speakers in a bad room

Depending on your ceiling height you could actually have a wonderful room. Certainly 18 x 24 dimensions can accommodate all but a couple of the largest speakers out there. The concrete walls are a great asset and will help the bass and add solidity to the sound. Yes, your room is probably bright and reflective right now, but it could have a lot of potential. Its much easier to tame a hard room than try to bring life to a dead one. You'll certainly need room treatment and need to work with knowledgeable people on this. Pile thickness of a rug is very important for its acoustic benefits and character. The wall treatments should be chosen very carefully as well, many of commercial audiophile products do little to help with reflections and if anything do more harm with their coloration. If your ceiling height is 10' or more, you could have an amazing listening room.

Innersound speakers have a narrow radiation pattern which means less reflection off the walls.

This is the direction you need to take.

There may be other speakers that beam Quad ESL 57 maybe?

agree with Philjolet.. a dipole speaker might work better if you have to place on the short wall due to the figure 8 radiation pattern (output to the sides is cancelled...

that being said you can go planar or dipole dynamic(alon)

good luck,

mike

Herman...I guess that 18 X 24 is a good sized room, for anything except audio. A very popular feature of newly built houses is the "great room" often 30 X 40 or more, and with a high ceiling and irregular shape. This really makes for good audio. Old Colonial houses like mine often had small rooms, but walls get knocked down and several rooms made into one. That's how mine got to be about 26 X 34 which I still consider to be too small.

People who live in apartments or condos or developments where houses are close together are at a serious disadvantage. My closest neighbor is about 600 feet away with woods in between us. No problem when I crank it up!

The cellar that I mentioned as a good venue for jazz was about 25 X 50.

thanks for all the answers. about if it is a small or big room, it is more than double the size of what i have now.
the ceiling heights is exactly 10'.me and my wife live in denmark right now, but are moving to her country next year.the new house are ready, so i am making plans for bying new setup, because the one i have now is for 240v. so i am gonna start all over. i have aprox. 30000 us for the new setup.