Check these reviews and tour threads for the sound quality.
Dunu:
http://www.head-fi.org/t/695577/review-dunu-dn1000-immensely-capable-hybrid-iem
T-Peos: http://www.head-fi.org/t/661964/review-t-peos-h-200-3-way-hybrid-earphone-welcome-the-changes
Astrotec: http://www.head-fi.org/t/687252/australian-tour-impressions-astrotec-ax60-hybrid-3-way-universal-iem-2-x-ba-dynamic-driver
Isolation: AX60 has the least due the shallow insertion, H-200 and DN-1000 are about even, remembering isolation is very much tip dependent and seal, you cannot judge isolation off a simple IEM housing, I don't understand how people can assume such a thing (not you) when isolation is coming from tips, insertion depth, fit, seal. Something here that always baffles me......
Build: All 3 are built rather well, with advantage to H-200 having removable cables. Although this seems like a nifty feature to have the proprietary plugs T-Peos use makes life very hard for example, it's not so easy to go out and buy an upgrade cable for H-200. I assume getting a replacement stock cable will be no problems as T-Peos are very helpful with warranty, only a big part of having removable cables for us here is being able to upgrade to custom. T-Peos have come out with some however they never became very popular due their not so interesting price. On the Dunu you have rather short strain reliefs leading into the large housing, on a large housing something that worrys me, however they seem strong enough so far. AX60 has the better stock cable, it's thicker giving a feeling of confidence. The reviews will tell you more about this subject. (read the thread links for more info)
Fit: I've read fitting problems on all 3, you must research. I only had problems with AX60 to some extent.
Now time for a story.....
I owned H-200 for about 6 months, really enjoyed it's rather energetic signature and bass texture, I found it quite superior for my preferences over Westone 4, (which I sold keeping the H-200) however if we're going to strip it down I also found H-200 a little fatiguing for long listening sessions and lacking in soundstage width, keep in mind some people don't hear this narrow stage but I often wonder what their point of reference is. I also discovered higher volumes emitted the most clarity and detail, you kind of needed to extract the detail rather than come across effortlessly, it was however wonderful for on the go and I loved it, enough to spend crazy amounts of money on an upgrade cable from Korea. Then, I was offered an opportunity to demo AX60 which you'll read about in the tour thread.
I thought it was great, immersive soundstage meaty bass response but maybe a touch loose or bloated, as you will read some members hear AX60's low end lacks speed and others feel a disjointness between the dynamic driver and balanced armature. I personally couldn't hear this and happily listened away. I found it to have a touch more detail than H-200 and especially wider staging, it also has a special kind of timbre that blends in with the clarity giving it a semi hi end sound, but I couldn't help disagree slightly with it's mid range tonality which was a touch warm for my tastes, I would of much preferred AX60 to lean a little cooler and with less low end emphasis. I was almost sold on purchasing one though, the immersive staging and impressive coherency had me won over. I had even organized with a local online store here to order....
Then, then came DN-1000 which a kind member offered to let me audition as I didn't believe all the nonsense in the thread. Soon as I heard the Dunu I thought YES, this is where I want to be, it had the staging, the crisp clean tonality and detail I was looking for, also sounds rather classy within it's timbre, I started questioning how it sounded next to my H-200 and thinking about AX60's warmer mid range, the Dunu just sounded cleaner and clearer, more transparent than the other two. I become rather swept away in a matter of days never getting out of my mind 'this is where I want to be'. On the fourth day weighing up the $100 less price tag of DN-1000 next to AX60, I honestly couldn't see where the extra $100 was going, especially when Dunu had the tonality I wanted and AX60 being a touch warm. Mean while, my H-200 were just sitting there (well they were actually on loan), boredom maybe, after 6 months and immunity of it's signature? Hmm...
In the end I forgot about AX60 and ordered DN-1000, within one week of receiving them sold my H-200 and never looked back. DN-1000 is one of the best purchases I made all year and one of the best hybrids I've heard in 2013. (besides 1Plus2 which we spoke is completely different beast) Remembering this is just me and my preferences, however there's many of us out there who think the Dunu is better value for money over AX60, and well H-200, it's kind of February 2013 and many of us have moved on....
I hope you enjoyed my story finding it beneficial to your purchase.
