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Hissing speakers when something plugged into FireWire ports

Discussion in 'Converters / Interfaces' started by Myth, Nov 30, 2005.

  1. Myth

    Myth Guest

    I have a pair of Event TR-8s that are connected to my Powerbook G4 and they emit a very audible hiss (like exagerated tape hiss) when I have something connected to my Powerbook's FireWire ports. As soon as I disconnect the FireWire cable it goes away.

    I have an external FireWire HD that hosts some of my sample and audio libraries and need to have connected while I work.

    Speakers are connected to computer's 1/8" audio/headphone jack via a 1/8" mini to RCA "Y" cable.

    Does anyone know what's going on? Any suggestions and pointers would help. Thanks!
  2. Calgary

    Calgary Active Member

    Hi, I can't speak to the cause but if you run balanced cables you probably won't get the buzz. Although you might need a different soundcard to do that. I drive my TR-8s out of an afforable Emu 1212m and they sound very respectable.

    The only other thing I can think of is that you might have your trim pots cranked. Try setting them to 12 o'clock and see if that helps. :)
  3. Myth

    Myth Guest

    I keep the trim pots at about 1 o' clock.

    I was suspecting it could be the unbalanced cables. I am thinking of buying a Focusrite Saffire but that'll probably be until after the new year.

    Anyone else know what could be going on?
  4. Calgary

    Calgary Active Member

    Don't get me wrong, you can run the TR8s with unbalanced cables without hiss. This is something to do with the audio bus in your soundcard/compie. FWIW down the road, the saffire will definitely fix that.
  5. Myth

    Myth Guest

    That stinks cause I thought Apple's internal soundcards were supposed to be top tier. Maybe it's a Powerbook thing. I wonder if this would happen on a desktop system.
  6. Calgary

    Calgary Active Member

    Depends. The native PCI bus on some motherboards can be dirty but often they are OK-ish. It definitely won't happen if the desktop has basic decent soundcard. :cool:

    I'm anti-Apple so I can't say one way or another what the deal is there. Could be something simple, try another cable first.

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