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Thread: Audio differential Signals

  1. #1

    Audio differential Signals

    1 have a differential audio signal of 15Vpp and i need to attenuate it to 5Vpp. I need help

  2. #2
    Addicted to Best! audio.bill's Avatar
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    I believe what you're asking for is referred to as an H-Pad attenuator which is for a balanced signal. A schematic of the resistors required for implementation as well as a calculator for R values is available here for reference. Further details on passive attenuation including an explanation of the H-Pad can be found here, including decibel attenuation and its relationship to voltages. Hope this helps!
    Last edited by audio.bill; 11-09-2017 at 10:47 AM.

  3. #3
    VIP/Donor [VIP/Donor] microstrip's Avatar
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    Quote Originally Posted by its_abdullah View Post
    1 have a differential audio signal of 15Vpp and i need to attenuate it to 5Vpp. I need help
    Unless you give us the details about the output and input impedance of the devices being considered it is not easy to advise you.
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    Addicted to Best! audio.bill's Avatar
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    Quote Originally Posted by microstrip View Post
    Unless you give us the details about the output and input impedance of the devices being considered it is not easy to advise you.
    Agreed, and that's why I couldn't get any more specific than providing the links which I did.

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    If it's uses an XLR cable and you don need an exact ratio you could just use a 10dB pad.
    https://www.parts-express.com/in-lin...-10db--240-412
    Kevin

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    [WBF Founding Member] audioguy's Avatar
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    Quote Originally Posted by Speedskater View Post
    If it's uses an XLR cable and you don need an exact ratio you could just use a 10dB pad.
    https://www.parts-express.com/in-lin...-10db--240-412
    I have used these in the past. And just an FYI, they are NOT exactly 10db, but less. Same holds for a 15db or 20db attenuators.

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