MT300. I must say that even if I've paid a full $160 price for it, - there wouldn't be any buyers' remorse. The bass-head dream. But that would limit my ability to enjoy it.
Can anyone tell, if MT300 bass will decrease with burn-in?
What was a total surprise though, - how well these metal shells fit my used to custom-universal resin ears.
MT300 is the best fitting metal IEM! Period. Isolation is also surprisingly good, so much so, that I could use it in NYC subway if I wasn't weary of moisture condensate.
Fiio could learn a few things. Unlike FD5,- MT300 I didn't have to uglify with band-aid tape. My cable is right under 120 cm. This is a good cable that brings mids forward, so flattening this V will be a challenge.
MT300 impressed me out of the box, even though tuning is nowhere as "audiophile precise" as FD5, - the stage is comparable in size. I would say MT300 is deeper, while FD5 is more airy and open.
FD5 has noticeable sub-bass roll-off, so bass-heads shall move on. At 20hour point FD5 is finally better than FD1, noticeably so, but value is questionable, as FH3 is still my favorite Fiio that doesn't have fuzzy DD treble and rolled of sub-bass.
BA treble is always an issue for me, but DD treble is usually worse and FD5 is not an exception. Will see if another 80 hours will change that.
MT300 treble is also problematic, but it has already improved in 2 hours, and if what one reviewer said, that in MT300 ABM is used for mids(BA is a super-twitter), then it needs a lot of burn-in time as well.
At the end of the day, literally, - I'm satisfied with both, but FD5 has potential for mods due to its removable nozzle, and it also serves as a lesson to stay away from this form-factor, so DUNU Zen is officially off my list. I'm not paying $700 to put tape on top of "fancy design".
The 2nd lesson is to keep an eye on upcoming Senxxx creations, as MT300 appears to be as innovative as Tri I3, while ergonomics and build quality is superior.