This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Thursday, April 19, 2018

Active Baxandall Network

Got a request for a Baxandall tone stack daughter board, (much like the Big Muff Tone Stack daughter board) and thought it was a great idea as it's a great tone control. The schematic for this came from this article, which is worth the read. I've laid it out two ways, one with board mounted pots, and one without that's a little more compact.


Note on the board mounted pots version the fill on the PCB is not ground.
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38 comments:

  1. PeteApril 19, 2018 at 10:32 AM

    Verified - I did the smaller layout, on perf.

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  2. BerkicauApril 19, 2018 at 11:16 AM

    where is it placed, before or after the main board?

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    Replies
    1. Effects LayoutsApril 19, 2018 at 11:42 AM

      You could try either place, but I would think after would be the most effective.

      Delete
    2. BerkicauApril 19, 2018 at 10:40 PM

      Owsem! Let's see how if it is stacked to OD-1

      Delete
  3. p0mp0April 19, 2018 at 11:27 AM

    love it

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  4. jandalesandsApril 19, 2018 at 5:13 PM

    can i add a split n blend to make it a new pedal? just asking.. thanks

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    Replies
    1. Effects LayoutsApril 19, 2018 at 9:30 PM

      You could. Or just throw a buffer in front and have and make a 2-band EQ.

      Delete
  5. le Fuck youApril 20, 2018 at 12:08 AM

    I don't know, man.
    Never have I constructed a baxandall that actually sounded good/useful to my ears. It seems as though the circuit works just to drop the entire frequency range and then allows you to reintroduce the top and bottom end (albeit unfaithfully and never full-throttle).

    Perhaps something in the nature of the baxandall circuit solicits the need for a gain stage prior to the EQ? or even a post-EQ "recovery" stage? I thought the "active" implement here would counteract the need for such? idk

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    Replies
    1. kramerianApril 20, 2018 at 8:38 PM

      so, you dont like fx like BB pre, AC/RC, spark booster?
      or you need like 3 baxandall?

      what about James tonestack?

      i think you just want say, baxandall isn't your taste?
      me too. Hahaha

      Delete
  6. pete_gMay 2, 2018 at 8:32 AM

    What about one of these with a Marshall BMT tone stack?

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  7. MetalheadJuly 27, 2018 at 10:39 PM

    Only bass and trebel control
    How to add mid control?

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    Replies
    1. e.harrisAugust 14, 2018 at 1:29 PM

      If you swap out the resistor from Bass 1 to ground with a 15-50k potentiometer wired as a variable resistor, you'll have a mid control, but it's more accurate to say that it varies the amount of scoop, because it's really varying the corner frequency of the Bass filter. It's not the same as an FMV tone stack by a lot, but gives you a mids control.

      Delete
  8. 182February 11, 2019 at 12:25 AM

    New guy here, I was wondering, what would the frequencies be for the bass and treble control? Would there be a way to determine what frequencies the bass and treble knobs control? Also, would the there be a 'flat' setting, all the way ccw, cw, or straight up the middle? Thanks :)

    ReplyDelete
  9. DavidMauroJune 11, 2019 at 8:34 AM

    Hi! Could it work as a tone control integrated into a bass guitar?

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    Replies
    1. Effects LayoutsJune 11, 2019 at 9:55 AM

      You could try it, but it's definitely not designed for that. I'm working on an on-board bass preamp that'll be out soon.

      Delete
  10. UnknownJuly 29, 2019 at 5:42 PM

    Any onboard preamp pcb for bass

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  11. Gour SahaAugust 10, 2019 at 3:28 PM

    Plz want to any good onboard bass preamp

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  12. JunmarFusilleroOctober 20, 2019 at 9:41 PM

    Built it.it works but i have a volume drop issue..any suggestion on how to solve this? Thanks a bunch

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  13. Boon Boon catDecember 8, 2019 at 10:19 PM

    Hi , how can i connect baxandall or other with distrotion in circuit?
    Plz explain i'm beginner..
    Thanks for knowledge

    ReplyDelete
    Replies
    1. Effects LayoutsDecember 9, 2019 at 12:57 PM

      Easiest way would be to just take the output of whatever circuit you're adding this to and running it to the input of this baxendall layout. Then the baxendall out becomes the output for the whole thing.

      Delete
  14. Boon Boon catDecember 10, 2019 at 12:59 AM

    Thank you
    One question, what happens? if i connect passive baxendall with 9v distrotion
    Dose it work?

    ReplyDelete
  15. sinaiApril 14, 2020 at 4:09 PM

    where i can find print layout in misc???
    searching but didnt find.

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  16. sinaiApril 17, 2020 at 6:56 AM

    This comment has been removed by the author.

    ReplyDelete
  17. pete_gJuly 20, 2020 at 5:10 AM

    Sounds great

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  18. FernandoAugust 6, 2020 at 11:33 AM

    Just like JunmarFusillero up here, I also have a significant volume drop. Any ideas? Thanks a million!

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  19. dsfAugust 26, 2020 at 11:11 AM

    https://www.youtube.com/watch?v=7VQVhnGZY90
    this layout + Split n blend

    ReplyDelete
  20. EdoAugust 31, 2020 at 3:47 AM

    Hi! If I wanna tuck simple volume control after it, potentiometer with lug 3 to output caps, lug 1 to ground and output jack from lug 2, what value will be the best? 10K, 100k or 1 Meg?

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  21. RiccoOctober 10, 2020 at 3:15 PM

    386 Works?

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  22. Ismail cJanuary 2, 2022 at 7:36 AM

    This comment has been removed by the author.

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  23. Ismail cJanuary 2, 2022 at 7:36 AM

    tried 4 tl071, any of them doesnt work on this circuit, I tried breadboarding with one side of ne5532 dual opamp and it works. Any opinions on this stuation? Are my tl071s bad or what

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  24. Tony HarkerJanuary 2, 2022 at 9:57 AM

    Ismail the TL071 is a single op amp and will not work in this circuit. Your ne5532 is a dual op amp device.

    ReplyDelete

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