGE SELECTOR
To change the AC Input Voltage, remove the power cord and slide the voltage selector to the desired
voltage setting. Please note that when making voltage changes, the fuses will have to be replaced (refer
to the Changing Fuses section below).
(12) AC INPUT INLET SOCKET
A standard IEC-type AC Inlet Socket is used to provide power to the subwoofer. Be sure to use the power
cord that is included with the product or one that is rated equal or greater than 240V, 15A.
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