C61 is a crappy electrolytic capacitor. Removing it will have a
beneficial effect on distortion as well as increasing LF response. The
less electronics a signal has to go through the better. Removing it also
appears to remove a nasty click when switching between ensemble modes -
which was the main reason for me.
Making the LF response flatter is generally a good thing. There is no
need to make this optional. If you want to cut the bass then it would
normally be better to use the EQ on your mixer or DAW. I would guess,
perhaps wrongly, that most of us use some sort of EQ before or after
recording the Polysix. It's more controllable that way and will almost
certainly give you a better result than a simple singe pole low pass
fixed at 33Hz. And it's harder to put back what has been taken away than
to cut what you don't need.
Tony
http://takla-makan.bandcamp.com/http://www.oakleysound.com