JL Audio Dominion d108 Owner's Manual page 17

| d108 & d110
"Grounded / Isolated" Switch
This feature is included to address signal grounding issues often encountered
in home theater systems when several components from different manufacturers
are interconnected. The "Grounded / Isolated" Input Mode switch on the rear
connection panel alters only the "RCA Inputs" and is designed to facilitate a quiet,
hum-free connection to your audio or home theater system. This switch has no
effect on signals connected to the "Speaker Level" inputs.
The Dominion™ ships with this switch in the "Isolated" position. If, with all
system components connected and turned on (but no source material playing), you
hear a continuous low-frequency hum through your Dominion™, flip this switch
to the "Grounded" position and evaluate the difference in the noise level. Use
whichever switch position provides the least hum or noise.
IEC-Style AC Power Connector
The IEC-style AC cord receptacle receives the heavy-gauge, 6 ft. (1.8 m) long,
power cord included with your Dominion™. Subwoofers sold in different parts
of the world are configured for each market's electrical system and include
appropriate plugs on their power cords. Please note the voltage markings next
to the AC Connector and make sure you are only powering the Dominion™ from
a receptacle that matches these markings. Do not use any AC power cord other
than the one supplied with the Dominion™. For information about the Main Fuse
Holder, please see the Troubleshooting section of this manual.
The Dominion™ subwoofer is a powerful device and can draw a lot of current.
If too many components are connected with a Dominion™ to one electrical outlet,
you risk tripping a household circuit breaker during very demanding program
material. If this happens, split the Dominion™ and other components between two
AC electrical circuits.
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