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I forgot to mention, Esoteric's distributor told me they never see this problem before. They said if this is the reading head's problem, it will unable to read disc at the beginning, but not suddenly stop and show "Disc Error". They suggest me to set the player to Factory Default, I have done this today but the problem still there.......
I play CD 4 times a week, each time 1 to 2 hours, then I will use my K1 as DAC to play music file with my Lumin streamer fro another 1 hour.
On the other hands, I clean my disc quite often (use Furutech CD cleaner spray). And remember I said in my post, I have some new CD just bought a few days but has same problem (I even clean it before play this).
And what about the tray cannot open? Does it related to the reading lens dirty or not?
Esoteric's distributor already collect my K1 and waiting for their inspection result. Mots likely I think need to replace a new lens or belt.
I never compare my X-03SE with my Grandioso K1 because I owned X-03SE long time ago ( 2010 to 2016). And I owned K-03X from 2016 to 2019. I can only tell you the difference is huge in my memory.
K-03X sounds much better than X-03SE. Compare to K-03X, X-03SE sounds more dry and hard. And K-03X sounds more silky, more texture and more transparency.
Grandioso K1 also sounds better than K-03X. If I can use quantitative to compare these 3 players, here is my number:
Supposed 100 is the highest score
Grandioso K1 = 100
K-03X = 80
X-03SE = 70
I can see Esoteric really improve their sound quality in each product's generation. But same as many Esoteric's user, one thing I don't like is they change new model very fast. For example: K-1Xs comes out in 2018, then they have a new model K-01XD comes out this year to replace K-01Xs,
BTW, if you want to buy Grandioso K1, K1X, K-01XS, K-01XD......, I will suggest to choose DSD in Up conversation setting, then select "On" in Digital filter setting during DSD playback. It sounds much better than the original input signal without upconversion in my opinion.
Here is a detailed review about Grandioso K1: