Cardas Speaker placement..

Spaz, if out of phase the one woofer goes out while the other woofer goes in, cancelling each other out, because both are supposed to go out at the same time (which increases sound pressure instead of equalizing it)

According to Jim Smith, the listening position, rather, than a speakers placement, has more profound effect on the bass perception.
I can concur his findings in my room.

My listening position is a little greater from the speakers then the speakers are apart .This seems to be the over all best position..but the bass is not there..

I found Jim Smith's book "Get Better Sound" the best source for the info on system set up.
I used to have the same "problem" with "no bass", until I followed his system.
The bass is always there, you just have "to find it"

Personally, I have never found the Cardas Golden Cuboid method to work well in any room I've tried it in; I actually prefer the Vandersteen placement method in most instances and it still falls woefully short in most cases. Each room is unique based on size and construction, and to properly understand what needs to be addressed, measurement is essential. I would recommend some recent Floyd E. Toole publications: the book 'Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms' is excellent, and dispels many myths about loudspeaker performance in rooms. For help with bass integration, I would recommend visiting the Harmon website, and looking for the whitepapers under the Technological Leadership section. There you will find an excellent three-part paper by Dr. Toole, discussing acoustical modes and their associated nulls and peaks. In my room, this paper was invaluable at optimizing the position of both myself and the speakers in my relatively new room. Be sure to download and use the room mode calculator as well. Good luck.