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Thread: Questiong about noise filter

  1. #1
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    Post Questiong about noise filter

    Hello folks..

    I know
    getting rid of noise problems has been covered..

    but

    i searched forum and got a lot of answers from there. grounding my computer and power got rid of about 80% of noise. leftover noise is acceptable but a little bit annoying so i decided to use noise filter(ground loop isolator)..

    I searched ebay but there are some diff. amp of noise filter such as 30 amp, 18 amp, 10 amp, etc..

    which one should i use? can i use any of them?

    thank you very much
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  2. #2
    Maximum Bitrate smashr2k's Avatar
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    you need a $15 ground loop isolator from radio shack.
    Car: 1999 Dark Green Mustang GT Coupe
    Audio: Alpine HU, JL 6ch Amp, JL Stealthbox and XR series components.
    Player: Empeg for now; something custom later.
    www.neotechpc.com - Custom built laptops!

  3. #3
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    A ground loop isolator isnt a filter. its a transformer that keeps the grounds separated so that devices cannot share grounds which creates noise.

  4. #4
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    But this one shows ground loop isolation and has AMP

    http://cgi.ebay.com/aw-cgi/eBayISAPI...tem=1292889096

    check this out...
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  5. #5
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    um...can you do some research before you decide to make me look bad? 20 amps eh? i would hope you never have 20 amps going through your rcas. Its 2 transformers per rca line. one for the signal and one for the shield/ground

  6. #6
    Maximum Bitrate smashr2k's Avatar
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    that is the same thing i bought from radio shack....
    Car: 1999 Dark Green Mustang GT Coupe
    Audio: Alpine HU, JL 6ch Amp, JL Stealthbox and XR series components.
    Player: Empeg for now; something custom later.
    www.neotechpc.com - Custom built laptops!

  7. #7
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    Ok.. sorry for not clear question..

    so i can buy this one right? since it is same product at radio shack.
    if it is, probably i will buy this from this guy(ebay)... there is no shipping charge and no tax... good!
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  8. #8
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    helloman,

    a ground loop isolator and a power supply filter are two totally different things that are both used for a common goal: to get rid of the noise.
    The first one (the ground loop isolator) is connected between your aux audio source (soundcard's output in our case) and the headunit (or it's aux adapter). It stops those noise making currents that flow through your audio cables, just because the various parts of your setup (PC-Adapter-Headunit, etc) are grounded in different and distant points of your car's body. It usually has two sets of RCAs (L/R male and L/R female) and of course it's not rated at Amps because it doesn't have to carry any significant current.
    An in line noise supressor filter is connected between the positive pole of your battery and the electronics you want to supply (headunit, PC's power supply, etc). It's job is to get rid of the noise that is produced by the car's alternator and the rest of it's electric system. If you have a new car (or alternator), with solid state ignition, chances are that you don't need it because the noise it produces (the car) is minimal. These filters ARE rated and the one that you have to use depends on the current that the appliance you want to supply through it draws. If it's rated for higher amps- no problem. It is just bulkier and more expensive. For computer use, a 10Amp rated one - I think is OK (mine draws max 4Amps) and you 'll be on the safe side.


    Dimitris

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