Velodyne Acoustics HGS-15X THX - Manual (Page 11)

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Subwoofer outputs
The Velodyne subwoofer is designed to operate using the full range audio signal
for input when using the built-in crossover. Some processors/receivers, have a
"subwoofer out" jack that is internally filtered and designed to be used with a
conventional amplifier and speaker. In some rare cases, combining both an external
crossover and the one internal to the subwoofer may result in low output and
increased noise. In these installations you may need to bypass the internal
crossover in either the processor or Velodyne subwoofer. In some installations,
simply setting one crossover to a higher frequency (such as 120 Hz) will restore
maximum performance. To bypass the subwoofer's internal crossover when the unit
is being fed a low pass signal from another crossover, simply locate the switch
marked X-over, OUT - IN on the rear panel of the subwoofer and set to the OUT
position. This will eliminate the internal crossover from the signal path. Note: If not
using an external performance.
Figure 1: Installation Using Line-Level Inputs
AMPLIFIER
MAIN OUTPUTS
RIGHT LEFT
TO SATELLITE SPEAKERS
PRE-AMP
MAIN OUTPUTS MAIN INPUTS
LEFT RIGHT RIGHT LEFT
Figure 2: Installation Using Speaker-Level (from amplifier) Inputs
INTEGRATED AMP / RECEIVER SATELLITE SPEAKERS
MAIN OUTPUTS
(speaker-level)
Speaker-Level Connection
Figure 2 shows an easy way to connect your Velodyne subwoofer directly to your
receiver or integrated amplifier. When connected in this fashion, your satellite
speakers will be crossed over at 80/100Hz, which removes the lower bass from your
speakers, enabling them to do a better job reproducing high frequencies. You may
also connect your satellites directly to your receiver or amplifier along with the
subwoofer if you wish to bypass the internal high-pass crossover.
Caution!!! To avoid damage to your main amplifier, be sure to maintain correct
polarity when making all connections. Red (positive) to red, and black (negative)
to black. Be sure that all connections are tight, and that there are no loose strands
or frayed wires.