Question about Velodyne DLS-3750 Subwoofer

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Subwoofer inop i had a problem with a cicuit in the house that was arcing in the electrical turning the power off and on to my entertainment system. Since then my subwoofer has been inoperative. It will not turn on with the amp any longer and no sound. I found the remote and the blue power indicator light comes on but will not remain on and no sound. I disconnect or disconnect the input from the amp and it has a loud buzz or hum only.

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The blue power light merely indicates that house power is getting to the sub. My guess is that the internal power supply reacted poorly to the on-again-off-again power application and something failed

Posted on May 04, 2013


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Posted on Jan 02, 2017

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SOURCE: 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.

Posted on Jan 17, 2008

  • 124 Answers

SOURCE: loud hum when HGS 10 is turned on

Bad amp

Contact Velodyne

Posted on Dec 20, 2009

  • 124 Answers

SOURCE: I have connected the subwoofer to the pre-amp out

One of two things may be going on.

The amp has a fuse mounted on the PC board. The fuse may be blown.

The speaker may be bad. that may have blown the fuse.

You can test the speaker with a "D" battery.
Take the amp section out of the back, disconnect the speaker leads.
Touch the speaker leads to the poles of the battery. it should make a little thump and the cone should move freely.

Contact Velodyne for service.

Posted on Dec 30, 2009

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After finally finding the circuit diagram for the Wharfedale SW-150 sub woofer, I've managed to identify and fix a fault which has the same symptoms as yours.

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