Genesis I.C.E. 12t - Manual (Page 7)

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LFE Input
The Low Frequency Effects (LFE) input allows the S2/12t to be used
for augmentation of the surround speakers as well as for the LFE of
your home theater system. The LFE input blends the low frequency
effects signal from the home theatre processor into the normal input
signal on the subwoofer. We call this our LFE Blend™ technology.
The LFE input bypasses the internal crossover, and hence uses the
home theatre processor’s crossover. This means that the S2/12t can
be used to augment the surround speakers as well as deliver the LFE
channel without resorting to digital bass management on the
processor.
On the home theatre processor, set the front speakers to “LARGE” and
sub-woofer to “YES”. Then, connect the sub-woofer (LFE) line-level
output from the processor to either the single-ended RCA or balanced
XLR “LFE IN” connector on the S2/12t. Do not use both inputs at the
same time.
We recommend that single-ended interconnects be no longer than 10
feet (3m). Hence, we have provided balanced LFE inputs. If your
processor is further than 10 feet from the S2/12t, please use a high-
quality balanced cable.
If your processor has only single-ended outputs and is further than 10
feet from the S2/12t, we recommend that you consider using an active
(or passive) signal balancing device to convert the unbalanced output
signal from your processor to a truly balanced signal. A truly balanced
signal will give you the benefit of maximum noise rejection and
maximum signal fidelity over long cable runs.
The unbalanced interconnect which connects your preamp to the
balancing device should be shorter than 4.5 feet (1.5 meters). You can
then use a balanced interconnect to connect the output of the signal
balancing device to the input of the S2/12t.
An added benefit of the S2/12t is that the servo-amplifier incorporates an
active signal-balancing device. This means that if your processor has
only single-ended outputs, but you can place an S2/12t close enough to
use a single-ended interconnect, that balanced output of that subwoofer
can be used to daisy chain to the rest of the system.