JR, a little comment on your "generic question". No, the size of the room has no significance for the direct sound from a speaker; e.g. a speaker 5' away in your 13'x14' room wouldn't have direct sound any louder than if the same speaker was 5' away in that 60'x60' room. The difference lies in the indirect reverberent sound level which results from reflections. At typical listening distances in typical rooms the reverberent sound level actually accounts for a little over 50% of the sound reaching the listener, and the bigger rooms need more speaker output to create a given reverberent level than do smaller rooms. This was discussed here in some detail a while ago in the context of demonstrating why less amplifier power than sometimes stated was needed for a given sound level at the listening position after the reverberent sound is added in. So yes, the total sound level at the listening position would be lower in a bigger room if other things remained equal, but in rooms of typical size the effect isn't enormous.
