Not all, but some, where some Sony phones are included. The DAC come with Qualcomm SoC is capable of translate digital audio at the rate of 192kHz, and Qualcomm included a configuration that manufacturer can fix the audio sample rate at 192kHz.

Don't forget data connection, syncing, messaging, etc kills the battery

I'm glad they chose S650 over S8XX S8XX provides great performance but it eats a lot of battery (in general, not just S810) S650 is friendly to battery and provides enough speed for daily use As a dap, much battery is used to power the dac, amp and capacitors Choosing a battery friendly CPU...

If I understand correctly, One DAC is used for 3.5mm unbalance and 2.5mm in AGC mode (output power 75mW+75mW) Twin DAC are used only with 2.5mm balance mode (output power 150mW+150mW)   Seems some BA IEMs that do not require too much power perform better in AGC mode

Aircraft carrier? Does it mean the new X5 has flight mode? Interesting! (JKJK)

Blurred and unclear, far worse than it should be, you may refer to the review from soomal if you can read chinese   IM04 is known to have poor performance on player with high output impedance. and Vivo's Hi-Fi phones with standalone DAC AMP have output impedance up to 60ohms (they say this...

Some if not all Vivo's "HiFi" phones have high output impedance. This may cause some IEM to perform poorly. One example is ATH-IM04.

Do anyone do RMAA test of 300R (especially for balance output) Theoretically it shall do better DP-X1 because of the new PCB design

Sold my Z5 compact as I can't bear the hissing noise. Although it is a bit late, I would like to share my observation.   The noise is significant in high sensitivity headphones or balance armature headphones It is horrible with ATH-IM02, but can hardly be heard with IM50 or E40   The noise...