The clones are basically Class-H on roids.
As I understand it, it uses switching elements to provide only the necessary amount of power to keep the DC capacitors charged at the necessary voltage to operate the output transistors for the amount of amplification required.
Instead of having a big blob of copper and a rectifier bridge and large stepped-voltages that are either too-much or not-enough...
That's why it's ~90's efficient vs ~40's efficient
The output transistors on the clone operate in Class-B or something like that...
The clones are not Class-D.
Class-D takes the wall-AC and switches it directly into unfiltered signal-AC, and then pushes that into the (~30khz) filter banks.
This is why it is so lightweight and efficient. The hard part is finding transistors that can switch at the voltage/current/power levels required at hundreds of kHz.
You may see some better technology leaked to the public soon-ish, the DOD just got their patents
approved for room-temperature superconductors and anti-gravity amplification just a few days ago...
About flipping time!!! They've only been hording this tech for ~70 years!
This is world-changing (and hopefully not world-ending) tech. One cannot stress enough how IMPORTANT this news is.
Oil and Rockets are officially