Sunday, 14 December 2025

EHX / JHS Big Muff 2

 Schematic is avaiable HERE.




 

9 comments:

  1. I'm trying to understand the difference to the big muff IC .
    Noticed ground is not specifically labelled. I suppose volume 1 is!

    ReplyDelete
  2. This one uses 2 4558’s & has four stages, the opamp BMP has a 4558 & a 741 & has 3 stages. It’s also more bass heavy than the original opamp BMP?

    ReplyDelete
    Replies
    1. I noticed the IC difference, so one more stage for this pedal! Thanks for the info.

      Delete
  3. Add ground to row R (under input) and I think it's all good.

    ReplyDelete
  4. I'm probably in the minority here but the amount of low end this thing seems to have, from clips, was giving me anxiety. I also hate how harsh most IC Muffs sound. I can already tell that I would want to perhaps change the taper of the Tone control. If somebody builds and modifies it be sure to share your tweakssssss.

    ReplyDelete
  5. @Tom. I can agree with you as far as the bass is pretty heavy. Although I find the 100k pot to give a nice range of tone. But yea, bass heavy for sure. You can verify this as well. Thanks for releasing this so fast!

    ReplyDelete
  6. I look forward to seeing what tampering with the diodes will do. Ge, asymestrical, yadayada.

    ReplyDelete