I also posted this in the 1 A section, but could be of use of potential buyers of the 100AAP
I went to the mall the listen to it and the 100 aap, and comprae them with a mix of files, same with original FIIIO X3 and the ii.
My first impressions were confirmed. The 1 A, was musical, well balanced. Nothing was demanding more attention then other frequencies.
Bass was present, but natural and not too much, Mids, were singing, well present, vocals were a pleasure to listen to, and highs were pure, without demanding attention, when not needed to. Headphones were comfortable, could listen to it for hours, if the salesman let me.....
The 100 AAP, was another story. Yes, they were more lively. But again, I felt them out of Balance, even sounding not bad. I let it play too, vivid and warm recordings altered, as well from one player to another. High tones were for me way too present, making "Fleetwood Macs" "little lies" sound tiring, when it was much more musical, with the 1 A. Also warmer recordings, not made me tap my feet. Voices, were not so natural either, lacking "presence", meaning, they were not enough in front. The Bass sounded pleasant though, but I had the impression, that the 1 A, had more layers to it. I can understand people who like the 100AAP, but it is not my piece of cake. Also, being 55, the abundance of high notes should not bother me so much, as they say with age, you hear them less, but yet it did.
The 1 A shined with the FIIO X3 ii. I liked it less with my own headphones, here it becomes more musical. The original X3, I prefer with my Audio Technica AT ES 7, as it has a bit more upper mids, that makes it more vivid. But I thing the A1 could come closer to the truth.
Really nice how it is musical, not tiring, but not dull either, where the hig tones, shine, when they have to shine. If my AT break again, I could turn to them without any hesitation