Re: VITAMIN Q Caps?
And like I said before, if you don't hear a difference, or are happy the way things are, there's no need to play around with caps, pickup, etc.
There's no reason you can't buy a guitar off the rack and get great tone.
But with caps, it's a bit tricky, and counter-intuitive. For some players, ca p like an Orange Drop, might be too "perfect" electronically. It's designed to be a coupling cap, and it does that very well.
Whatever a cap sounds like as a coupling cap, it tends to show opposite characteristics as a shunt cap. The easiest example is Ceramics sound brittle and harsh as coupling caps, and as shunt caps they're muddy and ill-defined.
A guitar's circuit, though, using a shunt cap. For some players, the fact that PIO's are less transparent, when used as a shunt cap, makes for a fairly unique tone. It smooths out the signal, and to many people's ears, is more usable, even at extremely low settings. Instead of getting muddy, it gets a vocal growl, and leaves a bit of sparkle, (Clapton's early "woman" tone is a great example of this, or his "Beano" tone. Duane's rolled-off tones in the Fillmore recordings also show this.)
Like I said, for most people, this stuff is probably too small or subtle to really matter, especially if you use effects or overdrive and distortion.
For me, personally, I make a living with my guitar, and I'm playing constantly. I don't use effects or overdrive pedals, and I try to get all the sounds I need from just my guitar and amp. When I have PIO caps, that job is much easier, and the tone just sounds more "Right" to me.
It's as simple as that, that's why I use them.