Velodyne Acoustics CHT-15 User Manual
CHT-15
Owner's Manual
Audio/Video Subwoofer System
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
Caution
To reduce the risk of electric shock, do not remove cover (or back). No user-serviceable parts inside.
Refer servicing to qualified service personnel.
The lighting flash with arrowhead symbol is intended to alert the user to the presence of uninsulated
"dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a
risk of electric shock to persons.
The exclamation point symbol is intended to alert the user to the presence of important operating and
maintenance (servicing) instructions in the literature accompanying the subwoofer.
1. Read Instructions -- All safety and operating instructions should be read before the subwoofer is operated.
2. Retain Instructions -- The safety and operating instructions should be retained for future reference.
3. Heed Warnings -- All warnings on the subwoofer and in the operating instructions should be adhered to.
4. Follow Instructions -- All operating and use instructions should be followed.
5. Water and Moisture -- The subwoofer should not be used near water -- for example, near a bathtub, washbowl,
kitchen sink, laundry tub, in a wet basement, near a swimming pool or the like.
6. Carts and Stands -- The subwoofer should be used only with a cart or stand recommended by the manufacturer.
7. Wall or Ceiling Mounting -- The subwoofer should be mounted to a wall or ceiling only as recommended by
the manufacturer.
8. Ventilation -- The subwoofer should be situated so that its location or position does not interfere with its proper
ventilation. For example, the subwoofer should not be situated on a bed, sofa, rug, or similar surface that may
block the ventilation openings; or placed in a built-in installation such as a bookcase or cabinet that may impede
the flow of air through the ventilation openings.
9. Heat -- The subwoofer should be situated away from heat sources such as radiators, heat registers, stoves,
or other subwoofers that produce heat.
10. Power Sources -- The subwoofer should be connected to a power supply only of the type described in the
operating instructions or as marked on the subwoofer.
11. Power-Cord Protection -- Power-supply cords should be routed so that they are not likely to be walked on or
pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience
receptacles, and the point at which they exit from the subwoofer.
12. "Caution: To prevent electrical shock, match wide blade of plug to wide slot, fully inserted." "Attention: Pour eviter
les chocs electriques, introduire lame la plus large de la fiche dans la borne correspondante de la prise et
pousser jusqu' au fond".
13. Cleaning -- The subwoofer should be cleaned only as recommended by the manufacturer.
14. Nonuse Periods -- The power cord of the subwoofer should be unplugged from the outlet when left unused for
a long period of time.
15. Object and Liquid Entry -- Care should be taken so that objects do not fall and liquids are not spilled onto the
enclosure.
16. Damage Requiring Service -- The subwoofer should be serviced by qualified service personnel when:
a. The power-supply cord or plug has been damaged.
b. Objects have fallen or liquid has been spilled into the subwoofer.
c. The subwoofer has been exposed to rain.
d. The subwoofer does not appear to operate normally or exhibits a marked change in performance.
e. The subwoofer has been dropped or damaged.
17. Servicing -- The user should not attempt to service the subwoofer beyond what is described in the operating
instructions.
All other servicing should be referred to qualified service personnel.
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Congratulations!
Congratulations on your purchase of a Velodyne subwoofer system. This
system represents the state of the art in low frequency reproduction. Read
and follow the instructions below 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. 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. Record the serial number in the space
provided on the warranty card for future reference.
Product Features and Controls
● Built-in 300 watt (RMS) power amplifier
● Subwoofer Direct - switchable crossover bypass
● Adjustable (40 to 120Hz) low-pass crossover
● Selectable (80 or 100Hz) high-pass crossover
● Line-level inputs & outputs
● Speaker-level inputs & outputs
● Signal sensing auto turn on/off with bypass option
● Variable volume control
● Variable phase control (0 to 180 degrees)
● Dual staggered low-pass crossover; 12dB/octave initial, 24dB/octave
ultimate
● Anti-clipping circuit
● Over excursion protection
continued. . .
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Installation
Your new subwoofer system provides for a number of installation options.
Read all the installation information below in order to determine which
installation option is best for your system. Remember to perform all
installation procedures with system power turned off.
Inputs
Your new subwoofer is equipped with both speaker-level and line-level
inputs. Use the LINE-IN jacks when connecting your subwoofer to a preamp, signal processor, or line-level crossover. The FROM AMPLIFIER
jacks connect directly to the speaker outputs of a integrated amplifier or
receiver. Your amplifier section will notice no additional loading effects
when you use these inputs because of their high impedance. Note: Do not
use both LINE-IN and FROM AMPLIFIER inputs simultaneously.
Volume control
This control allows you to balance the output from the subwoofer to the
main speakers in your system. This control should be set to achieve similar
volume level from both the main speakers and subwoofer.
Low-pass crossover
Both sets of inputs sum the left and right channels together and the
resulting signal is passed through an adjustable low-pass crossover before
being amplified. The crossover control allows you to adjust the upper limit
of the subwoofer's frequency response from 40 to 120 Hz. The subwoofer's
response will begin rolling off above the frequency you set this control to.
You should set the crossover frequency to obtain a smooth and seamless
transition from the subwoofer to the main speakers in your system. If your
main speakers are smaller units with limited low frequency output, you
may wish to choose a higher frequency (such as 100-120Hz) than you
would with larger speakers which have greater low frequency output. With
larger speakers, you might start with this control set lower, such as 80Hz.
Subwoofer Direct
A bypass switch is also provided if you wish to use an external crossover.
If you are not using an external crossover, we recommend that you use the
one provided within the unit for optimum performance.
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