Hello . Thanks for your response.
The PolySaturator runs at 18 V ( https://pigtronix.com/power-requirements/) and I want to know if the PolyHog kit does too.
Reason : headroom , clarity , hi-fidelity , etc.
I haven't seen the 18V version, although I've read that it exists. The only one I've seen (or can even find pictures of) is the 9 - 15V version.
The maximum supply voltage would depend on the components you use. I don't supply any of the components you might have received in a kit (from Musikding I assume?) so can't comment on the voltage rating for the components you have.
As long as the electrolytics are rated at 25V or higher you should be good to go up to 15V. Beyond that is uncharted territory.