I agree totally to this. The highs are, what makes the Atlas simply better than the Vega. As I said in my review, I compare the Atlas's highs to the Andromeda 's.
If you have principles like having a flat frequency response, you won't sleep well, knowing you have the Atlas. But still. The Atlas extends incredibly well on all frequencys, like the Andromeda does.
Campfire Audio has quite fitting names for its Iems. The Andromeda is, like the galaxy seen through a telescope, flat(ish), very even with alot of tiny little details. This goes for the frequency response as well as for the soundstage.
The Atlas is a strong man, a titan. He packs a huge punch, but you will see/hear all the details as well with ease. The soundstage has more 3D to it, but to me, it seems also wider than the Vega.
I don't experience the Atlas as fatiguing, but he is very exiting and immersive. As for the music: I listen to all music genres. You might find the Atlas slightly over the top with tracks that have deep "spheric", boomy bass. Here the Atlas will be completely be unleashed and will let you tremble. With folk or classic you will not find many traces of this bass. Here the Atlas will act a little like the Andromeda, unless there are deep drums
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If I didn't know it better.. .. I would call the Atlas Androvega.