After using/evaluating the N3APs for about 5-8 hours per day for the past couple weeks, I am beyond impressed by their tonality and musical presentation (with the metal eartip mod and silver cables). I think I mentioned this above as well, but after listening to these at moderately high volume, I experience no post-listening session ringing in my ears, which is a great sign. Interestingly enough, I was highly skeptical about cables being able to change sound perception (I have studied RF engineering, and the frequencies at which cable capacitance/inductance/resistance begin to cause cutoff are at much higher frequencies than audio frequencies. Nonetheless, I didn't want to be a book-donkey who thinks something doesn't exist simply because it cannot be measured with current technology). I got the silver cables purely out of experimental curiousity, and was completely ready to stuff them in a drawer if I didn't notice any change. Well, low and behold, even with a skeptical mind during the listening, the midbass cloud actually was removed. Multiple 5-8 hour listening sessions with a skeptical mind and no post-session fatigue confirmed this...impressive stuff. The N3AP presentation is quite interesting, because it combines a grand soundstage with rich notes. Typically IEMs I have listened to have a small soundstage with rich notes, or large soundstage with thin notes. My ER4XRs have a wide and flat soundstage with thin notes, but with that comes excellent detail, and a moderately enjoyable experience (As well as very fast tight bass...musicality and timbre could be better). The N3APs have rich notes, 3D soundstage, less detail than the ER4XRs (about 90-95% of the ER4XR's), but a much richer and musical experience (although slower bass on fast and detailed metal tracks, such as those by Stratovarius.). Everything has room for improvement though. If I could, I would improve the N3APs in a few ways: 1) Bass: Some other reviewer described the N3AP bass as subterranean....that about sums it up. Clear but cavernous. This kind of goes for all IEMs, but I would love to encounter an IEM with the speed of an electrostatic transducer, but the timbre of a wooden diaphragm. That would be equivalent to discovering ice cream cake that also is as healthy as a plate of vegetables. It is an unfortunate tradeoff that I consistently see in all IEM reviews, at any price level: timbre for speed. The N3APs have about a 60/40 timbre/speed split (timbre 9.2/10, speed 8/10). ER4XRs have about a 20/80 timbre/speed split (timbre 6.5/10, speed 9.8/10). I want a 50/50 timbre/speed split, with 10/10 for both. 2) Mids: Regarding the mids (female voices to be exact): the N3APs present female vocals as a warm scarf surrounding your head, and they sound beautiful. Smooth, 3D, but not as intimate as I would like. As I said, everything has room for improvement. I would love an IEM that could retain fast and rich bass, with ascendant highs, but also be able to simulate a womans whispering in your ear when the track calls for it. Like, you can literally feel her lips tickling your concha type of intimate. 3) Highs: These do highs so well, I would probably have to listen to flagship IEMs to understand how to improve the highs. These N3APs are essentially impossible to get to be sibilant. Try any track you want. The highs are like drinking purified, filtered, distilled water. I purposely waited a little over a month to give impressions, to avoid any potential hype clouding judgment. Hopefully this analysis and impressions help everyone out there looking for information for personal and comparison purposes. I know I enjoy reading about headphone impressions of IEMs I have, because it helps form a picture of IEMs that people compare it to.