Question about Velodyne Audio Players & Recorders

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I have a Velodyne ULD 18; servo-mechanism circuit is in oscillation as if there is a leak behind the woofer but there is not

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Posted on Jan 02, 2017

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  • 124 Answers

SOURCE: woofer,s outer ring is ripped.

To fix this problem, you will need to contact Velodyne.
They may be able to replace the surround or recone this driver.

Because this system has the "servo" control, you need to have the accelerometer conected to the amplifier. With out it, the amplifier will not operate.

Posted on Jan 04, 2009

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  • 124 Answers

SOURCE: Velodyne ULD-12 driver voice coil sensor availability

Contact Velodyne. That is the only source for this part.

Posted on Jan 04, 2009

  • 124 Answers

SOURCE: No sound for Velodyne ct-100 sub woofer

Sounds like a dead amp. You could check the xformer output and the amp IC's with a VOM.

These amps do not cost a lot, about $40.00. and are easy to replace.

Contact Velodyne

Posted on Mar 26, 2009

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1 Answer

My sub woofer making noise like machine gun w out connect toamp


Disconnect the sub-woofer and see if the noise stops, if so the amplifier is OSCILLATING and so produces the noise.This can be related to fault with the pre-amp or audio processing section. Try and heat up the circuit using a hair dryer and if the fault clears then there are faulty electronic capacitors. If leak is seen then the pcb must be washed after the capacitor is replaced which can solve the issue.

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I have velodyne hgs15bg powered sub.. After a prolonged hard run, it developed a rattle at mid to higher volumes. what went wrong ??


You possibly ripped the woofer cone or welded the voice coil - something mechanical. There's only one thing in there that moves on purpose.

Mar 03, 2011 | Velodyne HGS-15 Subwoofer

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Velodyne sub woofer: Series S Model: VA08BVX10


The volume control pot can be replaced.

Any good quality audio shop or electronics repair shop should be able to fix this.


Nov 17, 2009 | Velodyne SPL-1000 Subwoofer

1 Answer

I just bought a used Velodyne hps 18 subwoofer. I am hearing popping sounds even at idle. What might be causing it?


This is related to the "servo control" circuit.

For repair you will need to contact Velodyne.

Nov 16, 2009 | Velodyne HGS-18 Speaker

1 Answer

Need schematic for velodyne 5 pin din servo amp


Only available from Velodyne.

velodyne at www velodyne com

Nov 16, 2009 | Audio Players & Recorders

1 Answer

My velodyne subwoofer is making "clicking" sounds and is not producing normal sound (e.g. music). What may be the problem?


You did not state what model this is.

If it is a servo controled unit, you may have a problem in the control circuit.

The models that use the servo control stystems should only be serviced by Velodyne or one of the listed service centers.

Velodyne is the only source for parts for these units.

Oct 01, 2009 | Velodyne Audio Players & Recorders

1 Answer

Speaker would push out and stay out with a hum when turned on.


Sounds like the "servo" on this unit has gone bad.

You will need to contact Velodyne for service on this.
It is the only place to get parts and service for this unit.

Apr 01, 2009 | Velodyne SPL-1000 Subwoofer

1 Answer

No sound for Velodyne ct-100 sub woofer


Sounds like a dead amp. You could check the xformer output and the amp IC's with a VOM.

These amps do not cost a lot, about $40.00. and are easy to replace.

Contact Velodyne

Feb 25, 2009 | Velodyne CT-100 Speaker

1 Answer

Woofer,s outer ring is ripped.


To fix this problem, you will need to contact Velodyne.
They may be able to replace the surround or recone this driver.

Because this system has the "servo" control, you need to have the accelerometer conected to the amplifier. With out it, the amplifier will not operate.

Jan 03, 2009 | Velodyne VRP-1200 Subwoofer

1 Answer

Velodyne ULD-12 driver voice coil sensor availability


Contact Velodyne. That is the only source for this part.

Oct 05, 2008 | Velodyne DD-18 Subwoofer

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