As I also replied
here, I am really sorry, but I personally find the quality of this headfonia.com review really disappointing:
This weekend we take a detailed look at the KA5 on Headfonia, an article by
@nanotechnos
We're giving it our Recommended Buy Award!
https://www.headfonia.com/fiio-ka5-review/
• Not. A. Single. Word. About the supposedly outstanding feature in this price class (changing settings and filters via local OS, independent from the host device and without the need of an app)?
• You even state
„I’d have been really curious to try the other gain mode, but as for now, the app seems to be available on Android devices solely.” And you additionally repeat this in the pros-cons-list with
„Many software options [but] for android users only”.
What? Did you even use the FiiO KA5 yourself? Or is this so-called review all made up? All settings are supposed to be changeable directly on the device, without any app. And you are omitting/ignoring this the whole review all along?
Additionally:
• Why do you even state that there is no app for iOS, when FiiO, as well as a simple google search, both say that the FiiO Control app is also available for iOS?
• Why do you state that CS43198 in KA5 is higher end than CS43131 in
KA3 [edit: KA2], when in reality they are basically the same, except with integrated amp (CS43131) or without (CS43198).
• Why do you quote the output power as stated by FiiO, without mentioning that those values are measured at totally impractical THD+N<1%.
• Why do you not question FiiO's claim to achieve 768 kHz sampling rate, when the official datasheet of CS43198 states that CS43198 is only capable of 384 kHz? Did you test/verify this yourself? And if it really works, how is it achieved? By simply downsampling?