Velodyne Acoustics SPL-800 - Manual (Page 15)

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continued. . .
Care of Your Subwoofer
Your Velodyne subwoofer does not require any regular maintenance.
Normal dusting or cleaning of the surface for appearance purposes are 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. If you plan to leave the subwoofer unused for an
extended period of time, we recommend that you turn off the master power
switch on the rear panel.
The unit is protected against:
1) Overdriving the speaker or amplifier.
2) Overheating the amplifier.
3) Excessive drop in power line voltage.
The first type of protection circuitry which prevents overdriving of the
speaker or amplifier operates constantly without being audible under most
situations. In some extreme situations (sustained high output levels such
as pro sound usage), the unit may shut down momentarily. This indicates
operation of the thermal or undervoltage protection circuitry. If this should
happen, you should reduce the volume setting or shut the unit off until
normal operating conditions return. You may also want to plug the unit
into a different wall outlet, as dropping power line voltage will be most
noticeable under strenuous conditions and may result in the unit shutting
down intermittently.
Protection Circuitry
Your new subwoofer is equipped with special protection circuitry to
provide maximum performance with greatest reliability.
strands or frayed wires which 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.