Greetings Vlad,
In my experience it is difficult to get decent bass in a small room with conventional speakers because the upper bass tends to be overpowering and the lower bass disappears. This is because the room isn't physically large enough for the low bass waves to form, and the room's bass resonant modes over-emphasize the upper bass. In addition, the close proximity of the walls tends to color the midrange and can confuse the imaging.
There is a Finnish company called Gradient that makes very intelligently designed full-range speakers that manage to avoid most of these problems. While you still won't get ultradeep bass in a small room, that which you do get will be extremely natural-sounding, to the point of being better defined than what you'd get from conventional speakers in a normal-sized room.
The speakers I'm talking about are the Revolutions. They use dipole bass loading which very significantly reduces the amount of energy put out into the room's bass resonant modes, and cardioid loading for the midbass driver which reduces the coloration from reflections off the wall behind the speaker. If I had to get by with a small room, this speaker would be my first choice. Its relative immunity to room-induced colorations means that it works well in pretty much any room. Disclaimer - I'm a Gradient dealer, not because that's the biggest money-making brand out there (ha!), but because I fell in love with them.
You can check out Gradient's Revolution page here: http://www.gradient.fi/En/Products/Revo/Revo1.htm
If you would like an in-depth description of why the Revolutions do what they do so well, send me an e-mail and I'll give it a shot.
Best wishes to you in your quest!
Duke