Velodyne Acoustics HGS-12X - Manual (Page 9)

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 crossover, you should use the built-in
crossover for optimal performance.
Interconnect Cables
When installing your new Velodyne subwoofer using the line level connections,
you should always use shielded phono cables. There are many decent
cables available today, most any of which will work perfectly well. We do
recommend that you keep the length of cable as short as possible to avoid
any potential noise problems.
When routing cables, try to keep them away from equipment which
generates significant noise such as industrial or digital equipment.
Placement
True subwoofers operate at extremely low frequencies which are primarily
omni-directional. While it is recommended that the subwoofer be placed
on the same plane as the satellite speakers, room and system conditions
often dictate otherwise. Keep in mind that frequency response and output
level can be drastically influenced by placement, depending on the
acoustic properties of the listening room. Typically, the optimum location
When installed in this fashion, your satellite speakers will be crossed over
at 80Hz which removes the lower bass from your amplifier and speakers,
enabling them to do a better job reproducing high frequencies. By utilizing
this method, you will have a bi-amplified system, gaining improved power
and headroom for your system.
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/
continued. . .
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
6 5
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