The one tweak most Focals need ...

From a lot of work done analyzing Focals, if you have one, especially an older one, and want to improve the sound and maybe learn something, try upgrading the tweeter caps.

Usually this is 1 or 2 film caps in series with the tweet. I can recommend Mundorf MKP as well as Clarity CSA as being good improvements.

Of course, you probably wouldn't want to mess with your Utopias, but for the mid to low end, highly recommended.