If the preamp has a blend/balance pot and your single pickup is a 4 wire humbucker then you should be able to wire each coil to the balance pot. That way you can have humbucker or either single coil or part thereof as you want.
If the preamp has a blend/balance pot and your single pickup is a 4 wire humbucker then you should be able to wire each coil to the balance pot. That way you can have humbucker or either single coil or part thereof as you want.
Scott.