The one tweak most Focals need ...

Regarding the vast majority of speakers even at over $10 k many use 
capacitors which I consider substandard like Solen which are rated a 6 
vs 15 for the worlds best Duelund cast caps for example. I upgrade my speakers always . If speaker company will give you the Upgrade  options go for it .you can easily gains  15-20% better sounding Loudspeaker.

Hey @auxinput

I so don't like Mundorf's top end caps at all, that's why I didn't suggest them, especially not with Focal's tweeter behavior.

Then of course there is the physical size ...

I guess if I could describe the Mundorf MKP by comparison to Focal/Solen it is darker but a lot smoother.

The EVO scintillates. Adds a lot of color saturation at the mid/top end which is just not natural to my ears. That + the way those inverted domes sound naturally makes it go the wrong way.
The Clarity is more smooth, and also not nearly as dark as the MKP. It _is_ a better cap in absolute terms than the MKP, but ... like the Batman, I like the darkness. :)

Almost anything is better than the stock Solen PPA 250V caps.
There is also the inductor used for the woofer.  The wire thickness of the series inductor is embarassing.  You can measure a whole 1Ohm DCR in some cases.

Hey @johnsonwu

I agree with you about the caps, but sometimes DCR in a coil is a good thing, as it can be part of a baffle step compensation.  Don't go reducing that without understanding the circuit.

Especially in shunts like Zobel or notch filters.

Best,

Erik