Mar 3, 2019
Feb 26, 2019
Thank you for your post and welcome to the community. I'm sorry to hear that you are having this issue
I'm afraid there is no function to revert the systems firmware to a previous version.
As you have tried the Factory Reset for the system, this would normally resolve the issue. May I ask have you tried connecting an optical cable from the ST300 to your television to see if this stops the intermittent audio?
In relation to the popping noise from the Accoustimass Bass Module, we would advise to disconnect it from power for roughly 5 minutes and reconnect it. If this does not resolve this issue, I would suggest to try to connect a Accoustimas Bass Module cable to the ST300. If you require this, you can contact your local Customer Support Team who will be happy to provide this to you.
If you select this link - Contact Us, select your region ad scroll to the bottom of the page and select "contact us". This will provide you with their contact number.
If this helps, please let us know.
Leon_C - Community Support