Having set up component stereo systems over the years, I have always been conscious about the frequency response/amperage for driving speakers - and no, I could not afford high-end systems (ex. McIntosh, etc.) when I did so.
Anyway, I just purchased these last night for our speakers. until I saw your question, for some odd reason I didn't even think of checking the specs. I was simply AMAZED by the sound that this inexpensive bar put out. The highs were crystal clear (you could hear the definition between instruments, and in some cases STRINGS on guitars! I could not only hear, but you could FEEL the bass. Obviously, the channel separation may not be as wide as a component system may offer, but there was enough that it made listening to music incredibly a pleasure!
Now...curiosity has got this cat... I've got to check the specs on my own!

I use it in Texas in a 110 volt outlet with no problems. It is connected to my APS back up power and surge protector and works perfectly

This is 120V, 60Hz.

There is no center channel as such. The remote has a surround sound adjustment that when turned all the way down renders the sound bar a center channel speaker. The sound bar has separate treble adjustment and has plenty of output. The bass, of course, is handled by the subwoofer and is independently adjustable. I am hearing impaired also and the system works fine for me.

As long as you have somewhere to put it a sound bar will work with ANY TV.

Yes you can.

Yes, as long as you have the correct digital or analog cables and the same input/output ports on your tv.

Absolutely! Television size is irrelevant.

Technically you can but this sound-bar is not petite so it's going to look a little strange that the sound bar is wider than the TV. Purely aesthetic though.

Yes, it doesn't matter the television size, you just need ample room to place the long sound bar underneath.

Yes you can especially if you put it up on a wall mount