upgrading speaker crossovers

Why would it not be just a matter of slinging a higher grade cap into the crossover. if the values are the same, shouldnt they electrically do the same thing and then its just a matter of the better cap doing the same thing better?

Well a lot of good feedback. I ordered Mundorf Supreme caps to replace the two film caps on each crossover. Basically the same value but I am sure better quality. I am counting on smoother highs and a little more bloom in the midrange. These caps look like they are in line with the mids and tweets. I can now say that after upgrading my equipment I know what better quality caps can do. Trying to replace the tweeters could be a challenge because of the cut out, so I am hoping that the caps will do the job. They are in the mail so I expect to get them this week and do the change over this weekend. As for the electorlytics it does look like they are for the bass section, I can always pull one and check it out to see if the values are still correct and if not maybe get a better electrolytic to replace them, just thinking. And of course now I cannot use my turntable to listen as the needle in the cartidge is no longer there. Its a MC that came with it, Music Hall MMF 7. I am not sure if it is worth puting a new cartidge in it or getting a VPI Classic, which is more money, that I was not counting on spending after having my amp and preamp upgraded, but this is a different subject.

Why would it not be just a matter of slinging a higher grade cap into the crossover. if the values are the same, shouldnt they electrically do the same thing and then its just a matter of the better cap doing the same thing better?

you would think so and I'm sure any upgrade would have some benefit. Just reporting what Lou at Daedalus found in practice, that fine tuning brings added benefit. We all know there are real differences in the sinature of caps, regardless of quality.

I agree with Timlub when it comes to haphazardly replacing coils. On the other hand, I've had good experiences swapping out cheap 16AWG coils for 12AWG ones, particularly, the foil types.

Yesterday I replaced the 2 film caps on each crossover with the Mundorf Supremes. Did some listening and the speakers do sound better, the tweeters are not as brittle, the highs are still there but smoother sounding. I will need some time to burn in the new caps but I think this is what I am looking for, I will have to do more listening today. I just ordered my new turntable and will get it this week, can't wait until it gets here then I can try some vinyl.
For now I think that is all I am going to do the the crossovers, I want to let these new caps burn in, besides replacing those electrolytic's could prove to be a pain. Ever since I got my conrad johnson amp and preamp back from being upgraded the bass is great and they dig even lower, are more controlled and my soundstage is a little bigger, time will tell but it is as if I just purchased new equipment.