Velodyne Acoustics DLS-3500R - Manual (Page 5)

8
A Word About Your Receiver’s Crossover and the
DLS-R Crossover
Your Velodyne DLS-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
knob marked “LOW-PASS CROSSOVER” on the rear panel of the
subwoofer and turn it counterclockwise to the “DIRECT” 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. When using a single RCA sub
out from the processor, it does not matter which line level input (L/R)
is used.
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 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.
9
Placement
True subwoofers operate at extremely low frequencies, which
are primarily omni-directional. While it is recommended that the
subwoofers 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 your 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 door way.
Avoid these locations when possible. When using a pair of Velodyne
subwoofers in stereo, it is preferable to place each subwoofer near
the satellite of the same channel. Typically, a minimum distance of
1 to 2 feet from your TV to the subwoofer will be adequate to avoid
any magnetic interference.
Caution!
This subwoofer has electronics built into the cabinet. Do not place the
cabinet next to sources of heat such as furnace registers, radiators,
etc. Do not place the unit near sources of excessive moisture, such
as evaporative coolers, humidifiers, etc. The power cord should
be routed in such a way that it will not be walked on, pinched, or
compressed in any way that could result in damaging the insulation
or wire.