After having completed a Sunn T (with help from folks on this forum), I went and ordered my second kit – the One Knob Fuzz v2 (Colorsound). Per the description on this site, the PCB has the A/B pads “for further modification.”

Before I get too far in putting it together, I was curious if there are any examples of anyone doing something interesting with the A/B pads.  I understand there’s nothing that <span style=”text-decoration: underline;”>needs</span> to be done with the A/B pads, but I like to tinker with stuff (usually to my own detriment).

I’ve searched all over the interwebs, and this forum, but haven’t found any examples of how to make use of the A/B pads.

In looking at the schematic, it seems like the A/B pads would, if jumpered, bypass C3 (220n) just before the volume pot:

Anyone know what purpose C3 serves?  Wasn’t sure if one could add a switch between A/B and have different capacitors selectable for C3, and what different values would do to the signal.   Or if C3 just plays some sort of role with respect to something like impedance, and has no impact on the audio signal.  In which case, I’d guess the A/B pad is just an easy way to add a different circuit into the board.

In any event, would love to hear what folks think could be done.