Adding Line Out / Sub Out to LG soundbar

[Ilkinandr92]

I have LG Soundbar with wireless sub. I am trying to add Line output, so i could connect a wired sub. I took some pictures of the boards and chips. If someone could point me in right direction on where to connect to get low level output. My second option is to add High to low converter but that doesn't always provide clean signal. ps9860 is Multi-channel Digital Audio Processor Eight-channels i think that should be where i could get a connection. If someone could confirm I'd appreciate it. I'm attaching link to folder with photos. Download files - Filemail

 

[MAAC0]

According to the datasheet these are PWM outputs. So digital. Perhaps You can get analog out after the Sub receiver.