Question about Pioneer DJM-600 Silver Professional DJ Mixer with Auto Beat Cou Home Equalizer

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Feedback noise from mixer

I have a pioneer djm-600 and I'm getting feedback noise from it when Iattempt to record. I've tried both stereo and phono outputs and thesame noise occurs. I have a aluminum plated copper wire i'm trying toground it with, but I dont have anything/know what to ground it to? andI dont know if that will solve the problem but I've asked some of myfriends and they seem to think that's it

Posted by cpomeroy18 on

  • cpomeroy18 Dec 19, 2008

    I'm recording onto a laptop, and i figured out that when i unplug the power cord to the computer, the buzz/humm noise totally goes away. But my battery is shot and I only get like 15 or so minutes of use out of it on a full charge... so besides getting a new battery, and thoughts on what i can do? thanks!



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Your mixer is already grounded, and does not need any additional grounding. It is grounded through the Power Cord.

Now, the feedback might be coming from one of the units you have connected to the mixer. The issue could also be the cable you are connecting to your recorder. Are you recording to a computer, or to some other external recorder (CDR / DVR / MDR, etc?) - try a different cable. Also try the different outputs on the mixer - you have 2 balanced line outputs you can record directly from. Don't use the RECORD OUT line, it's an unbalanced line, and if you want a good quality signal to record, your best bet is to use the XLR outputs. However, that might be connected to your amp or something.

What do you have going to the unit? Disconnect everything, and try by connecting each item 1 by 1, to eliminate where this feedback is coming from. Also, check for any ground loops that you might have, if you have a lot of equipment hooked up in your set up. (Educate yourself on Ground Loops)

If all else fails, get yourself a HUM ELIMINATOR.

DJ Equipment Repair & Service
A DJ Pro Audio Co.

Posted on Dec 18, 2008

  • Anonymous Dec 19, 2008

    Power cords are always a source of ground issues when they have alot of current running through it, are not properly shielded (like generic power cords), or if your running your power cords right next to your audio lines. Try and keep them separated, or shielded from each other.

    I would suggest replacing your power supply, with an original developed for your computer. If it is no longer made, then I would suggest getting a high quality power supply.

    FYI, the transformer on laptop power supplies (the big black box on the line), emits some powerful signals, because this is where the power is transformed from your laptop and converted to be connected to the wall. Otherwise, it would damage your laptop. This transformer, is usually inside on regular PC's, but because of it's size, it would require a large housing on the laptop... not making it as portable or compact as one would like.

    A HUM ELIMINATOR will also help with minimizing any ground issues on the line. Hope this helps.

    - OPTiC

    DJ Equipment Repair & Service

    A DJ Pro Audio Co.



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