1. I use so far only for FM radio and music on cable TV. 2. The subwoofer, unless, of course, complete with a home theater, can be replaced by any active device with good bottoms and sufficient power. I have an old S70 active speaker. 3. Carefully understand the instructions (everything can be configured and adjusted) and the on-screen menu - you can work with it not only on the TV screen, but also on the display of the receiver itself. Output. Very pleased with the item. I recommend it to anyone who needs a good sound and an excellent set of consumer qualities without unnecessary bells and whistles for a minimal price. I sincerely wish everyone to get the same pleasure from the thing as I do.
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