Hey, yesterday I received my Bartolini MMK pickup and gave it a shot in my stingray.. This is a treble enhanced version of the MMC version and string balance, clarity and deepness were immediately apparent.. Even volumes on all strings and up and down the neck as well.. But the stock stingray preamp left a little to be desired w/ this pickup.. So I had a spare Bartolini NTBT 2 band preamp laying around and decided to give that a shot. I wired it so there's just a volume knob and a stacked bass/treble boost & cut.. I moved the output jack for that preamp to the top as well (Still an extra hole for now, may add a coil switch).. Anyway, it sounds WONDERFUL. The mid punch, smooth but cutting highs, and lows are all there. I wouldn't recommend this pickup with the stock preamp alone, but with an ntbt preamp it sounds incredible.. Just figured I'd share I still have the original 'ray electronics laying around, but think I may stay with this setup.. It surprisingly even has MORE output than stock.. If you can find them, the MMK and MMX pickups sound far superior to the MMC in my opinion..