Further Charge Coupling question: has anyone tried a mismatched series of caps to get a capacitance value in between standard values?

I.E. on a tweeter 1uF is a standard, so in charge coupling we would use 2 2uF caps in series. Would it work if I used a 4uF and a 2uF in series? The resulting value is not 1.5uF, but it is less than 2...

eso