Velodyne VMS-8 User Manual

VMS

VMS-8

Subwoofer

USER’S

MANUAL

Small, High-Performance Subwoofer

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VMS User’s Manual

i

o

Table of Contents

Congratulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Prepare for Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Line-Level Connection - Option A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Line-Level Connection - Option B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Speaker-Level Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Subwoofer Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Interconnnect Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Care of Your Subwoofer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Protection Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Troubleshooting and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Velodyne Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

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VMS User’s Manual

ii

Congratulations!

Congratulations on your purchase of a Velodyne VMS subwoofer system. This system
represents the state-of-the-art in home audio 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 instructions to insure safe and proper system operation.

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
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. 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 page 12 for future reference.

. Please observe all

Product Features

• A single driver consisting of:

- 8” (6.5” piston diameter) driver with 2.5” high-temp voice coil and

204 ounce magnet structure

• Built-in 2000 watts Dynamic/1000 watts RMS high ef

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

• Line-level (RCA) inputs and outputs

• LFE Input

• Speaker-level inputs with five way binding post connections

• Signal sensing auto turn on/off (defeatable)

• Variable volume control

• Selectable phase control (0° or 180°)

• 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

ficiency Class D amplifier

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VMS User’s Manual

1

Prepare for Installation

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 for your
system. Remember to perform all installation procedures with system power turned off to

prevent possible damage.

Placement

The first step in installing your new VMS is to determine where it will be placed in the room.
Unpack the system carefully and use the following guidelines in order to find the best
room placement option.

True subwoofers operate at extremely low frequencies which are primarily omni-directional.
Keep in mind that frequency response and output level can be drastically influenced by
placement, depending on the acoustic properties of the listening room. To obtain optimum
output from your subwoofer, place it within a foot of a corner. This location will offer the greatest
output levels and optimum low frequency extension. If at all possible, your subwoofer should be
placed along a wall. 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 near the satellite of the
same channel.

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.

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.

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 sour
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.

ces

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VMS User’s Manual

2

Installation

Your new subwoofer is equipped with speaker-level and line-level inputs. Use the LINE LEVEL
jacks when connecting your subwoofer to a pre-amp, 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 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 three or
four dots from minimum.

Warning:

Some manufacturers preset their receivers with the Sub-Out channel signal at a minimum level.
It is ver
as your front right and left channels. Refer to your receiver manual for the individual channel
level adjustment procedure. If your receiver Sub-Out channel is set too low, the subwoofer may
appear to have a weak output, it may sound noisy or distorted, and the Auto On/Off feature
may not operate properly.

y important to verify that your receiver Sub-Out channel is set to the same output level

Low-pass Crossover - 40 to 120 Hz

All inputs sum the left and right channels together, with the resulting signal passing 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 -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
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 mid-bass frequency output. The
correct position will have a greater amount of apparent mid-bass frequency output.

, we recommend that you use the one provided within the unit for

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VMS User’s Manual

3

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
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 “inactive” position.

Warning:

If the Sub-Out channel signal level from your receiver is too weak, this feature will not operate
properly

Power Switch

The master power switch is located on the lower half of the unit. This rocker style switch is the
main on/off for the unit. This switch should be set to position 1 (up) for on, and 0 (down) for
off. If the unit is to be left unused for an extended period of time, the master power switch
should be turned off.

. See VOLUME CONTROL section on previous page.

, we recommend you leave the switch set to

Subwoofer Outputs

The Velodyne subwoofer is designed to operate using the full range audio signal for input when
using the built-in crossover. Some processors/receivers have a “subwoofer out” jack that is
internally filtered and designed to be used with a conventional amplifier and speaker. In some
rare cases, combining both an external crossover and the one internal to the subwoofer may
result in low output and increased noise. In these installations you may need to bypass the
internal crossover in either the processor or Velodyne subwoofer. In some installations, simply
setting one crossover to a higher frequency (such as 120 Hz) will restore maximum
performance. To bypass the subwoofer’s internal crossover when the unit is being fed a filtered
signal from another crossover, simply locate the switch marked INTERNAL
X-OVER/SUBWOOFER DIRECT on the rear panel of the subwoofer and set to the SUBWOOFER
DIRECT position. This will eliminate the internal crossover from the signal path.

Note: If not using an external crossover, you should use the built-in crossover for
optimal per

formance.

Line-Level Connection - Option A

Figure 1 shows connection from your home theater receiver to the LFE input on the back of
your subwoofer. When the subwoofer is installed in this fashion, all of the low frequency
information from your “LFE Out” or “Subwoofer Out” on the back of your receiver will pass into
your V
your subwoofer with a 5.1 receiver. (Cable needed: 1 mono RCA cable.)

elodyne subwoofer. This connection is the most common connection method when using

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VMS User’s Manual

4

Figure 1. Installation Using LFE Line-Level Inputs

Note: If not using an external crossover, you should use the built-in crossover for optimal
performance. When using a single channel input (such as a surround sound processor’s
subwoofer out or LFE), the auto on/off circuit sensitivity will be affected. When one input
channel is used instead of two, the unit will see lower signal levels present at the inputs. This
may cause the unit to turn off when listening at low volume levels. If this occurs, simply use a
“Y” adapter (available from most dealers) to allow your processor’s single sub line to be fed into
both L&R inputs. This will make the unit turn on at lower signal levels.

