@paradoxper Wanted to take this a step further so I put on a metal album through the WA6 Gen 1 - headphones more than loud enough, no detail lost.
After that I plugged them in to an AudioQuest Cobalt into my iPhone - again enough power to drive them and sounds great. The volume is almost all the way up, which is JUST about too loud for me.
At this point, I'm starting to think these headphones are pretty damned easy to drive so I plug them directly into the headphone to lightning adapter with no additional amplification and AGAIN - I'm still getting great sounding output with these headphones. The volume is all the way maxed out so in this configuration, I could be maybe missing something but honestly it sounds pretty damned good to me still.
I'm not complaining about the industry because they gave me advice I didn't like - the industry gave me a non-answer based on marketing fluff, period.
Are these headphones harder to drive than Airpods? Sure. Do they require a nuclear reactor to drive them? Think again.