Best i-Device portable DAC ever listened to, very neutral and smooth like from a desktop DAC. Currently using it with my iPod touch 5 (Yes, it's support lightinig connector). I will prefer filter (2) than (1) as (1) is more flatter. Built-in amp is not powerful enough to drives some headphones, currently I using SE535 and Bowers & Wilkins P7 both headphones sounded perfect with HP-P1.   Now battery is the most problem given to me. After 6 months I get HP-P1, the battery seems to be not function at all but under warranty my dealer change it...

I don't own it but in fact my elder brother get it yesterday and I am the one who first testing it. First impression on Momentum is that it is a very well build quality headphone with a very thick high quality case (some said very bulky due to it's unable to fold), but a poorly design headband adjustment. I listen to it about few hours with my iPod touch 7+ Fostex HP-P1, and with Violectric DAC 800 + Violectric V200. Kind of weird when fist listen to it especially the highs but you will get use to it after a while.   Highs: Kind of weird when first...

Been owning E17 for about 2 years also my first amp, glad to see Chinese product that can come out with well build product!!