ZenPhone 9 Headphone Jack Issues with IEMs

[azurenimbus]

Please tell us some basic information before asking for help:
Model Name: Zenfone9
Firmware Version: WW_32.2050.2050.29
Rooted or not: Not
Frequency of Occurrence: Frequently
APP Name & APP Version (If your issue relates to the app): N/A
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I bought this phone two days ago and specifically for the headphone jack too. Unfortunately, I've been having some issues with the audio. I hear a quiet but noticeable static clicking noise during quieter, less busy parts of music. It is most noticeable with solo instrument music. For example, if only single piano notes are played I can hear a static popping noise underlying those notes. The strange thing is that only the left channel is affected. I reproduced the issue with two different pairs of IEMs, my Moondrop Variations, and Fiio FH3s. This happens across any app that plays audio. The issue does not occur with AT-M50x over-the-ear headphones. In addition, I notice that audio playback occasionally completely stops for 2 seconds if I increase the volume with the volume rocker.

[azurenimbus]

After trying the Zenfone 9 and my headphones with an 80 ohm impedance adaptor, the problem becomes far less noticable. I can still hear some clicking noise if I listen hard enough though. I'm feeling quite disappointed with Zenfone 9's jack.

[ASUS_Bot]

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