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.

Saturday, January 17, 2015

Zvex Box of Rock

This layout is for the distortion side of the Box of Rock. The Boost side is just a SHO. I've laid this effect out for top mounted pots like in my other Zvex layouts and should fit vertically in a 1590B. Pots are 1.1 inches (28mm) apart.

Board dimensions: 3.2 x 1 in. or 81.3 x 25.4 mm


  1. Can anyone confirm if this layout works?
    I've build it, but so far I have not gotten it to work

    1. Someone has built it successfully, so it should work. Have you taken an audio probe to it?

  2. Verified (again :-) )
    The most dynamic and clean distortion I've ever built.

  3. An observation. In some schemes I have seen that the 56nf capacitor is 1uf.
    What is the reason for this difference?
    Thank you

    1. It's a coupling cap: not a big deal.
      I guess the difference between them aren't too much noticiable.
      Maybe less muddy/a bit more bright with the 56nf?