How many power supply devices do I need?

I think you’re talking about a Panamax. Panaflex is a motion picture camera.
A power conditioner is not like a linear power supply, it filters and cleans the dirty power and grunge coming into your house. Most of them also have surge protection

Plug your components into the power conditioner to reduce noise from the electrical system in the house. It does not power your components.

https://en.m.wikipedia.org/wiki/Power_conditioner

https://en.m.wikipedia.org/wiki/Power_supply

What really gets me is all this effort trying to squeeze a tiny little bit from the wrong ideas about power when in the end it all goes into a..... avr.

MC, you know that and I know that.

OP: what amp, AVR, and speakers do you have?