4 knob active/passive pre w/ passive tone

[LowG]

I'm pretty new to the world of active electronics, could use guidance...

I have a 90's Warwick Fotress One. It is stock, has PJ pickups and has 4 knobs: vol (push/pull passive), blend and active treble, active bass. When I used to play it a lot I'd just play it active and use a slight bass boost.

My tastes have changed such that I more often these days play a regular passive PJ wired VVT.

I want to start playing the Warwick more now and want to use it passive most of the time and utilize a traditional passive tone knob. So I want to replace or mod the electronics to do this.

I figured I might as well make it still active and passive. But one thing I don't like about the stock active treble/bass is how extreme they are, so I'd prefer the new setup to have freqs less far up/down the spectrum.

Any tips?

 

[MovinTarget]

I wonder if something like the Noll i just bought could be wired like that.

Its 4band on 3 stacked pots with p/p active passive. This means that you have one knob left for passive tone. It would just be a matter of routing the signal to that passive tone when you "pull"...

 

[Northfear]

Any preamp can be wired this way. Noll even got pots that combine active tremble and passive tone if you don't want to use stacked pots or drill new holes (boosts tremble after 50% and cuts tone below 50%).
If you're not experienced with wiring, Nordstrand wiring diagrams might be a good starting point.
Preamp Wiring Diagrams and Schematics
Look for the ones with tone control and Volume/Volume or Volume/Balance, depending on your current wiring (I believe its V/B)
This one looks like the closest one to your wiring
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