The room based on the original dimension is 6.6 feet (2m) X 11.5 feet (3.5m). That is pretty small. While I think you could set up a small home cinema in that room, I'm not sure you can have two rows of seating. Taking some quick measurements of my sofa, I estimate you are going to need 4 feet (1.2m), plus an additional 3 feet (0.9m) for the next row. That place the front or near sofa 4.5 feet from the TV screen assuming the TV screen is wall mounted. Though your head would be more like 6 feet from the screen.
I've got a 36" TV, and 6 feet is workable but close. With a 40" to 42" TV, I'm guessing that would be your limit. Anything larger is going to be too large to comfortably view. But, in any case 6 feet is pretty close.
I think about the best you could do, is one love seat or two easy chairs, near the back of the room, and a small bookshelf to satellites speakers system.
Also, in that tight space, I think you are going to need to give some thought to acoustics. You are trying to squeeze a lot of sound into a small space, and I think that is going to be difficult without some type of sound absorbing material on the walls.
Keep in mind the walls don't have to be covered with sound absorbing material. A few sound absorbing panels place here and there should soften the room enough.
Things to consider -
- What are the floors? Hardwood? Rugs? Carpets? Tile?
The harder the floor surface the more reflective it is. At bare minimum, you want a good rug between the TV and the first seating position.
- What are the ceilings like? Plaster? Acoustical Tile? Textured?
Same as above, if the ceilings are hard and reflective, then you need to find a way to soften them.
- What are your walls like? Windows? Curtains? Other???
Again, it is about reflection, if you have windows in the room and the windows have reasonably heavy curtains on them, that both absorbs and diffuses sound, and that is to your advantage.
The back wall, that is the wall farthest from the TV is the most critical, and the largest bass waves are going to be reflected off of it. This is a good place to put a couple of convoluted (egg carton, pyramid, wedge) acoustical foam to both absorb and diffuse the reflected sound. Though simply putting some reasonably heavy curtains on the back wall would be a good step toward softening that wall, and could make the room look attractive, almost like being in a real theater. Though depending on the final system configuration, you could arrange bookshelf in front and satellite in the rear. That would likely be ideal
Next, in this small space, certainly satellite speakers with a modest Subwoofer would do a very good job. I would prefer small bookshelf, though the difference isn't that much in this space. I personally think that the bigger the speakers, the more air that is going to be moved, and as a result, the more attension is going to have to be paid to room acoustics.
Anything can be done, and every single home cinema room is a compromise. So, the remaining question is, how can you best make a home cinema system work in your limited space?
Also keep in mind that if you have a back row of seats, then it is most common for that back row to be elevated. How much is unclear, but it has to be enough that the people behind can see over the heads of the people in front. And that brings up the consideration of your ceiling height. You can probably just get by with 8 foot (2.5m) ceilings. Higher would be better though.
Oddly, all these considerations aren't unique to you. These are the same considerations that go into every dedicated home cinema room.
Next is budget. If you have give us a general idea of what you are thinking of for a budget for the AV amp and fulll 5.1 speakers that would help us focus more on potential solutions.
In general, the room is a little small for two row seating, and marginal for one row seating, but as I said, we all do what we can with what we have; ever home theater is compromised in some way.
Just a few thoughts.
Steve/bluewizard