Design of wall mounted bipolar surround speakers?

[Whistler]

Please excuse my crude MSPaint drawing.
I'm looking to build two speakers to be used in the rear surround positions.
From what I've gathered it is a good thing to use the same drivers as in the fronts that I already have.

An externally hosted image should be here but it was not working when we last tested it.

Is this a suitable design to use for rear speakers with closed cabinets?
I'm looking for a fairly slim design because my sofa is all the way against the wall. I know direct speakers some way behind the sofa is better, but the room in question is lacking in areal, which is why I thought of the bidirectional/bipolar design.

Here is a sketch of the entire setup:

My left and right surround speakers are facing a bit forward on the drawing. I think they should be directed straight to the listeners ears.

All speakers use the SP165-KEP. (I'll look the name of the tweeter up tomorrow)

 

[Whistler]

My mistake, it is of course the SPH135-KEP.
The tweeter is the T-101SK.

 

[Whistler]

77 views but no opinions?

Can I use volume calculations based on a conventional rectangular cabinet with these drivers?

 

[blue934]

no, it is not important to match the surrounds with the rest of the system for HT. not much comes from them and it is generally effects. sacd or dvd-a might be different, but in that case i don't think an angled dipole is the way to reproduce music.
in rooms such as yours (and mine) were the seating is close to back/side walls, this in my opinion is the best solution A/V-1RS - A/V-1RS.
surrounds like at least 6'/2m from the listening position otherwise you hear the near speaker more prevelantly than the others (for example the illustration of your side surrounds). this design uses ceiling reflection to create that distance.

some other angled designs that i'm aware of (but i still wouldn't recommend them if you are seated directly next to or beneath)
suround speakers. - Techtalk at Parts-Express.com
Side and Rear Surround Build (3 way design) - AVS Forum
HTGuide Forum - A new surround TM - completing the HT

http://www.diyaudio.com/forums/attachment.php?attachmentid=189199&stc=1&d=1285387710
http://www.diyaudio.com/forums/attachment.php?attachmentid=189200&stc=1&d=1285387710

good luck
david