It takes some distance to the listener for the drivers in a speaker to blend properly. A 14x10 room is going to be difficult to set up without putting the speakers or chair back against the wall behind them and getting poorly balanced sound from the wall's reinforcement. A small speaker can work better because it doesn't need this 'distance' to blend.
Speakers "Too Big" for room
I have an office with KEF LS50 speakers. I’m gonna try to move in some large Infinity full-range speakers. Typically, conventional wisdom would say that these speakers are too big for the room. I’ll know for sure how they will sound but, why would anyone say that. Why can’t you put large speakers in a small room???