What is the opinion of Reddit about the
iFi Pro iESL Electrostatic Transformer Coupled Headphone Energizer for Electrostat and Dynamic Headphones – Home Audio Upgrade?

See if you look at the back of this energizer you see speaker wire terminals to connect a speaker amp to the energizer which then converts the amplified signal for use with high voltage biased electro stats.

https://www.amazon.com/Pro-iESL-Electrostatic-Transformer-Headphone/dp/B071KGN52P