What a subs` resistance really is?

[Shannon]

Shannon has even said it is superior because it forces the subconscious to process it.

If you're going to quote me, or credit me for having said something, make sure you understood what I said. In this case... headphones force the brain to experience perfect stereo separation, which causes the stereo-spacial effect to kick in fully. The more completely the brain experiences the stereo-spacial effect, the more completely it must engage both hemispheres of the brain cooperatively to process the script, and the result is about a 125% boost in effectiveness.

But headphones are easy to have problems with (overvolume, undervolume, and the results thereof) if you can't consciously hear the audio. We recommend against headphones with ultrasonics for this reason.