I am not sure that I can agree with the opinion that variable capacitance is not useful or not as useful as the cables being used.
I have done many capacitance changes via dip switch settings and it makes a world of difference in performance. I made an error above when I said I the PH10 has a default setting of 200 pf, I found a spec they published and it's at 220 pf. I am running 250 pf on my Clear Audio therefore I'll assume that it's close enough to the PH10 for comparable performance in that respect.
I have done many capacitance changes via dip switch settings and it makes a world of difference in performance. I made an error above when I said I the PH10 has a default setting of 200 pf, I found a spec they published and it's at 220 pf. I am running 250 pf on my Clear Audio therefore I'll assume that it's close enough to the PH10 for comparable performance in that respect.