Most hated tonestack: Daddy O

[ayayay!]

Gimme a reason to like this tonestack.  Really.   

I like the Daddy O, after modifying it a bit, but I can't stand the tonestack.  It would help if I would understand it a little better.  I just don't get it!!! 

Help me understand it.  This schem is one of the cleanest I've seen of it, so I hope it helps.  It's kind of Marshall-y, but the Bass control is 10k and goes to ground.  And what would add more bass?  Increasing the .1 feeding the bass wiper?  And what's up with the 680 there as well, feeding between wiper and ground? 

[ayayay!]

Bueller?

[ItZaLLgOOd]

I'll take a wack at it.  I think that the 10k and the .1uf are just a variable filter. The 680 works in parallel with the 10k and sets a minimum.  I think that raising the 0.1uf value would get you some more bass, maybe adjust the 680 as well.

Hopefully some one can tell you what is really going on

[ayayay!]

I think that raising the 0.1uf value would get you some more bass,

Yeah that's what I was getting at too, but I think that's also gonna make the mids really screwy.  I guess I don't understand the mids and bass control interactions very well on this.  For one thing, the 10k pots for all 3 tone controls is kinda strange. 

But also on the bass control I think it would have been better to put the .1 cap (more like .22 maybe) into the "input" lug, not the wiper. 

I dunno, I'm just trying to wrap my head around this one...

[ayayay!]

Waiiiiit a minute, I think I'm starting to get it now.  Looking at a different schem can sometimes reveal the obvious.  On the Guv'nor it's a little more clear, but looks slightly different (to me at least.)  There are two 680's feeding the bass portion, making a basic divider.  One side has a cap, the other doesn't.  

So turning fully CCW will make that cap "disappear."  Turning it fully CW will make it fully on.  I think it wouldn't need much of an increase, maybe just up to .15.

Here's the Guv'nor
http://www.freeinfosociety.com/electronics/schemview.php?id=476

And Brian's copy has a line drawn on my "confused" point, so it makes more sense now.  

[Johan]

that is one weird looking thingy...I think the 680 Ohm resistor is there to alter the curve/taper and value of the bass pot rather than than anything else. the bass and middle pots seem to be interacting.
the treble controll isn't completely unlike a BigMuff tone controll and if you keep that in mind, it becomes somewhat clearer..I hope someone like PRR or R.G. sees this thread and points out the details..
J

EDIT:...aaahh...ayayay:  somewhere between your and my reply lies the answer
EDIT #2: here is the guvnor factory schematic http://www.aronnelson.com/gallery/main.php/v/johan_0/guv_nor.jpg.html?g2_imageViewsIndex=1

[ayayay!]

the treble controll isn't completely unlike a BigMuff tone control

Yes, that's what made it click for me earlier.  I view the whole treble control as BMP'ish, where the mids control is simply tapped off the inside "high" side, and the bass control is hanging off of the "low" side.