A:AnswerHello! While the sound bar can certainly be wall mounted, it can as well be placed on a TV stand. Best Buy does offer a variety of sound bar wall mounts that can surely fit your needs. -John Insignia Support.
A:AnswerPossibly, the problem could be the internal speakers or it could be bigger issue. I would get a sound bar and if that doesn't fix the issue then it's a bigger issue.
A:AnswerThat is going to depend on how the center channel needs to be wired. If that channel can connect using a 3.5mm or red/white or digital optical, or some form of adapter to get to one of those connection types, then it would connect and only play the audio for the center channel.
A:AnswerUnfortunately, this is probably a non-answer. The answer probably depends on the TV and/or av equipment being used. Wireless headphones may get their signal when the sending portion of the headphones is connected to a TV headphone jack, audio composite connections or an optical audio out connection. With some TV's the sound is automatically muted when a headphone jack is inserted. The TV's I've had have had the ability to go to settings and choose the audio out option with the remote. Since the steps involved in doing this can change with each model of every brand of TV, you'll need to check your owner's manual for your TV's capabilities. Good luck.