These seem to replicate 51/54 Fender pickups well. Punchy, big sound but a bit more focussed sounding than the, later, Split P design. I hadn't expected there to be so much detail in the notes when using roudwound strings (my experience with a 54 P bass had flats on it.... String zing, colourful high mids, growly low mids, tight focussed bass. A bit like a slightly over wound J pickup, with a lot more punch and thicker sound, but a lot of clarity.
Whith flatwounds this pickup punches out solid, midrange-heavy, tones.
(I use DR rounds and tried Rotes and TI flats... the it's will live on this bass for a while... however I think Fenders may do it more justice...)
Great Pickup
Love it!