Home Theatre Flooring Choices

Well a sub is going to resonate very nicely through dense material like concrete. That could be a plus but concrete is terrible for reflecting highs and causing feedback. I've done live sound in rooms with concrete walls and not much dampening material. It can be a nightmare of feedback and somewhat distorted sound backwash.

If you cover the walls a bit to keep the highs from reflecting off the walls you should be able to make it work alright.

Of course I'm the guy who hates concrete and loves carpet