In this configuration, on this particular TV (thats what I included the model number in case it helps), there are no settings to keep either the TVs internal speakers nor the optical output to the sound plate active. no doubts of genuineness of product Over all I am super happy with this buy! I just wish there were a little more space between the levels so that my heels fit in better. I found this while looking for a replacement on Amazon. It has a nice taste and feels good. A thin pair of socks will fix that if it bothers me. 5/11. When you activate the noise canceling circuit, you definitely get that sense of sudden quiet a few seconds after you power it up. This is NOT that.