Page 2 of 3 FirstFirst 123 LastLast
Results 11 to 20 of 28

Thread: Nasty, Nasty PC Audio

  1. #11
    Newbie akwash79's Avatar
    Join Date
    Jan 2007
    Posts
    39
    Quote Originally Posted by symon_say View Post
    so try the options you post those solve the problem in most case or try to put as far as you cant you carpc and your amp.

    Many people here advise to ground the pc and the amp at the same spot. By doing this, is there a possibility of them trying to ground through each other? Just a thought.

    As far as my RCAs, they are better than wal-mart quality but not quite Monster cables. Also there are 2 different brands going to front and rear and they both produce the noise.
    [HL]Warning - NSFW [/HL]

  2. #12
    Neither darque nor pervert DarquePervert's Avatar
    Join Date
    Apr 2004
    Location
    Elsewhere
    Posts
    13,949
    Quote Originally Posted by symon_say View Post
    It really doesnt matter if you put your power cable and your RCA together, the loop that the power cable creates is nothing to care about is you install your equipment propertly. Is more important to have good quality RCA than this.
    I don't believe that anyone said having signal cables running alongside power cables created a ground loop.
    The power cables put out electro-magnetic interference that can affect the signal, causing noise in the audio and distorted images on the video. EMI is something that is ut out by every electrical cable whether it's long or short, AC or DC, a few milliamps or hundreds of amps. It's still there to some degree.

    I'm don't going to argue your experience or skills, but the general consensus is that power cables and signal cables should be seperated. That' not just by this crowd, but also by the high-end car audio crowd.

    Quote Originally Posted by akwash79 View Post
    Many people here advise to ground the pc and the amp at the same spot. By doing this, is there a possibility of them trying to ground through each other? Just a thought.
    No. Electricity flows in a circle. In throught he power and out through the ground, basically. It's kinda like a NASCAR race: It only goes one way unless there's a problem.
    Have you looked in the FAQ yet?
    How about the Wiki?



    Under normal circumstances, a signature would go here.

  3. #13
    Newbie
    Join Date
    Mar 2007
    Posts
    50
    Try turning your gains down on you amps. Another option is a line driver as close to the PC as possable. The line driver will provide a cleaner output with a higher voltage and reject any signal noise you may be having.
    David

  4. #14
    Newbie
    Join Date
    May 2006
    Location
    MA
    Posts
    42
    is the outside part of the usb cable the ground? if so i would add a ground from it to the main ground for the amp. i have a tendency to believe the pc has a lot of resistance between where the power and ground come in and the signal goes out.

  5. #15
    FLAC greatwhite's Avatar
    Join Date
    May 2007
    Location
    Top o' the world Ma!
    Posts
    1,282
    I've had everything form alt whine to pc noise to static from nowhere.

    All I can tell you is to move things around, and try grounding things in different orders/places.

    I eventually cured my issues with carfeul cable routing (audio and power), by putting my comp in an all metal case and grounding it to the vehicle (well, it's bolted to the body structure). My amps are mounted on mdf and go to a common ground with equal length cable runs.

    I am even running an inverter right now and have no noise! (too poor right now for a DC-DC solution ) Once again, careful positioning, routing and grounding makes it viable.

    It just seems you have to experiment to find the right combo for your setup and vehicle.

    Good luck

  6. #16
    Newbie akwash79's Avatar
    Join Date
    Jan 2007
    Posts
    39
    Well, I moved the amp ground to a separate location and it seemed to sound a little crisper but the noises still persist.

    I also hooked my laptop up to the amp and there was no noise whatsoever. Nothing but clean, crisp sound. As soon as I hook the pc up to the amp buzz...buzz...whine...buzz....buzz. This happens with using both the onboard sound and the turtle beach roadie. Arrrggggg.....

    If tested independently, neither of the devices are producing noise. It only seems to happen when both are connected together.
    [HL]Warning - NSFW [/HL]

  7. #17
    FLAC greatwhite's Avatar
    Join Date
    May 2007
    Location
    Top o' the world Ma!
    Posts
    1,282
    Try it with the car running, the car off , the pc plugged into wall power (if you still can). See if it's alt noise, fan noise, hdd noise.....

    Cheap amps and cables can sometimes cause problems. And on the other end, high end amps can pick up sounds (noise) in a poor install that a cheap amp doesn't.

    Ya gotta find where it's comming from before you can fix it.

    Unfortunately, there's usually no easy way to find it. You just have to keep changing things until you find the source. It can be very frustrating and a long process. You just have to keep pluggin' away. I wish there was a definative answer or easy fix to give you, but there isn't. Sorry.

    Good luck

    P.S. maybe you should remove that 100% completed line in your sig J/K.

  8. #18
    _
    Join Date
    Mar 2004
    Location
    Little Elm, Texas
    Posts
    13,500
    Did you check your gains on the amps and make sure that they are set up properly?
    Jan Bennett
    FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

    Please post on the forums! Chances are, someone else has or will have the same questions as you!

  9. #19
    Car Audio Moderator durwood's Avatar
    Join Date
    Sep 2006
    Location
    Chicagoland (St. Charles,IL)
    Posts
    2,028
    Sounds like maybe you have an issue where both your amp and computer and grounding the ground portion of the RCA cable. Try a ground loop isolator at this point. I am alomst 99% certain it will fix your rproblem and they are cheap <$10.

    I could suggest some other things to do, but at this point I don't know if you want to do some surgery on your RCA cables or swap out your amp for a different brand.

  10. #20
    Newbie akwash79's Avatar
    Join Date
    Jan 2007
    Posts
    39
    I adjusted the gains and that doesn't seem to be an issue. Thanks for the suggestion though. I think durwood may be correct on this issue and I may have to go with the GLI. They pc and amp only cause a problem when used with each other.

    @greatwhite - well technically it is 100%, I just have to turn the volume up a litte and the noise isn't a problem lol. Sucks when changing tracks
    [HL]Warning - NSFW [/HL]

Page 2 of 3 FirstFirst 123 LastLast

Similar Threads

  1. OEM Navigation Connectors
    By Mr Castulucci in forum General Hardware Discussion
    Replies: 15
    Last Post: 07-20-2010, 05:25 PM
  2. How2 control CarPC from key fob....
    By NotchbackVW in forum Power Supplies
    Replies: 1
    Last Post: 09-21-2007, 05:27 PM
  3. Audio problems, Epia Sound, and FAQ stuff
    By gothate in forum Newbie
    Replies: 2
    Last Post: 06-16-2005, 04:04 PM
  4. Replies: 19
    Last Post: 12-04-2004, 05:37 PM
  5. Car PC Audio Design
    By sza in forum Car Audio
    Replies: 4
    Last Post: 10-27-2004, 09:08 AM

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
  •