Ok, so you confirmed both that you are ignorant and that you are an anti-class-D troll (maybe because you think it is digital, and are one of those luddites who don't understand digital technology).PWM in class D is not a copy of original analog signal, it's essentially newly generated digital PWM signal (zeros and ones) modulated with source analog signal, the modulated PWM signal is then amplified. The problem is extracting the original analogue signal without distortion is nearly impossible, hence class D remains a niche amplification technology mostly for subwoofer use.
I wonder is Hypex a derivative from hype?
An analog signal is also not a perfect reproduction. It is an approximation of the original acoustical signal that is converted into a newly generated voltage, optical signal, or in worst case a mechanical approximation. Extracting the original signal without distortion is impossible.
Just because something is zeros and ones doesn't mean it is digital. You might be confusing it with binary. Digital means representing a signal by regular samples of discrete numerical values - the term "digital" comes from "digits" - numbers, and originally "finger", as in "counting on fingers". The french term for digital, "numerique", describes it even better.
Hypex and purifi use analog PWM. As I explained, they can vary the pulse width continuously, without any discrete steps or quanta.
You also still seem to confuse limited bandwidth with distortion.