"Brief test".. I think human perception is way too unreliable to compare devices honestly, that's why measurements are valuable.
On the other hand, I'm sure the iOne sounds fine.The iFi iDSD BL was also measured by audioscience and it measured very good, with superb amp performance (better than jotunheim!!)
so objectively, the much more expensive iDSD BL measures much better than the iOne. That makes sense, no?
Whether the difference in price is worth the better specs, or is worth the "audible gain", or if the iOne is better value, that is more prone to subjective reasons.
But to say you don't agree with the measurements, I think they are pretty faultless at just showing performance yes?
I do not agree with the conclusion that ione is not recommended as a DAC. I personally believe is a very good DAC at budget level which is my level.
I am not saying I disagree with his measurements which I do not understand and I do not want to understand anyway.
As a personal preference I do not care about the graphs and the numbers because as a consumer I trust my ears and my sences better.
I do not care about graphs and numbers personally for my audio hobby because I am doing a quite technical job where I am looking graphs and numbers all day so I do not want to do that for my hobby as well which is supposed to relax me instead and take me away from complex mathematical formulas and algorithms.
Moreover, exactly because of my background with graphs and quantifiable analysis I have a good feeling about the limitations of numbers and supposedly sophisticated analysis. Yes, in finance I need numbers and graphs because I have no other tools to understand and measure a situation. Almost Everything is about numbers and graphs.
But if I need to appreciate a good wine, a pretty woman or a good DAC ( in my price bracket) I can compare with and trust my tastes better. Obviously, I do not need a number or a supposedly objective scientific analysis to convince me otherwise. I leave that for the engineering department which surely needs a good analysis in order to design a product for me.
Audio Example: Archimago has a nice article where explains contrary to conventional audio wisdom that there is no problem with the usb output of the raspberry pi for audio purposes. The analysis is great, quite sophisticated and his evidence based on objectivity and not only.
Hans beekhuyzen from the other hand although he does some measurements for himself he says that always trust he ears better. He convinced me and I bought the Usbridge although I already had the raspberry pi.
The sound is much better so I cannot agree with Archimago at all no matter graphs he provide me. Is it 150£ better for the price difference I paid? A big discussion I do not want want to have it right now. But very noticeable difference in sound quality. Can I be wrong? Obviously, is my subjective opinion after all. Can I state a personal objection if someone claims that Usbridge is not good at all and not recommended to buy? I think yes! And without being obliged to provide an objective analysis.
I compared ione with es100 that I also have, dragonfly 1.2, nano black, xdsd and Marantz pm6005 internal DAC and where possible I used ipurifier to isolate the DAC comparison effect for my personal interest.
If there is a problem with ione never heard it 2 years now and always ione came on top, most of the times with a considerable margin. I personally believe is on par with xDSD in terms of sound quality if ione does not sound good then maybe xDSD is not good DAC afterall something that I really find hard to believe.
It striked me odd that someone could NOT recommend this as a DAC after so many good reviews and comments from other consumers.
I am offering my opinion not because it is important because it is not, but because I personally feel the recommendation was a bit unfair and may mislead some other consumers.