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VMS User’s Manual

5

Line-Level Connection - Option B

Figure 2 shows connection from a pre-amplifier’s main outputs to the left and right inputs of your
Velodyne subwoofer. You will also need to connect a second pair of RCA cables from the outputs
on the back of your subwoofer to the inputs on the back of your amplifier. When the subwoofer
is installed in this fashion, your satellite speakers will be crossed over at 80 Hz which removes
the lower bass frequencies from your external amplifier and speakers, enabling them to do a
better job reproducing the higher frequencies. By utilizing this method, you will have a bi-amplified
system, gaining improved power and headroom for your system. This installation method is not
as common as the method described in Figure 1. (Cables needed: 2 stereo pair of RCA cables.)

Figure 2. Installation Using Stereo Line-Level Inputs

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VMS User’s Manual

6

Speaker-Level Connections

Figure 3 shows an easy way to connect your Velodyne subwoofer directly to your receiver or
integrated amplifier, if it lacks line-level outputs. You may also connect your satellites directly to
your receiver or amplifier along with the subwoofer. Your receiver or amplifier will not notice the
additional load of the subwoofer due to the high input impedance.

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Figure 3. Installation Using Speaker-Level Inputs

Caution!!! To avoid damage to your main amplifier, be sure to maintain correct polarity when
making all connections. Red (positive) to red, and black (negative) to black. Be sure that all
connections are tight, and that there are no loose strands or frayed wires.

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VMS User’s Manual

7

o

Subwoofer Outputs

The Velodyne subwoofer is designed to operate using the full range audio signal for input when
using the built-in crossover. Many home theater processors/receivers (Dolby Digital
THX™) have a “subwoofer out” jack that is internally filtered and designed to be used with a
powered subwoofer. In these installations, you may bypass the internal crossover in either the
processor or the Velodyne subwoofer. In some installations, it may be beneficial to have a
steeper ultimate crossover slope. To do this, you can use both your processor’s crossover and
the one internal to the Velodyne sub. You should stagger the frequencies, (i.e., 120 Hz sub,
80 Hz processor) for best results.

To bypass the subwoofer’s internal crossover when the unit is being fed a low pass signal from
another crossover, simply locate the switch marked INTERNAL X-OVER/SUBWOOFER DIRECT
on the rear panel of the subwoofer and set to the SUBWOOFER DIRECT position. This will
eliminate the internal crossover from the signal path.

®

, DTS®,

Interconnect Cables

When installing your new Velodyne subwoofer using the line level connections, you should
always use shielded phono cables. There are many high quality cables available today. It is
recommended that you keep the length of cable as short as possible to avoid any potential
noise problems.

When using speaker level connections, use a high quality speaker cable that mates well with
the connectors. Be very careful to avoid any loose strands or frayed wires that 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.

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VMS User’s Manual

8

Care of Your Subwoofer

Your Velodyne subwoofer does not require any regular maintenance. Normal dusting or cleaning
of the surface for appearance purposes is 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.

Protection Circuitry

Your new subwoofer is equipped with circuitry to provide maximum performance with
greatest reliability.

The unit is protected against:

1) Overheating the amplifier.

2) Excessive drop in power line voltage.

If either of the above 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.

Troubleshooting and Service

Before seeking service for your amplifier or subwoofer, please re-check all systems. Following
is a simple troubleshooting guide to assist you.

1. Verify that the unit is plugged in and power outlet used is active.

2. Is the power switch on?

3. Is the unit receiving an input signal from your source?

4. Have all controls (volume, crossover, phase, etc.) been properly set?

5. If the unit has been running at high levels, one of the protection circuits may be
engaged. Has the amplifier overheated?

6. Make sure binding posts are tightened.

If the protection circuitry is active, the unit may cycle on and off until operating parameters
return to normal. Under more serious conditions, the unit may shut off completely. Normal
operation should return upon cooling, but you may be required to turn the power off and then
on again to reset the unit.

The following conditions require service by a qualified technician:

1. The power cord has become damaged

2. The unit does not appear to operate normally or exhibits a marked change
in performance

3. The unit has been exposed to water

4. Some part of the chassis or circuitry is physically damaged

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Specifications

Specifications VMS-8

Woofer

Amplifier 2000 watts Dynamic
(Class D) 1000 watts RMS Power

High Pass Crossover 80 Hz (6 dB/octave)

Low Pass Crossover 40 Hz-120 Hz

Frequency Response 26-120 Hz (+/-3 dB)

Harmonic Distortion <5% (typical)

Magnet Structure 204 oz.

