The short answer in no, you typically can't just throw in a different driver and expect things to work properly. (Sidestepping the debate over whether any NS-10 ever actually worked properly
![Wink ;)](./images/smilies/icon_wink.gif)
)
However, a retrofit shouldn't be a big deal. This site gives the crossover schematic (plus some modifications) for what I'm pretty sure is the newer version of the NS-10.
http://www.dillonacoustics.com/Loudspea ... _XOYA1.htm Check your crossover and see if the tweeter section is the same. If yes, then just pop the newer tweeter in. If no, replace the old crossover component values with those in this schematic and the newer tweeter should work fine. The woofer didn't change, so no modification of that section of the crossover is necessary.
You might also need to modify the cabinet a bit to make the newer tweeter fit, but this is all very doable.
Hope this helps!:)
Thomas