Could also be that the answer to your question is easily found in the LM3886 data sheet. Pins 9,10 are the inputs. Why would you ground them? Pin 11 is a No Connect pin. Don't mess with it. Pin 7 is clearly marked GND in the data sheet. Ground it!
You can find the LM3886 data sheet here: https://www.ti.com/lit/ds/symlink/lm3886.pdf The connection diagram is on page 2.
More details are available here: https://neurochrome.com/pages/grounding
Tom
You can find the LM3886 data sheet here: https://www.ti.com/lit/ds/symlink/lm3886.pdf The connection diagram is on page 2.
More details are available here: https://neurochrome.com/pages/grounding
Tom