I received my monk+ today. I tried them on my ear with the thin foams, my source is Iphone 6 & Dacport Slim. All these following impression is with my Dacport. The sound in general is quite difference compare to full foam original monk. The sound is thin, mid is dry, lacking that smoothness touch of the original monk, highs are shouty, bass is lacking comparing to original monk, I listened to Neil Young - Cortez The Killer and could not stand the whole song, poor performance. I then put on the full foam, the sound is now balanced, no more high sharpness, the mid bass is also improved tho sub bass is shallow, almost non existed. Details and separation are good, also the expansive sound stage is nice. I don't like the monk+ with my Iphone 6, the sound is too dry and analytical.