It was mostly adjusting the design to different parts and the weird stuff were the PCB caps that Stax decided to use... plus the enlarged the amp chassis for no particular reason. In terms of being better than the 252S... nope.

As it turns out, Moondrop are finally releasing the MoonZero soon:

https://www.hifihub.com.br/en/product-launches/moondrop-moonzero-445-electrostatic-headphone-takes-on-the-stax-sr-x1

This image courtesy of Fujiya Avic:

Looks cool and if they can bring them in for under 500$... that is mighty tempting.

Edited Saturday at 03:03 AM3 days by spritzer

@spritzer are you excited for the ES Labs HE90 clone? Will likely run on 580V but same materials, stator and membrane thickness etc...is it something you look forward to or is HE90 still just okay next to 007 Mk1 etc :)