Wilson Audio WATCH Dog Subwoofer Series-2 - Manual (Page 50)

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Note: We recommend that you turn the main power switch on the rear of
amplifier to the off position and disconnect the power cord during lightning
storms or when you are away.
Section 6.1 - Notes From David A. Wilson on Using the Test CD
Wilson Audio has provided a test CD to aid you in the setup of your WATCH
Dog subwoofer. The following comments and recommendations refer most precisely
to the use of the WATCH Dog subwoofer in a two-channel music system. However,
these procedures can also be used to optimize the WATCH Dog to the left and the
right channels of a multi-channel home theater system.
Subwoofer Placement
The WATCH Dog possesses sophisticated low pass filter control features, as
well as the ability to continuously vary phase angle. As a result, placement of the
WATCH Dog is not as critical as with most other designs. The WATCH Dog can be
successfully placed between and slightly behind the left and right speakers. However,
because of its flexible control, the WATCH Dog is equally successfully placed in a vari-
ety of locations in the listening room - such as on a side wall or behind the listener.
Filtering of LF to the Left & Right Speakers
With two-channel music systems in moderate sized rooms, where high volumes
are not required, the left and right speakers are often run full range. This is particularly
true when Wilson Audio speakers are used, as a reult of their low distortio and robust
power-handling capabilities. The usual rationale for this approach is that the “full-
range” signal will lose some of its midrange and high frequency transparency going
through the active high pass crossover. While this is theoretically true, what is more
important is the more complex low frequency room interaction that will occur between
the subwoofer’s output and the full range output of the L and R channels. This LF
interaction is greatly reduced if LF to the L & R speakers is filtered out. For the great-
est finesse in music reproduction you should experiment with both approaches.