I mean K9 pro can save me some socket and you can plug PC and phone on the K9 pro, but there is EX5, Dx3 pro+ from topping, which cost a fraction of what K9 pro is.
I got my Sundara two days ago after I know it’s a lot cheaper to buy on Amazon. Still haven’t EQ the headphone yet but it’s quite amazing and enjoyable because of the open back feature. Despite the bass roll off pre EQ, the headphone is just amazing not just for its value but as a whole.
My unprofessional and uneducated guess about why they jump from K5 pro to K9 pro is:
They might have planned for K7 and K9 release after K5 pro in 2019, but then they have reset their whole development process because of product segregation issue. There could very well be a K7 in 2020, but COVID...
Decided to buy a pair of Sundara off Amazon, because the local shop is selling at 540 USD. I really love how Sundara sound "subjectively", I am a little worry about the QC but finger cross that it comes nice and perfectly to my ears.
It came out on head fi just now.
https://www.head-fi.org/threads/fiio-k9-pro-r-d-stories.960025/page-2
I don't know why it takes two years for them to launch their "high-end DAC Amp", but they could be resetting their development with K7 series and K9 Series, in additional to the pandemic, and...
Yes there isn’t 788+ in THX’s website, fiio claimed in the articles that Fiio have problems using 788 and they have to adjust 788 with THX and THX give the module name as 788+
Article:
https://forum.fiio.com/phoneNote/showNoteContent.do?id=202110061551401247839
one of the articles that they talk about THX AAA 788+ they said that 788+ increased the "continuous output power" from 0.8 per side in "balance output" from 788 to 2w combined in 788+
The article that I saw:
https://zhuanlan.zhihu.com/p/407912543
I saw listing in Hong Kong store and I am a little bit temped to buy it LMAO. The USB in seems fine and the AMP looks ok in Wolf prototype.
https://www.fiio.com/k9pro_parameters Also this listed some numbers but it's a little vague?
Honestly at this point, I rather wait for the ESS version reviews and measurement than rushing for the AKM version because there shouldn't be much of a difference between two.