Velodyne Acoustics Audio Video Subwoofer System User Manual

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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 lightning 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 st and 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; orplaced 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.”

13. Cleaning — The subwoofer should be cleaned only as recommended by the manufacturer.

14. Nonuse Periods — Thepower 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.

18. The apparatus shall not be exposed to dripping or splashing water and that no objects filled with liquids, such

as vases be placed on the apparatus.

19. The disconnect device (the appliance inlet) shall remain readily operable (easily assessable).

All other servicing should be referred to qualified service personnel.

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User’s Manual

Audio/Video Subwoofer System

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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 and
will provide you with years of listening pleasure when properly cared for.
Read and follow this instruction manual to insure safe and proper
system connection and operation.

Caution!

Please observe the following precautions to insure safe and proper
system operation.

• Frequency response of 28 - 120 Hz

• Multiple staggered low-pass crossovers; 12 dB/octave initial,
48 dB/octave ultimate

• Driver Displacement Control circuit prevents over excursion
and amp clipping

• Blue power indicator LED

• High-excursion EPDM rubber surround

• Oversized spider for linearity at high excursion

P

PREPARE FOR INSTALLATION

Note: 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 or service representative.

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. Record the serial
number in the space provided on the warranty card for future reference.

PRODUCT FEATURES

• 8” (6.5” piston diameter) driver with 2.5” high-temp voice coil and
107 ounce magnet/204 ounce motor structure

• Built-in 2000 watts Dynamic/1000 watts RMS high efficiency
Class D amplifier

• Adjustable (40 to 120 Hz) low-pass crossover (defeatable)

• Line-level (RCA) inputs and outputs

• LFE Input

peaker-level input

• S

• Signal sensing auto turn on/of

ariable volume control

• V

• Select

able phase control (0° or 180°)

s with five way binding post connections

f (defeat

able)

Your new Velodyne subwoofer provides for a number of installation
options. Read all the installation information below in order to determine
which installation option is best suited for your system. Remember to

perform all installation procedures with system power turned off to
prevent possible damage.

PLACEMENT

True subwoofers operate at extremely low frequencies which are
primarily omni-directional. While it is recommended that the subwoofer
be placed on the same plane as the satellite speakers, room and system
conditions often dictate otherwise. Keep in mind that frequency
response and output level can be drastically influenced by placement,
depending on the acoustic properties of the listening room. Typically, the
optimum location for a subwoofer is tucked away in a corner of your
listening room. This location will usually offer the greatest output levels
and optimum low frequency extension. The worst location for a
subwoofer is typically far away from any walls and close to the center of
your room. Avoid these locations when possible. When using a pair of
Velodyne subwoofers in stereo, it is preferable to place each subwoofer
by the satellite of the same channel.

Caution! This subwoofer has electronics built into the cabinet. Do
not place the cabinet next to sources of heat such as furnace
registers, radiators, etc. Do not place the unit near sources of
excessive moisture, such as evaporative coolers, humidifiers, etc.
The power cord should be routed in such a way that it will not be
walked on, pinched or compressed in any way that could result in
damaging the insulation or wire.

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Regardless of where you install your Velodyne subwoofer, it must remain
in an upright position (woofer facing forward). Using, shipping or storing
the subwoofer in any other position for an extended period of time may
result in damage to the unit not covered by warranty.

Your new Velodyne subwoofer, like any good speaker system, requires
proper positioning within the listening space to provide maximum
performance. Improperly placed speakers may degrade the sound
quality and reduce your listening pleasure. Depending on the size and
type of furnishings in the room, perfect placement may not be possible.
Finding the best location within your environment will likely require some
experimentation. We suggest you experiment with the location during
setup to find what sounds best to you when seated in your typical
listening position.

INSTALLATION

Inputs

Your new subwoofer is equipped with speaker-level and line-level inputs.
Use the LINE LEVEL jacks when connecting your subwoofer to a pre­amp, signal processor, line-level crossover or receiver with pre-amp
level outputs. The SPEAKER LEVEL jacks connect directly to the
speaker outputs of any amplifier, integrated amplifier or receiver. Your
amplifier section will notice no additional loading effects when you use
these inputs due to their very high impedance.

Important!!!
Do not use both LINE LEVEL and SPEAKER LEVEL
connections simultaneously!

Volume Control

This control allows you to balance the output from the subwoofer to the
main speakers/amplifier in your system. This control should be set to
achieve similar output level from both the main speakers and subwoofer
when listening to music. A good starting point for the volume control is 3
or 4 dots from minimum.

Low-pass Crossover - 40 to 120 Hz

All inputs sum the left and right channels together, with the resulting
signal p
amplified.
the subwoofer

assing through an adjustable low-pass crossover before being

The crossover control allows you to adjust the upper limit of

’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 100-120 Hz) 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 80 Hz.

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!

Phase Adjustment - 0°/180°

This control allows you to “reverse” the phase of the subwoofer’s output
signal 180° to correct for any possible mismatch and resulting
cancellation between the subwoofer and your main speakers/amplifier.
To adjust, simply listen to the system with music playing. Then move the
switch from one position to the other and listen for a change in low
frequency output. The correct position will have a greater amount of
apparent low frequency output.

Crossover Switch - INTERNAL X-OVER/SUBWOOFER DIRECT

This switch allows the internal crossover circuitry to be removed from the
signal path. This is required in certain installations which route the signal
through external processors with a crossover circuit of their own, such
as the new digital units. Simply move the switch to SUBWOOFER
DIRECT to disengage the built-in crossover. For all other installations
which do not have a separate electronic crossover, we recommend
you leave the switch set to INTERNAL X-OVER to provide
optimum performance.

Auto Turn on Function

With this function in the “auto” position, your subwoofer can be safely left
with the main power switched on continuously. The subwoofer will turn
itself on automatically when an audio signal is present. If no signal is
present for approximately 10 minutes, the unit will switch to standby
mode. While in standby mode, your subwoofer will draw very minimal
power. This function can be disabled by leaving the switch in the
“on” position.

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