I just got time to play with my MH1C. I dont have much experience with other IEM's, not even a lot of regular headphones.
In last couple of months I got Sony MDR-XB500, and I dont like them, BASS is really good, but seems that interfere with mids, so with most of music I constantly hear some kind of humming in back, like all music sounds are duplicated triplicated and lowered in volume and put in background.
Then, I got Sennheiser HD428. I quite like them. Nice mids, solid highs, I can hear a lot of details, bass is right as I like, some say these headphones are bassless, but for me they are not, and even in time, bass become bolder and very very tight.
So I will compare Sony MH1C with Senn HD428, as its only reference I can rely on :)
First I did about 20 hours of Burn-In with Daft Punk's 'Tron Legacy - Reconfigured', looping it, just from time to time interrupted by my wife, as she constantly muted laptop volume as she said noises she hear makes her crazy lol.. oh well.
Then, I gave them quite a lot listening of different music, different genres, etc.
My setup that I used was/is Laptop -> FLAC -> FiiO E10 (low gain, amp 5 out of 8) -> Sony MH1C
First, I have to say that MH1C and HD428 need about the same amplification, and HD428 need more amplification than MDR-XB500, about 1 to 2 points on a scale to be on same volume level.
Also, with my HTC EVO phone, MH1C was obviously underpowered, as sound level at max was just ok for listening on medium loundness in quiet environment.
Compared to HD428, highs are better defined, less metallic, more fullmore sparkling, but a bit too sparkling for my taste, they can become bit harsh in some songs on higher volume, but not problem generally, as it is not all the time and probably depends on cd's post production, and probably AMP too? maybe E10 is too bright for MH1C?
Mids, to my opinion, are great. Full, lively, and very realistic, IMO. Both male and female vocals sound natural, just at times they can be a bit overlapped by instruments, i think. in 'Madonna - Frozen' I heard her voice is practicly trembling while singing, I didnt hear or noticed that before, and I listened that song a lot of times.
Amount of bass is, for my taste, bit higher, but very acceptable. Would be nice if bass is more precise, that is the only part where HD428 is better. Someone said that can feel vibrations of low bass, and that is really true! It happend that I felt those vibrations in ears, not even hearing bass!
That is it. MH1C is well worth of $27.9 I paid for them on Amazon, and I thinking buying another one just in case :)
And one question: Is anyone compared them to Fischer Audio DBA-02 / Brainwavz B2? And what are your conclusions? Brainwavz B2 are now $129.5 on Amazon so I thinking to make my Cyber Monday nicer if they worth of that :)