Yes it would appear to be madness supplying 15.5v to a cap rated at 16v. My current bench type linear supply is set at 13.8v (and I have measured it to check) and I use that with my Caiman and it sounds great (just not a fan of switchmode supplies I am afraid).

I have been checking out Avondale's regulators (TPR's) for a possible self build project as well and Les thinks he can tweak one for me to give 13.8v and around 4a peak. The cost will be significantly higher than Stan's special switchmode though and may not be as good!

I always test out my own supplies on a worthless well bodged TC7510 before plugging it into the Caiman as well just to double check.

Regards