KRK S8.4 User Manual page 6

[13] VOLTAGE SELECTOR SWITCH (S12.4 ONLY)
Use this switch to select the proper mains voltage that is supplied to the unit.
*The S8.4 and S10.4 feature automatic voltage selection, therefore those models do not have this switch present.
[14] IEC POWER CONNECTOR
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 and contact your retailer or distributor if it is missing when purchased.
[15] FUSE HOLDER
Under normal operation the fuses should not blow. A blown fuse usually indicates an overload or fault condition. To
change the fuse, remove the power cord, pry off the fuse block with a small flathead screwdriver and change the blown
fuses with the same type and value.
NOTE: If the fuse blows immediately upon power up, this indicates a fault condition and the subwoofer should be returned
to KRK for repair.