I have been using the X5 for about a month and a half and in general, I am very happy with the sound quality, and I find the ui to be pretty good and confident that any faults, and there are some, although minor, will be corrected. I am very confident in the attitude of James and Co. Their response to fans requests and reports are some of the best in this...or any business, I'm not kidding! For this I am extremely grateful.
The thing is though, I really would like to experience clearer high frequencies and much clearer louder passages. I listen to a lot of large orchestra performances in the classical medium and when the orchestra plays loud passages with the whole or nearly the whole orchestra involved, the sound invariably becomes muddy, unclear, somewhat fuzzy. Although, the X5 is better than any personal player I've owned or heard, still, the orchestral tuttis become somewhat "clashy" and instrument separation gets broken up.
Maybe it's the fault of the recording itself, maybe digital recording is not sampled high enough. I rarely hear those loud passages really done right. Even when I had very fancy tube equipment in the past with expensive turntable and speakers, I was not quite satisfied with the loud passages.
I have not fiddled with or tried to use the supplied equalizer b/c I would like to keep it all normal. to be honest, I'm not comfortable fooling around with it, but I could be convinced to do so as long as it's not too complicated, so if anyone has an idea.....
If someone here thinks I could solve this problem with the AK240 or the Wave or the upcoming X7, I'd love to hear from you, otherwise I will consider the problem as presently unsolvable. I'd like to report though, that after 40 hours of burn-in, it did sound much improved. I don't expect it do get any better, now that the electronics has had a chance to settle.
I don't wish, however, to give you the impression that I don't like the X5. I actually love it and aim to keep it for a while. It is really a superior personal player and really makes my music come alive. Just those loud passages.... damn.