Voice Coil 2.5” Dual Layer

Inputs Gold plated line-level and speaker-level

Outputs Line-level, 80 Hz up

8” forward firing
(6.5” piston diameter)

12 dB octave initial,
48 dB octave ultimate

(12.7 lbs)

inner/outer wind

Phase 0° or 180°

Video Shielded No

Dimensions (H/W/D) 10.063” x 10.375” x 12.75”
(inc. feet, grill and knobs) (27 x 26 x 33 cm)

Cabinet Sealed enclosure

Warranty Three years (electronics - parts and labor)

(parts/labor) Five years (drivers - parts and labor)

Shipping Weight (approx.) 35 lbs. (16 Kgs)

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Velodyne Products

115 -120V

®

DD Series

DD-10
DD-12
DD-15
DD-18

Digital Drive 1812

Signature Edition

DEQ-R Series

DEQ-8R
DEQ-10R
DEQ-12R
DEQ-15R

DLS™-R Series

Optimum Series

Optimum-8
Optimum-10
Optimum-12

SMS™-1

SubContractor™

Series

SC-1250

SC-10
SC-12
SC-15
SC-IW

SC-IF/IC

220 - 240V

®

DD Series

DD-10
DD-12
DD-15
DD-18

Digital Drive 1812

Signature Edition

-Q Series

CHT

CHT-8Q
CHT-10Q
CHT-12Q
CHT-15Q

Impact Series

SPLi Series

SPL-800i

SPL-1000i

SPL-Ultra Series

SPL-800 Ultra
SPL-1000 Ultra
SPL-1200 Ultra

SubContractor™

Series

SC-1250

SC-10
SC-12

SC-15
DLS -3500R
DLS -3750R
DLS -4000R
DLS -5000R

Impact Series

Impact -Mini

Impact -10
Impact -12

MicroVee™

MiniVee

MiniVee®10

®

SC-600 Amp

SC-600 IW

SC-600 IF/IC

VDR Series

VDR-10
VDR-12

VMS-8

VX Series

VX-10

®

Impact -Mini

Impact -10
Impact -12

MicroVee™

SMS™ -1

SC-IW

SC-IF/IC

SC-600 Amp

SC-600 IW

SC-600 IF/IC

VX-10 Series II

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FOR YOUR RECORDS. . .

Date Purchased_________________________________________________________________

Dealer_________________________________________________________________________

Serial #________________________________________________________________________

*NOTE: Please complete and return your warranty card within ten (10) days or

Register. . . ON LINE . . . It’s faster . . . and easier

www.velodyne.com

LIMITED WARRANTY - U.S. AND CANADA ONLY

VELODYNE ACOUSTICS, Inc. (“VELODYNE”) warrants all electronics for a period of three years, drivers for a period
of five years, and full range speakers for a period of five years. All VELODYNE products have a warranty from the
date of purchase against defects in materials and workmanship subject to the following conditions:

1.

VELODYNE is not responsible for defects which result from the use of an amplifier or controller other than
the one originally supplied with the unit (subwoofer) or defects which result from modifications or repairs
made by any component of the system by anyone other than a VELODYNE factory authorized
service representative.

2. This warranty is void if any repairs or service covered by the terms of this warranty are made to any
component of the system by anyone other than a VELODYNE factory authorized service representative.

3. VELODYNE is not responsible for damage caused by accidents, abuse, misuse, natural or personal disaster
or unauthorized modification. The VELODYNE products are not intended for professional or commercial use
and VELODYNE is not responsible for damage resulting from such use.

4. The VELODYNE product warranty is limited to units that are purchased from authorized VELODYNE dealers
and finalized within authorized dealer locations.

5. This warranty is nontransferable under any condition.

6. Use of this product outside the U.S. and Canada voids this warranty.

TO OBTAIN SERVICE

Information regarding service may be obtained from the dealer from whom you purchased the unit, or by contacting
VELODYNE customer ser
representative within the warranty period set forth above. If VELODYNE determines the unit is defective, VELODYNE
will, at VELODYNE’s option, repair or replace the product at no charge if the product is forwarded prepaid to a factory
authorized service representative. Products forwarded to the factory authorized service representative should be
shipped securely and properly packaged, insured and freight prepaid.

WARRANTY OUTSIDE THE UNITED STATES AND CANADA

vice. Warranty service must be performed by a VELODYNE factory authorized service

The Warranty of this product if it is sold to a consumer outside of the United States or Canada shall comply with
applicable law and shall be the sole responsibility of the distributor that supplied this product. T
warranty service, please contact the dealer from which you purchased this product, or the distributor that supplied
this product.

.

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o obtain any applicable

VMS User’s Manual

12

63-VMS Rev A MAY09

.

www.velodyne.com

Velodyne Acoustics, Inc.

345 Digital Drive

Morgan Hill, CA 95037

408.465.2800 voice

408.779.9227 fax

408.779.9208 service fax

www.velodyne.com

Service E-mail: [e-mail]

Product E-mail: [e-mail]

echnical E-mail: [e-mail]

T

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