IMO no speaker is EVER too big for a room. If it fits, and sounds OK to you, it's good. I had BIG speakers in an 11' by 11' room and was in nearfield heaven. So I can say it can be great.
I have the 803 matrix s2 and 801 matrix s3. Is the room for music only or a family room. Reason I ask - as long as then can be placed well into the room 5 - 6ft. and sitting nearfield as Elizabeth said.
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