Exploring the problem of popping sounds

dudu-lai
so you are basically trying to control the powering of the oem amplifier using the C control cable. my CANBUS options do not show this power management control for the amplifier. see attached pictures. the hardware i am using is simple soft xp. I will have to take the headunit apart again to try this, please confirm . (side note , since i lasted posted , I updated the headunit to 3.5 beta 3. did not solve any of my issues. so i factory reverted back to 3.5 december release. so right now the unit is in clean state no mods.

Bradha333 Same issue with my subaru 2017, you have to keep the volume super low or your speakers start crackling, and they can get damaged. This is definitely an issue with double amplification. i have lowered the power output dudu7 amp is using but then then issue is the sound is too low. and some songs with different audio levels come at a ok level, others you cant hear and then you get one that blows your speakers. This also creates additional issues if you enable sound profiles. or have the road noise based audio correction features on. I think the answer here would be to be able to disable the Dudu7 internal amp. This is something i have done with other android based headunits in the past which has solve this issues, allowing you to still use equalization and pass the signal to the OEM harman kardon amplifier without pre amplification on it. but i have not found any way to disable the internal dudu7 amp. just lower its sound output which is still pre amped.
Maybe someone here knows if there is a way to disable the internal amplifier, and another benefit of that is lower temperatures on the dudu7 itself which is a plus.

dudu-lai Removing PIN9 stops the sound, but connecting it to the AMP C cable and updating the MCU does nothing.

dudu-lai Yes, but I put it back into the CANBUS harness because I needed sound.

I am using a DUDU7 head unit in a Mazda 6 GJ with BOSE amplifier. I experience a "click/pop" sound in the speakers (especially the center speaker) during device startup and reboot. This issue happens regardless of power or wiring configuration (AMP CTRL wire is stable at 11.2V). I have tried several grounding methods, RCA rewiring and filtering, but the click persists.

I saw on the DUDU forum that some users had similar problems and received a new MCU firmware version which helped eliminate the click/pop.
Could you please help me with that as well?

Here are my MCU/firmware details:

Let me know if you need any additional information. Thank you in advance!

McDudu
Thanks, I've tried messing with all of the EQ settings including power regulation which like you said only makes the volume too low. At this point this is basically unuseable at highway speeds in the Outback with the HK system. If they're unable to resolve this I'll just go back to my OEM headunit that actually sounded decent.

I think you're onto something though, one of the amps needs to be disabled somehow.

dudu-lai I think it would be easier having the software workaround with the AMP volume being set to 0 then reset when booted.

dudu-lai If you can get the current volume, couldn't it just do a minus until reaching 0 then plus until the previous volume?

Maybe it also would be great if the amp power would be turned off at reboot.
Press reboot, amp power 0, reboot, 5 seconds delay, rebooted.