Velodyne Acoustics HGS-15X THX - Manual (Page 16)

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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 the finest subwoofer available anywhere!
In this new subwoofer, we have combined our radical new driver and
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.
Note: Do not move unit while turned on or plugged in!!! Do not
leave unit in direct sunlight or use in high humidity environments!!!
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 extremely heavy. Use
caution when lifting of 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.
with 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. One that is capable of
running cool to the touch and providing 1250 watts (RMS) and 3000 watts
peak power! At typical listening levels, the HGS-15X THX Ultra 2
produces less than 0.5% harmonic distortion with input signals extending
to 20Hz and below. Even at their maximum output level, 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 turn off the master power switch
on the rear panel.
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continued. . .