Velodyne Acoustics VRP-1000 - Manual (Page 11)

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Interconnect Cables
When installing your new Velodyne subwoofer using the line level
connections, you should always use shielded phono cables. There
are many high quality cables available today. It is recommended that
you keep the length of cable as short as possible to avoid any
potential noise problems.
When using speaker level connections, use a high quality speaker
cable that mates well with the connectors. Be very careful to avoid
any loose strands or frayed wires that may result in a short, which
may damage your equipment. 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.
Care of Your Subwoofer
Your Velodyne subwoofer does not require any regular maintenance.
Normal dusting or cleaning of the surface for appearance purposes
is all that is required. We suggest you avoid any harsh detergents or
chemicals when cleaning the cabinet. Abrasives, detergents, or
cleaning solutions may damage the finish on the cabinet. We
recommend using only a damp cloth to clean the cabinet.
During normal conditions, your new subwoofer may be left on
continuously without any problems. The unit is equipped with a
signal-sensing turn on/off that will automatically turn on the unit
when a signal is present at the inputs and turn off the unit after
several minutes when there is no longer any signal at the inputs.
Protection Circuitry
Your new subwoofer is equipped with circuitry to provide maximum
performance with greatest reliability.
The unit is protected against:
1) Overheating the amplifier.
2) Excessive drop in power line voltage.