D
Interesting...
I don't know much about pickups. So, just wondering... Would the CS60 pickup that came stock on my 2014 Am Std Precision be considered one of those "darker" and "aged" ones?
I ask because the La Bella flatwound 104E (760FL) sounded a bit too muddy on it for my taste.
The CS60 is what I would consider a very "middle of the road" P-bass pickup. Personally I think it's a nice sounding pickup that works fine with LaBellas. The Fender Pure Vintage 63 on the other hand is a pickup I find too dark and bloated in the lows for most old school flats.
But the bass itself will matter too of course. Some P-basses are just inherently brighter than others.
Maybe you simply don't like the tone of LaBellas? They are certainly not suitable for all types of music. Or maybe your pots have slightly lower than 250k resistance? That would definitely give the bass a darker and potentially muddier tone. Pots can vary a LOT unless you buy the more expensive ones with tighter tolerances. I often see Fender basses with factory equipped pots that are between 220-230k. The lowest I can remember seeing in a brand new Fender was 218k. The difference between 250k and 220k is definitely audible with a P-bass, especially the volume pot. With flats I usually install pots that are slightly above 250k for a bit more clarity when I lower the tone control to what I consider the "sweetspot" on a P-bass (about 1/3 down when the mids start to thicken a bit due to the resonant peak you get with passive tone controls).