These babes are well nigh miraculous, right out of the bag! I attached them to my Magic A3's, which do not have a reputation for lacking resolution or clarity. But with these devices attached, the proverbial window was wiped clean, soundstage expanded exponentially and piano and female vocals, which I use to audition equipment, never sounded so real.
I am generally skeptical of add-on devises like this, but had owned several LessLoss PC's and think Louis Motek is an original. Cannot speak to others' experiences, but I am mightily impressed. Best $1600 I have spent in a long undistinguished audio career.