Hi,

I have a few questions regarding the Fiio KA3 configurations in the Control App and is hoping to get an official response.
(I also can understand Chinese and I don't mind a Chinese response, but since this is an English forum I would prefer an English response (or both languages) so that other users experiencing the same inquiries as I have can get their issues resolved)

1. Inquiries about Impedence setting

Fiio's official description for the impedence settings are: "The output impedance setting can help match the amplifier with different headphones for better sound quality. When the headphone impedance is below 120ohm, select the low impedance output, otherwise select the high impedance output." The setting is on the app as shown below.

It has brought to my attention that a fellow user commented this:

The response above has not received an official reply, could Fiio confirm or deny the above statement? The Fiio description or the comment by Zmey69, which one is the correct one?

2. Lowpass filter options

There are seven lowpass filter options available for the KA3, I am new to DAC/AMPs so I am unable to uinderstand the options without description. The seven lowpass filter are as below.

At the chinese FAQ section (https://www.fiio.com/newsinfo/565297.html) and the forum (https://bbs.fiio.com/note/showNoteContent.do?id=202110281524461646528) It was mentioned that the lowpass filter will be explained in a future post, which is still not posted. The closest description I could find was the M17 FAQ (https://www.fiio.com/newsinfo/567020.html) as shown below.

Can we have descriptions for the lowpass filter for the KA3? As some option description are not present in the M17 FAQ. I believe that the BTR5 has more options than KA3 and they weren't properly described too, it would be great if the options are described so it is more friendly to people wanting to get into the audio hobby (like me).

I hope the inquiries above can be answered, thank you for reading this.

Regards.