In Ceiling speakers - tips?

["Craig" <lists@xxxxxxxxxxxxxx>]

Im just about to fit some ceiling speakers in dining room during
decorating. I'm looking for tips, as it seems a bit experimental to get
the sound right, and I only have one shot at the placement, due to
access from above, new ceiling etc

I am probably going to fit the Sonance CR101, as they seem reasonable
price, and I could upgrade later.

>From what I have read in avrious instruction manuals, and ukha archive,
they should:

Not be on a center line of room
At least 2 feet away from walls
Different distance from each ajoining wall, in the corner
6-10 feet apart


Looking in the install guide for sonance:

"All Sonance speakers are designed to be relatively insensitive to
changes in enclosure volume. To achieve the ultimate performance
from the CR series speakers, a section of the ceiling bay can be
sectioned off to form a back box. Building this enclosure will create a
dramatic improvement in the quality of bass response and power
handling."


Is it the norm to build a 'back box'?

Any tips /do's /don'ts etc?

TIA

Craig