Its good to have a large flat freq range but there are other things you need to check too. For example, a driver will have it's own inpedance that reacts with the filter. The two component filter you have is made to work with your old tweeter's electrical characteristics.
If you look at this 2nd Order High Pass Butterworth Filter which seems to be what you describe (a cap in series with the driver and a coil accross the driver), you see in hte formula that the tweeter's inductance is part of the formula. The values of the passive components are tied to a particular tweeter's inductance at the xover point.
In any event, it has been quite a while since I did much with 2 way speakers and I ain't no expert. The point is that there a few other issues too. The forums above are good places.
Good luck
I remain,
If you look at this 2nd Order High Pass Butterworth Filter which seems to be what you describe (a cap in series with the driver and a coil accross the driver), you see in hte formula that the tweeter's inductance is part of the formula. The values of the passive components are tied to a particular tweeter's inductance at the xover point.
In any event, it has been quite a while since I did much with 2 way speakers and I ain't no expert. The point is that there a few other issues too. The forums above are good places.
Good luck
I remain,