EQ a precision sound out of a BigSplit?

First: a Nordy Big Split is not single coil, its a split coil. Hence the name. Unless you have a Big Single, that is a single coil.

Second, how I would do it is either go to a music store and jam out on some P's for a while or spend all day checking out sound clips and vids of other people playing a P and try to duplicate they're technique and then adjust the eq to match. Its important to first cop the technique they use (finger vs pick, playing at the neck vs bridge) because no amount of eq is going to duplicate that.

 

The traditional "nasal" P sound comes from the pickup placement (in the most harmonically resonant place on the body) and from the E/A string side being more bass biased and the G/D side being more bridge biased. The sound is naturally very mids based, so experiment with boosting mids a little at a time, but leave treble flat. Make sure you have a little bass boost (say 1 o'clock on most amplifiers). If you have controls for low and high mids, go for the low mids boost first.

I'd imagine your Nordstrand big split is much cleaner and focused than the traditional P sound, isn't it?

 

The P bass sound comes from two major factors: the location of the pickup, and the build. P pups are usually closer to the neck that J pickups. On top of that the pickup is made differently. P pickup coils are wound in a formation that is shorter and wider than J style (tall and narrow) as well as the series wiring you mentioned. Everything about is inherently different. So its not going to be as simple as breaking down eq adjustment.

Best way to try is to play your P and your bass with the Splits back to back and keep making small adjustments.

Personally, the method I use to try to mimic a P bass sound on my jazz style basses is to use the neck pup then dial in a touch more mid and just a we little bit of low. But honestly, its still not the same.

 

Nice point - With the pickup winding being in a totally different dimension/direction, the sound is going to be naturally very different.