Genesis I.C.E. 928 - Manual (Page 8)

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We recommend against the use of an extension cord for the AC
power. If you are forced to use an extension cord, make certain that it
is as heavy duty an extension cord as you can find. The G928 running
at full tilt can draw up to 10amps from your power supply, so make
sure that whatever you plug your subwoofer into can handle that!
Speaker-level connections
To connect the high level inputs of the
Genesis 928 subwoofer, take the
output of your power amplifier and,
using a good quality speaker cable,
connect to the binding posts on the
back of the Genesis 928 subwoofer.
You may also take the signal off of the
back of your main loudspeaker
terminals if this is more convenient.
Make sure that you maintain proper
polarity. This means that the plus (+)
terminal of your amplifier must be
connected to the plus (+/red) terminal
on the back of the Genesis 928.
Using the high level inputs to feed the
Genesis 928 power amplifier will not degrade the sound quality of
either your main system or the Genesis 928 subwoofer.
Line-level connections
As an alternative, you can use the low-level inputs on the G928. Using
a high quality interconnect cable, connect your preamplifier’s output to
the low level inputs on the back of the subwoofer.
We strongly recommend that you do not use interconnects longer than
10 feet (3.2 meters) to connect the preamplifier outputs to your
Genesis 928 subwoofer. On many preamplifiers, using an interconnect
that is too long will negatively affect the performance of your
preamplifier because of the high capacitance of the cable across the
output of your preamplifier.
If your preamplifier does not have two outputs, use a good quality “Y”
connector to split the signal. The Genesis servo subwoofer amplifier
presents a high impedance load, which is a very easy load to your
preamplifier and can be easily used with the “Y” connector with no
degradation to your main signal.