Home GuitarPCB Forum General DIY Pedal Discussion balanced out (XLR)

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  • #19777
    Miah
    Participant

    If I were to want to put a balanced out on a build in addition to the regular output (thinking I could utilize that straight into my audio interface) how hard would that be to add into a circuit? could it just be something added between the output of the board and the output jack? I saw a post from Wilkie1 that mentioned it in reference to the Paramix, but I don’t know if the same would apply here as I’m not using the Paramix in this case. would anyone happen to have a schematic of how to do this?

    #19779
    Cybercow
    Moderator

    Miah – see this other forum thread . . . .

    Adding an XLR Output to a Guitar Pedal

    #19780
    Miah
    Participant

    Cybercow!, That is perfect! thank you!

    #19835
    wilkie1
    Moderator

    I sent Barry a prototype DI box with extra features including balanced XLR a couple of years ago.  He did not have many folks interested in it at that time.  I will be happy to help if anyone is interested.  Here is a photo of the one I made for Barry.

    #19836
    Cybercow
    Moderator

    Wilkie1 – that’s sweet!

    #19842
    Billy
    Moderator

    Tell us more Wilkie

    I particularly like the cab sim  addition

    But don’t have a clue with DI boxes in general I have had a few people asking about adding xlr etc

    #19844
    sofnwhat
    Participant

    I’m interested in this also and have collected a DI pcb and XLR jack and a dual buffer from another store.  Occasionally I plug into a friends PA just for home / acoustic fun.  parts are stacking up, better get to building.

    #19848
    wilkie1
    Moderator

    Here is some more info.  The basic DI circuit is nothing more than a buffer and a final gain stage that has an extra opamp that takes the output and inverts it to provide the extra output needed for the balanced XLR jack.  I used the basic circuit that Jack Orman published.

    Then I added these features as options:  Switch for -15dB input pad, High cut filter, input attenuator pot, -15dB output pad switch, phase invert switch, output level pot, ground lift switch, Marshall 4X12 cab sim switch, bypass 1/4″ jack, Inverted out unbalanced 1/4″ jack, normal out unbalanced 1/4″ jack, balanced out TRS 1/4″ jack, balanced out XLR jack.

    I did not add a phantom power switch but that is possible.  I used a smaller vero for the cab sim circuit and a larger one for the rest of the design.

    I made one of these for a local club sound man.  I hope this helps inspire builders!

    I

     

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