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Care Of Your Velodyne

This product combines both electronic devices and loudspeakers.
Care must be taken not to damage either unit. Please take every
precaution possible when installing and using the product so
damage does not occur.

● 

Do not allow objects to come in contact with the clear anodized

    aluminum cone, as the cone is very delicate.

● 

Use only damp cloth when cleaning either controller housing or

    speaker. No harsh detergents or chemicals that may damage
    thesurface.

● 

Never expose the Servo-Controller housing to moisture.

● 

DO NOT try to adjust the setup controls in control unit. Refer all

    adjustments to an authorized Velodyne dealer/installer.

● 

If any part of your Velodyne Servo-Controlled subwoofer or

   controller should require service, return unit to your authorized
   dealer. There are no user serviceable parts inside.

Congratulations!

Thank you for purchasing a Velodyne product. Your purchase of a
Velodyne servo-controlled subwoofer for the automobile shows a
desire to achieve the highest possible quality of sound reproduc-
tion. This product has been engineered and built to the highest
standards to provide you with years of listening pleasure.

The DF-series servo-controlled subwoofers represent a break-
through in car audio technology. By designing the speaker and
proprietary control circuitry from the ground up, we have reduced
distortion to an order of magnitude below that of the best speakers
currently available. After you listen, we think you'll agree. For the
lowest distortion speakers around, there is only one choice. Velo-
dyne, the bottom line in bass.

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Warranty & Service Information

This product is constructed of the highest grade materials and
assembled under the strictest possible quality assurance condi-
tions.

Should a situation arise which leads you to believe the product is
malfunctioning, please return to your authorized Velodyne dealer
first.

Should the product require repair or service, your Velodyne dealer
is required to send the product in to Velodyne directly, we do not
authorize outside service stations to make repairs to this product.

If you have any additional questions concerning the specific war-
ranty coverage, please consult the supplied warranty & registration
card.

Any additional questions which are not covered in this manual
should be directed to either your authorized Velodyne dealer or
contact us directly  at Velodyne . . .

Velodyne Acoustics, Inc.

1070 Commercial St. Suite #101

San Jose, CA 95112

408.436.7270 voice

408.436.7276 fax

Summary of Contents for DF-10sc

Page 1: ...ot the magnitude of this small California company s achievement up there with Dolby noise reduction and the Compact Disc David L Clark Audio Nov 1990 on Velodyne s servo controlled subwoofer systems The servo feedback subwoofers in our experience produce the purest low frequency sounds of all the designs John E Johnson Jr Ph D Secrets of Home Theater and High Fidelity Jan 1995 on Velodyne s servo ...

Page 2: ...ould be set by installer after initial power up Installation manual MUST be followed precisely during installation process to ensure proper performance and prevent damage to speaker or control unit 1 10 SPECIFICATIONS DF 12sc DF 10sc THD 1 1 THD 10 25 10 25 frequency response 13 105hz 15 105hz sensitivity 1w 1m 90 dB 87 dB excursion capability linear 3 4 in 3 4 in max 1 1 4 in 1 1 4 in voice coil ...

Page 3: ...stening pleasure The DF series servo controlled subwoofers represent a break through in car audio technology By designing the speaker and proprietary control circuitry from the ground up we have reduced distortion to an order of magnitude below that of the best speakers currently available After you listen we think you ll agree For the lowest distortion speakers around there is only one choice Vel...

Page 4: ...m uses a motional feed back loop which corrects for any distortion Here s how it works The music signal that normally goes to your amp is re routed to our control unit This unit monitors the music signal which should be reproduced exactly without distortion We then mount two acceler ometers on the speaker One accelerometer monitors cone motion while the other accounts for motion of the vehicle Now...

Page 5: ...e incapable of error to the amplifier Forcing the speaker s acoustical output into a true representation of the music The term servo is misused by some manufacturers who use a different motor on their speakers to try and make woofers sound like larger more powerful units Unfortunately this usually results in a large amount of distortion as well At Velodyne we take an already large powerful speaker...

Page 6: ...g woofer with a minimum of 100 watts RMS Maximum suggested amplifier power is 300 watts RMS When installed in a sealed enclosure the unit may require an amplifier towards the high end of the scale 200 300w when used in an infinite baffle setup power requirements are reduced and satisfactory performance may be attained with a smaller amp 100 200w Sealed enclosures accurate sound simple to build but...

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