Velodyne Acoustics HGS-12X - Manual (Page 14)

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Congratulations!
Congratulations on your purchase of a Velodyne subwoofer system. This
system represents the absolute state of the art in accurate low frequency
reproduction. We believe this to be one of the finest subwoofers available
anywhere! In this new subwoofer, we have combined our radical new
driver & amplifier designs to obtain our traditionally accurate sound while
increasing efficiency and output to new standards. This exceptional
subwoofer will provide you with years of unparalleled listening pleasure.
Enjoy!
Caution!
Please observe the following instructions to insure safe and proper system
operation.
Warning!
To prevent fire or shock hazard, do not expose this equipment to rain or
moisture. To avoid electrical shock, do not open speaker enclosure or amp
chassis cover. Please observe all warnings on the equipment itself. There
are no user serviceable parts inside. Please refer all service questions to
your authorized Velodyne dealer.
Prior to installation
Please unpack the system carefully! This unit is heavy. Use caution when
lifting or moving to avoid injury. Remove all staples used to seal the carton
as they can scratch the cabinet. Please save the carton and all packaging
materials for future use. Packing this unit in any other carton may result in
severe damage when shipping. Please take a moment to record the serial
number and date/location of purchase in the space provided on the
warranty card for future reference.
Important Note: Do not move unit while plugged in!
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control system is a low mass accelerometer rigidly attached to the voice
coil. The accelerometer continuously monitors cone motions, providing a
feedback signal for the servo control circuitry. This high-gain system is
designed to improve linearity and reduce distortion approximately 30 times
over conventional non-servo systems. While the input signal is being sent
to the amplifier which powers the driver, a continuous signal representing
cone motion is being sent to a comparator circuit. This circuit constantly
adjusts for any deviation between the input signal and the subwoofer's
output. This self regulation results in extreme control over cone movement,
and very accurate low distortion sound.
To provide the power for driving this massive loudspeaker, we incorporated
an extremely efficient Class D switching amplifier. This new amplifier
features our patent pending energy recovery circuit design which drastically
reduces wasted energy (heat) as compared to traditional switching designs.
One that is capable of running cool to the touch and providing 1000 or 1250
watts (RMS - depending on the model) of power! At typical listening levels,
the HGSX produces less than 1% harmonic distortion with input signals
extending to 20Hz. At higher levels the distortion barely exceeds 1%, far
better than any conventional design currently on the market. This combination
provides you with the best combination of clean, deep, accurate bass,
without making any sacrifice to distortion.
Care of Your Subwoofer
Do not use any harsh detergents or chemicals to clean the cabinet.
Abrasives, detergents, or cleaning solutions may damage the finish on the
cabinet. We recommend using 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 unplug the unit.