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Buzzing issue with new sound system

Dj GJM -  
 jean-paul -
Hello,

I just bought an Ibiza AMP-600 amplifier and 2 Power Acoustic speakers of 250W each, but I have a small problem. When I connect my MIDI table to it, I hear a very unpleasant buzzing noise that is quite noticeable. When I connect an iPod or another MP3 player, I no longer hear this buzzing, and when I connect my laptop directly to the amplifier, I hear the same buzzing. Where could this buzzing be coming from? 
Configuration: Windows 7 / Firefox 3.5.8

2 answers

  1. jean-paul
     
    I have the same problem
    after several attempts, I found a solution
    the interference comes from the PC's power supply - there are no issues when the computer is running on internal batteries
    all the interference comes through the ground socket
    there are several possible solutions
    1- do not use any ground socket --- not highly recommended
    2- isolate the ground only on the PC and its peripherals
    a - either by using an extension cord without ground directly
    b - or by supplying the computer part through an isolation transformer
    c - it is also possible that the interference may disappear by putting filters on the ground sockets of the devices -- I have not tested this solution yet
    1
  2. Tony
     
    Hello,
    I have exactly the same problem with the same amplifier, Ibiza AMP600, and after several attempts (changing cables, different speakers, testing on other amplifiers, either directly or through different mixing tables, different sources), it turns out that the issue is that the Ibiza AMP600 struggles with what comes from the laptop source. I specifically mention laptop because it works with a desktop PC. I would be interested to know if there is any solution to resolve this problem.
    I will tinker with filters while waiting for a response, and I will not hesitate to get back to you if I find a solution.
    Thank you in advance.
    0