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Velodyne sub noise

Making loud rumbling noise even when is not connected to my system just plugged into the the wall ac. Velodyne sub va1215xII

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Sounds like a bad amplifier.

One of the input caps on the power side is my guess

best bet is to contact Velodyne for a repair or replacment

Posted on Jan 04, 2009

  • Toby Foster
    Toby Foster Dec 12, 2013

    try putting a 'grounded' 2 prong adaptor at the end of the plug and using that to plug into the wall socket

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Speaker making a rattling noise I have a cht-15 velodyne sub


send your plate amplifier in for repair to velodyne or to ebcelectronics

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I have 2 velodyne fsr 12 subs. both were taken out by PG&E power surges. One make a white noise that cuts in and out, but will still play bass when fed a signal, the other makes a loud static sound...


Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Velodyne-FSR-12-Subwoofers-manual/id/866ag600/t/2/

Not that it would help.

Is the white noise present in the absence of an input connection, free-floating?

The amps in both of them sound like they

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Making loud humming noise only.but if you plug


If I understand this correctly: with NO input or cable attached it hums; with an RCA cable attached it works. (What does 'some' mean in this regard?)

You say that connecting the RCA cable improves its sound. That tells me you're supplying a ground through the RCA cable for stray voltage in the sub.

It seems there may be a basic power issue if it hums with no input. Sometimes a given power source in a home may be wired differently than others or may insufficient grounding, which can result in hum. Try reversing the sub's power plug or move it somewhere else.

Since the sub contains its own electronics it is also susceptible to strong external magnetic fields. Keep it and any signal cables leading to it some distance away from other electrical devices like TV's.

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I just bought mine yesterday and have the same problem... did you find a solution (other than throwing it out the window)?

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Amplifier for my velodyne cht-8 is making noises



Yes the amp section can be peplaced.

Call Velodyne, the amps are not that expensive.

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Emits a loud hum or rumble sound.


This problem is usually because of grounding.

If you look at the power lead, you will notice it is the regular "kettle plug" shape, but it only has two pins (live and neutral). There is no earth connector.

You have to ground the sub to your receiver. This is done by running a RCA connector connected to one of the unused connections to the amp.

However, this doesnt ALWAYS solve your problem. As in my case. I have a Pioneer 7.1 receiver, which is ALSO not grounded. so running a spare RCA cable has no effect. What I have done is wired a RCA connecter to a copper cable and connected the other end to the Earth pin on a 3 prong plug. This is plugged in to a wall socket, thus grounding the sub.

It's not a solution the manufacturer will suggest, but it seems to work for me.

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I regret to inform you that it sounds like the velodyne's internal amp has a problem and will likely require servicing.

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Major buzz/Humming sound coming from my subwoofer


Well there are only a few reasons i can think of that just might be the reason behind said buzzing.

1. It may be connected to another power source ( amplified or powered supply ) or incorrectly connected. It may also be too close to said power supply.Try letting the dog (sub) out on his leash a little Drag out the manual that came with the sub, and check the correct procedure for your type of setup.
**People do read manuals still don't they ?**

2.The only other problem i have heard of is port noise in low registers. Keep the the port area clean, as it may suck up dirt, or even worse, small children!

3. However, if you're considering placing this subwoofer in a cabinet, I'd recommend allowing ample breathing room for the heat sink. This can also be done by drilling smaller holes in the cabinet ( 8-12 mm holes - with the owners permission of course) but please do remember to keep the port area clean.

4. The product ie: Velodyne DPS-12 Subwoofer, came with a bad power supply, presuming it is new, check your warranty.
(not very likely - see also scenarios 1, 2 or 3.)

Velodyne has been making subs forever and do it well.


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