This is quite confusing but interesting.
Do I understand it correct:
The Bartolini neck PU is designed to be more sensitive for low frequencies and the bridge PU to be more sensitive for high frequencies?
The neck pickup is made brighter and the bridge pickup is made deeper sounding.
Here's a description on
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59J1 pair- These hum-canceling duel in-line coil designs - The 59J1 has a bright Neck tone and deep Bridge tone.
The #1 windings yield much more "growl" from the Bridge pickup. They are very similar in tone to our old 94J 4 string pickups, just ever so slightly brighter at the bridge.
So the bridge pickups is wound hotter and with more low end to compensate for the fact that there is less volume and low end from the bridge pickup. This makes them balance more.
AndIbanez use them the other way around?
What is the sense in that?
That's correct.
In an Ibanez ad once they talked about Bill Bartolini working with Ibanez:
(Emphasis added by me)
We always try to satisfy as many bass players and builders as we can, so we developed designs to satisfy the new requirements and tastes. Most builders were satisfied with an approximately equal tonality from bridge and neck pickups. The neck pickups were always a little brighter with slightly less output than the bridge pickups. But some builders and players preferred putting neck pickups at the bridge and bridge pickups at the neck intentionally. Ibanez was the first to ask for much deeper tone from the neck pickup while retaining a bright tone for the bridge.
When Ibanez asked for special pickups exclusively for Ibanez BTB series, they also asked me to try to blend the older enhanced lows and low mids with the newer, brighter tone in a narrower soapbar design. Could we go beyond what had been achieved in this direction?
I had a SR-2000 here for a setup, and looked at the bottom of the pickups, and the neck pickup was labeled "T" (treble/bridge), and the bridge was marked "B" (bass/neck). So they had them in reverse.
I guess that's what Ibanez wanted, but I sure wouldn't.
I like a warm but clear neck pickup, like a more open sounding P bass. And then I like the bridge pickup to be bright but smooth, with good mids and upper lows, so it will sound solid soloed. They also mix together well.
On the other hand, they do amplify the acoustic sound of my SR1000 quite authentic. (might be some old fashioned, but I still like that)
A good pickup will will reproduce the acoustic tone of the bass. But they will also tweak that, so for instance you can wind the bridge pickup for more lower mids for a good burp, and the neck pickup to be deep and hollow, if that's the tone you want. But they will still sound like the bass they are on.
I started making my own pickups because the pickups I used to use didn't sound like my bass, they sounded like the pickups. Those weren't Barts. They make good pickups.