Hello,
I am looking for the latest software/mcu update for my build, so that I can actually use my factory JBL subwoofer with the new head unit - I heard there is a software update that allows this. Please let me know if I am wrong or if I already have the latest update - build number and MCU version below.
Build Number
QCM6125 13 S10A_123 eng.hct.20260410. 140423 NA-V2. 1
MCU version
MTCHS_HA4Z_V4. 17f_1
Dec 23 2025 09:27:44
@Dylan s
Hello.
Please check the update tutorial below then give it a shot.
Update File:
System Firmware-G13-V2-20260617:
https://www.dropbox.com/scl/fi/lp15ox9naegc3ou9vcw6d/update.zip?rlkey=rjqbwyuds42ua0cf3qjztzv11&st=2mfaj06g&dl=0
MCU-4.17h:
https://www.dropbox.com/scl/fi/pt4jbm1nmeh1w7octd5an/hmcu.img?rlkey=uzkuhqaj20wrexuis49oyctgm&st=uq56dcqk&dl=0
Tips:
1.
Download above update file via your computer/laptop.
2.
Format USB drive to FAT32 Format.
3.
Copy the file “update.zip”&“hmcu.img” to the root directory of USB drive.
4.
Insert USB drive into the unit via USB cable;
then it will pop up automatically a window of update.
Alternatively, please manually go "Settings > System > System updates/MCU updates" to start the update.
***NOTE:
Please make sure that you have ticked option "Wipe data and format flash!".
Reference Operation Video:
https://www.dropbox.com/scl/fi/7tgvc28sn77ux6g6fmosm/MCU.mp4?rlkey=7p5940e12kb88a42zue6qntft&e=1&dl=0
After the update, please try to go Settings > Car > Car Amplifier to adjust and move the crosshair to see how it goes.
