The one tweak most Focals need ...

erik_squires.  How much do you think to rebuild a new cross over for a 3 way speakers home made 8" woofer, Vifa 1" silk dome tweeter, Audax 3" carbon fiber midrange. 25-25000 hz.  I want especialy more top end presence and definition, mid and bas are OK.  The present cross over is glued to the interior baffle, so I would need to complete rebuild it probably.  The cross over parts are not well known and never find the brand on internet.  Would it worth to change the tweeter ?

audiosense -

There are three ways for you to go I think:

1 If you want to try inexpensively, update any caps in series with the tweeter and midrange.
2 Get a miniDSP and attempt to EQ your tastes into the speaker
3 Get a brand new kit.

The hardest thing for newbies to do is take an old speaker and switch a single driver. It's a lot of work, and may not be worth it due to the quality of the parts involved in the original, the cost of the new crossover, etc.

This is totally a great learning exercise. You will learn speaker measurement and analysis, you'll get new tools, and be able to dial in exactly what you want, but .... it is ONLY worth doing if you want to invest in yourself that much. To do it to reuse the parts you have, not really worth it at all.

I think the newer Focal 2's & 3's use Mundorf caps.
And, I honestly would have no idea as to how to check without destroying the cabinet.

How did you get to the caps?

ozzy

I tweaked my Focal Sopra 2's the right way: I got rid of them; biggest audio disappointment thus far;  
 

Ozzy :

Often via either a panel in the back, or the woofer.