It was a demo unit in a shop, so I don't know, but I think they had it for quite a while. I compared HD800, HE-6, LCD-2, LCD-3 and TH900. From brightest to darkest it was: HD800, HE-6, TH900, LCD-2, LCD-3. In other words: HD800 is WAY too bright (too much treble and too little bass), HE-6 has too much treble, TH900 is balanced, but with a V-shaped freq curve and a dry treble, LCD-2 has too little upper mids and treble, and LCD-3 has WAY too little upper mids and treble.
I didn't have the Miracle at that time, but in terms of frequency response it would probably be a clear winner in this high end full size company. By winner I mean having an almost flat frequency response. To me, Miracle has a slightly V-shaped frequency response, but when I say slightly here, I really mean slightly - like barely noticeable. Maybe it is only a slight (sub) bass boost. This however is when driven by Soloist, which has less than 1 Ohm output impedance. Using the HM-801 with GAME amp (having 32 Ohm output impedance), it has noticeably less bass and also a little more treble.
In other words, the sound signature / frequency response will be determined somewhat by the output impedance of the amp. This is allegedly because it is a multi BA IEM.
Interesting....I am listening to HD800's right now...(Latest purchase.. ) They are not bright. They are very clean. I am currently listening to Steely Dan's Jack of Speed in 24/192 FLAC they are VERY detailed. Terrific soundstage and a solid tight Bass line. High Hat and cymbals are crisp and clean.
Fun with audio is YMMV...Lovin' the HD800's here!