Effect of High Ceiling on Acoustics

[Nolan B]

Subjects were removed last night a on a place my wife and I bought, so it looks like a move is coming. The new place has 18 foot ceilings in the room where the HT will go. The place was empty when we checked it out and I noticed a echo, but it wasnt too bad. I assume that will get rugs and furniture gets in.

What else should i look out for? Are bigger speakers likely needed?

[ClosetSciFiGeek]

I think you have hit it on the head. The room should be pretty live without anything on the floors(especially hardwood) and all that wall area(uncovered by anything put on the walls)will do the same. More power/bigger speakers may or may not be necessary. Depending on your system you may just have to turn that volume knob a little farther clockwise than usual. As long as your amp can deliver and your speakers can accept that much you might be fine. This is always a good excuse in a room of this size to inform your better half that you might need these to "Fill" such a large room:

http://www.zaphaudio.com/SB12.3/