Question about Altec Lansing Multimedia Computer Speakers

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Static coming from speakers

I have an older Altec lansing speaker set. An ACS 45. It has worked fine for years. I got rid of the computer and now use the speakers to play music from my MP3 player. They now have a static noise coming from them every so often, even when not connected to a sound source. Is there something I can do with placement of the speakers. Is it interference from surrounding devices?

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  • Bruce Adamson
    Bruce Adamson Mar 31, 2014

    I am a DJ, so I know about the connection issue. I can make the sytem hum if I touch the input cable. This is a random static noise, like a a drum stick on a table. It does it with or with the MP3 player connected. The speakers are now in an area with flourescent lights. I know they can cause issues. There is no on/off button to mess with. If i unplg the speaker power and plug them back in, it helps for a little while.

  • Bruce Adamson
    Bruce Adamson Mar 31, 2014

    A better description of the noise may be it sounds like someone passing gas.

  • Gavin McCloy
    Gavin McCloy Apr 01, 2014

    Can you tell me the exact model of the speakers please? Have you tried another PSU? also if you can open the unit (obviously switched off for a while before you open) do all components look healthy enough? check any capacitors the top of each capacitor should be shiny with no signs of oxidation, look for dry joints, also tap the speakers when on to see if the noise is appearing when you do so. also does it do this when connected to a laptop or pc etc or is it only the MP3? does it sound like a drumstick hitting a table or does it sound like someone passing gas (or both?) :)

  • Gavin McCloy
    Gavin McCloy Apr 01, 2014

    EMI can be a cause of a bad earthing system with your equipment too and can cause all other sorts of devices, I myself own a studio with multiple devices attached to one another, I still suffer from EMI because of neighbours using powerline ethernet adaptors, I'm also using filters but does not help that much. checkout what EMI sounds like on YouTube

  • Bruce Adamson
    Bruce Adamson Apr 01, 2014

    Altec lansing Multimedia ACS-45 is all I can find. I unplugged the input lead and got the same noise. Now I have just the sub-woofer plugged in to power. The noise is more like someone passing gas. I am going to take the subwoofer apart and see if anything looks awry.

  • Bruce Adamson
    Bruce Adamson Apr 03, 2014

    Problem seems to have gone away...Been runing them at my desk for a couple days with no problems. Left the sub plugged in but had speakers disconnected. Hooked everything back up and it's fine. Weird thing is I had reconnected the speakers multiple times before.


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Not much information here but I will try my best, could be a problem with the cable your using between the speakers and the mp3 player, you could have a dry joint, if it's like a "hum" sound your getting it's a bad ground, without the mp3 playing plugged in tap the end of the stereo minijack cable with the speakers turned up? hear the 50hz buzz - if the interference sounds the same it's most likely a bad cable or bad connector on the speakers. I would need to either hear the interference to determine what fault it is or if you can describe it better i.e. what it sounds like.

Posted on Mar 31, 2014

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SOURCE: My Altec Lansing

Hi, I would suggest that you should check into your computer rather than your speakers. Specifically your sound card and its drivers. Try going to your Device Manager and check your Sound, Video and Game Controllers. There should not be any Yellow markings anywhere. Cheers

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check u have the lastest sound driver.or u can try uninstalling it and run driver cleaner then try reinstalling driver.if u are using vista u may have to go to audio devices and set from there.also try air the input plug whole just incase dust has settle there. hope this helps.

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Sounds like a problem in the speakers' internal power supply, maybe a faulty capacitor. Speakers need to be looked at by a technician, or replaced with a new set.

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