This was always the surprise with the Sabre (and latterly with the Stingray HH).
You see two Music Man humbucking pickups, and think "Awesome! Twice the power of a Stingray".
But when you solo that neck pickup, instead of sounding like a Stingray with an even meatier tone, it instead sounds like a Fender Precision with less pronounced mids.
Is that what you're finding?
Or is that what you were expecting, and instead it sounds like a Fender Precision with less pronounced mids and the tone rolled all the way off?
The first one, i was expecting it sounding like a Stingray with a meatier tone.
I managed to find another Stingray with the exact setup in a guitar center today. Only one guitar center sells Stingrays in Istanbul and they had only one Stingray in stock.
Anyway, both of them sounded different. Mine sounded much brighter with less low mids and much less meaty. The salesmen also agreed me after listening them both and told me it could be because of the other bass has much older strings and set up.
Then i visited a luthier to get a more precise set up, then it appeared my E string is somewhat dull compared with the others, he told me he couldnt hear anything wrong with the electronics, but also he didnt listened the other bass as well to compare.
Anyway he did the best setup that he can. He also told me that i can try another brand of strings next time to see if it makes any difference, since the strings are brand new, he told me to bring the bass after a week because the strings are more stiff and less elastic at the moment because they are brand new. I used Daddario NYXL roundwound 45/105 by the way.
Other than those, we have regular Daddario, Dunlop, Elixir, Ernie Ball Slinky and Fender strings only in guitar centers. La bella, Rotosound, Thomastik are almost impossible to find.