Closed Thread
Page 1 of 2 1 2 LastLast
Results 1 to 15 of 21

Reload Thread: Feedback from computer?

  1. #1
    brandontw's Avatar
    brandontw is offline just some guy



    Join Date
    Feb 2004
    Location
    Reno, NV
    Age
    28
    Posts
    3,108
    Post Thanks / Like
    Images
    5
    Mentioned
    0 Post(s)

    Feedback from computer?

    When i have my compy connected to my receiver, there seems to be feedback or something. If i leave no music playing, and turn up the receiver there is a low buzzing/humm noise. This has happened with all of my computers, and I wonder if there is any way to fix it?

    it also happens with my digital cable box...

    But if i unplug the Rca's connecting the components to the receiver, it quits.








  2. #2
    jj4475's Avatar
    jj4475 is offline CarAudio.com Elite



    Join Date
    Apr 2006
    Location
    ill
    Posts
    1,723
    Post Thanks / Like
    Images
    6
    Mentioned
    0 Post(s)

    Re: Feedback from computer?

    mine dont do it till about half way volume




  3. #3
    brandontw's Avatar
    brandontw is offline just some guy

    Threadstarter


    Join Date
    Feb 2004
    Location
    Reno, NV
    Age
    28
    Posts
    3,108
    Post Thanks / Like
    Images
    5
    Mentioned
    0 Post(s)

    Re: Feedback from computer?

    mine too, but my DVD movies play quietly for some reason





  4. #4
    traksta15's Avatar
    traksta15 is offline I love lamp.



    Join Date
    Dec 2003
    Location
    Mcalester, Ok
    Age
    27
    Posts
    4,065
    Post Thanks / Like
    Images
    11
    Mentioned
    0 Post(s)

    Re: Feedback from computer?

    mine does it too.....wonder why?



    Kenwood ddx712
    boston acoustics z6
    arc audio 300.4
    40 sq ft damplifier

  5. #5
    IamDeMan's Avatar
    IamDeMan is offline Banned



    Join Date
    Nov 2004
    Location
    /dev/null
    Age
    39
    Posts
    22,268
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Feedback from computer?

    First hing to do is make sure both the source(PC or outboard soundcard) are connected to the same power plug as the amplifier. This isolates the chance that the hum is coming from some weird ground loop issue. I have found this problem to mostly be with onboard or PCI sound cards. I use an extigy USB sound card with my HTPC and connect it via optical cable to my receivr and get ZERO introduced noise.




  6. #6
    joetama's Avatar
    joetama is offline The British Ear



    Join Date
    Nov 2005
    Location
    Cincinnati, Ohio
    Age
    28
    Posts
    15,306
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Feedback from computer?

    The problem is noise from the computer is leaking down the audio cable it's a pre amp to ground noise issue.... What you need to do is to get some sort of isolator or "Direct" box which isolates the input from ground.....







  7. #7
    brandontw's Avatar
    brandontw is offline just some guy

    Threadstarter


    Join Date
    Feb 2004
    Location
    Reno, NV
    Age
    28
    Posts
    3,108
    Post Thanks / Like
    Images
    5
    Mentioned
    0 Post(s)

    Re: Feedback from computer?

    Quote Originally Posted by B&W_EE View Post
    The problem is noise from the computer is leaking down the audio cable it's a pre amp to ground noise issue.... What you need to do is to get some sort of isolator or "Direct" box which isolates the input from ground.....
    any link... ideas?
    any way to do it cheaply?





  8. #8
    joetama's Avatar
    joetama is offline The British Ear



    Join Date
    Nov 2005
    Location
    Cincinnati, Ohio
    Age
    28
    Posts
    15,306
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Feedback from computer?

    This is the direct box that we use, very very handy little piece of equipment. You could also look on partys express for any type of "isolation" transformer box or something like that....

    Link AS REQUESTED!!!!
    http://www.northernsound.net/Sales/d...horizondi.html

    The trick I use on my laptop is I unplug it from the AC source, but IF you have a desktop this wont work unless your computer is magic lol....







  9. #9
    IamDeMan's Avatar
    IamDeMan is offline Banned



    Join Date
    Nov 2004
    Location
    /dev/null
    Age
    39
    Posts
    22,268
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Feedback from computer?

    Quote Originally Posted by B&W_EE View Post
    This is the direct box that we use, very very handy little piece of equipment. You could also look on partys express for any type of "isolation" transformer box or something like that....

    Link AS REQUESTED!!!!
    http://www.northernsound.net/Sales/d...horizondi.html

    The trick I use on my laptop is I unplug it from the AC source, but IF you have a desktop this wont work unless your computer is magic lol....
    This fully explains why my USB Sound card introduce no noise. I find it to be the best choice honestly. It's something that can easily be added to any system/laptop I may own or want to use. The etigy I use has a **** load of options, inputs and outputs as well. I love it.




  10. #10
    JimJ's Avatar
    JimJ is offline Tangled Up in Blue



    Join Date
    Jun 2004
    Location
    Hillsborough, NC
    Posts
    31,680
    Post Thanks / Like
    Mentioned
    1 Post(s)

    Re: Feedback from computer?

    This isolates the chance that the hum is coming from some weird ground loop issue.
    I've gotten plenty of 60Hz hum when everything is plugged into the same surge protector




  11. #11
    joetama's Avatar
    joetama is offline The British Ear



    Join Date
    Nov 2005
    Location
    Cincinnati, Ohio
    Age
    28
    Posts
    15,306
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Feedback from computer?

    Surge Protectors are bad for ground noise because part of what they do is directly connect all the grounds together behiend the "real" ground so the noise has no where to go except loop around back into your device.







  12. #12
    IamDeMan's Avatar
    IamDeMan is offline Banned



    Join Date
    Nov 2004
    Location
    /dev/null
    Age
    39
    Posts
    22,268
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Feedback from computer?

    Quote Originally Posted by JimJ View Post
    I've gotten plenty of 60Hz hum when everything is plugged into the same surge protector
    Well nothing is full proof obviously

    I've heard that usually alleviates those AC hums.




  13. #13
    btnhfan's Avatar
    btnhfan is offline Hail to the King Baby!!!!



    Join Date
    Jan 2004
    Location
    CT/ GA Tech, Atlanta
    Age
    26
    Posts
    7,067
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Feedback from computer?

    How is the receiver connected to the pc?

    I switched over from rca to optical.



    No noise.



    Best receiver ever?
    I think so

  14. #14
    brandontw's Avatar
    brandontw is offline just some guy

    Threadstarter


    Join Date
    Feb 2004
    Location
    Reno, NV
    Age
    28
    Posts
    3,108
    Post Thanks / Like
    Images
    5
    Mentioned
    0 Post(s)

    Re: Feedback from computer?

    Quote Originally Posted by btnhfan View Post
    How is the receiver connected to the pc?

    I switched over from rca to optical.



    No noise.
    yeah my reciever doesnt have optical...i need a new reciever





  15. #15
    brandontw's Avatar
    brandontw is offline just some guy

    Threadstarter


    Join Date
    Feb 2004
    Location
    Reno, NV
    Age
    28
    Posts
    3,108
    Post Thanks / Like
    Images
    5
    Mentioned
    0 Post(s)

    Re: Feedback from computer?






Closed Thread
Page 1 of 2 1 2 LastLast

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may post attachments
  • You may edit your posts

1e2 Forum