speaker to big?

You could probably get away with a small floor standing speaker but it would be easier to get really good sound with a monitor where you don't end up fighting with the bass.

Panu21,

You should definitely work on acoustic treatments (broadband traps) for the bass and consider a Parc or Room EQ Wizard. Boomy room modes can really clutter up detail in the bass. A small monitor might indeed be better provided it is a sealed box and rolls off around 60 Hz...in some cases "less is more" as your ears can figure out the reduced bass frequencies from the higher harmonics anyway...whereas bass boom can disguise or hide detail.

In a room that size, you can get away with -3dB at 40Hz pretty easily - especially with some furniture and doorways in the room. There are many floorstanding options with this level of bass output. Your room is close to mine (14x13) and my speakers are 38Hz at -3dB but I have some bass traps in the corners and speaker placement was fairly critical. So anything with a little less bass than that should be fine for your situation.

Most monitors won't have this kind of extension so if you can live with less bass, then they are a fine alternative. I personally feel that solid bass extension is required for high fidelity, but to each his own.

Arthur

I had a pair of Gallo Ref 3.1's in my room, which is similar in size to yours. I could not get rid of boomy bass caused by standing waves. I sold them and bought a pair of Harbeth Compact 7ES-3's. These speakers integrate into my small room much easier than the Gallo's. YMMV...