Velodyne SPL-R Series - Manual (Page 8)

A W o r d A b o u t Yo u r R e c e i v e r ’ s C r o s s o v e r
a n d t h e S P L - R C r o s s o v e r
Your Velodyne SPL-R subwoofer is designed to operate using the full range audio signal for input
when using the built-in crossover (controlled by the dial on the back panel). Many home theater
processors/receivers (Dolby Digital
® , DTS ® , THX ® ) have a “subwoofer out” jack that performs
this same function and are designed to be used with a powered subwoofer.
In these installations, you may want to bypass the crossover in either the processor or the
Velodyne subwoofer. In some cases, you may want to use BOTH crossovers. To do this, you can
use both your processor’s crossover and the one internal to the Velodyne sub. You should
stagger the frequencies, (i.e., 120 Hz subwoofer, 80 Hz processor) for best results.
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 “LOW-PASS CROSSOVER” on the rear panel
of the subwoofer and turn it counterclockwise to the leftmost position. This will eliminate the
internal crossover from the signal path.
Note: If you are not using an external crossover, you should use the built-in crossover for
optimal performance. When using a single RCA sub out from the processor, connect to the
“L” - LFE input on the subwoofer.
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 using speaker level connections, use a quality speaker cable that mates well with the
connectors (at least 14-gauge). Be very careful to avoid any loose or frayed strands that could
result in a short, causing a dangerous condition and possible damage to your unit. Cables of
extremely large size are typically not required. Extremely large gauge wire may not properly fit
in the binding posts, resulting in a poor connection and possible short circuits.
P l a c e m e n t
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 for a subwoofer is in a front
corner of your listening room. This location will usually offer the greatest output levels and
optimum low frequency extension. The worst location for a subwoofer is typically far away from
any walls, close to the center of your room and near an opening or doorway. Avoid these
locations when possible. When using a pair of Velodyne subwoofers in stereo, it is preferable
to place each subwoofer by the satellite of the same channel. Typically, a minimum distance
of one to two feet from your TV to the subwoofer will be adequate to avoid any
magnetic interference.
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SPL-R User’s Manual
Int erconnect Cables