Results 1 to 10 of 10

Thread: static/noise from speakers

  1. #1
    Low Bitrate
    Join Date
    Jul 2004
    Posts
    70

    static/noise from speakers

    i just installed the computer and there is static coming from the speakers. it's a really bad whine that gets louder according to the RPMs there's also this pulsing noise that come from the speakers. it's extremely loud. when i unplug the RCAs from the motherboard the noise goes away. and when i plug in my ipod to the RCAs, it plays music fine.

    i have an opus 120W psu powered by a 10 gauge power wire. the grounding point is the battery. and i am using an epia m10000. everything is inside the glove box.

    i tried searching and i see that most people suggest a ground loop isolator? i'm not sure what this is or what this does. do you guys know what my problem is or a way to diagnose the problem and to figure out a solution? thanks.

  2. #2
    Low Bitrate dune's Avatar
    Join Date
    Dec 2003
    Location
    Dallas, Texas
    Posts
    89
    Your computer power supply and the amplifier/head unit should have the same grounding point. Isolators will help but won't get at the root problem.
    tango/dune
    Infiniti QX4 2002 project (done!... for now)

  3. #3
    Low Bitrate
    Join Date
    Jul 2004
    Posts
    70
    Quote Originally Posted by dune
    Your computer power supply and the amplifier/head unit should have the same grounding point. Isolators will help but won't get at the root problem.
    hm..i'm using the stock amplifier in my car that's under the passenger seat, so i think it'll be too hard to ground my stock amplifier

  4. #4
    FLAC
    Join Date
    Sep 2004
    Location
    Falls Church, VA
    Posts
    904
    That could be why. The stock amp may require a certain impedence that your head unit does not provide

  5. #5
    Low Bitrate
    Join Date
    Jul 2004
    Posts
    70
    Quote Originally Posted by Will Albers
    That could be why. The stock amp may require a certain impedence that your head unit does not provide
    i don't have a headunit. and i'm pretty sure that's not the problem...

  6. #6
    FLAC
    Join Date
    Sep 2004
    Location
    Falls Church, VA
    Posts
    904
    replace head unit with source. All the same thing. The signal impedence may not match the factory amp

  7. #7
    Low Bitrate keyvan's Avatar
    Join Date
    Dec 2005
    Location
    Orange County, CA
    Posts
    68
    I have the same exact problem. A whine that goes with my RPM (my friend thought i installed a supercharger or turbo, lol), and just a crappy noise that kind of pulses for half second over and over.. I dont have an amp, i just have my aftermarket stereo hooked up and i am using the aux input port to hook it to my computer.

    if we can find a solution here that would be great..

  8. #8
    Variable Bitrate viper24's Avatar
    Join Date
    Oct 2005
    Location
    Sacramento, CA
    Posts
    368
    find out where the ground comming out of your deck(head unit) is, and connect that ground to the ground from your computers power supply. Then connect it all back to the chassis. Just make sure to mind your fuses and connect everything after the fuses. I hope that made sense.
    2005 Dodge Ram HEMI

    http://www.cardomain.com/ride/2239451

    15" LCD touchscreen
    Mac Mini
    6" Headrest monitors
    Modded Xbox

    5 PSone screens going in doors
    And another 15" LCD!

  9. #9
    Low Bitrate
    Join Date
    Jul 2004
    Posts
    70
    Quote Originally Posted by viper24
    find out where the ground comming out of your deck(head unit) is, and connect that ground to the ground from your computers power supply. Then connect it all back to the chassis. Just make sure to mind your fuses and connect everything after the fuses. I hope that made sense.
    i'm using a stock amp under the passenger seat. so you're saying i have to take out the seat and cut the ground wire that goes into my amp and ground it at the same point as my power supply? can i just run the ground to the battery? also is this the only solution? because i don't really want to ground my stock amp or cut it or anything. thanks

  10. #10
    Low Bitrate dune's Avatar
    Join Date
    Dec 2003
    Location
    Dallas, Texas
    Posts
    89
    Your stock amp is already grounded, likely to somewhere on the chassis and also the same point as your head unit. You need to find out where that point is and ground your computers' power supply at that location.
    tango/dune
    Infiniti QX4 2002 project (done!... for now)

Similar Threads

  1. Speakers setup and placement
    By kingtut in forum General Hardware Discussion
    Replies: 1
    Last Post: 08-13-2007, 02:37 PM
  2. soundcard + amp + factory speakers?
    By bmbr in forum Car Audio
    Replies: 8
    Last Post: 03-23-2006, 11:57 PM
  3. 92 range rover speakers cutting out
    By MAXXMODDER in forum Car Audio
    Replies: 1
    Last Post: 12-09-2005, 04:40 PM
  4. Rear speakers not going :(
    By samael in forum Car Audio
    Replies: 9
    Last Post: 08-13-2005, 02:33 AM
  5. Replies: 12
    Last Post: 10-28-2004, 06:44 PM

Bookmarks

Posting Permissions

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