Room Treatment: AR's Unspoken Category

[E-Stat]

As far as the angle goes, I thought I was following Cardas cube model which basically has the speakers pointed at the dome of the listener.

I'm not sure where you looked, but here is the document found on George Cardas' site:

Cardas Speaker setup

You'll note there is ZERO toe in as indicated by several drawings.

should I only concern myself with results from my listening seat, or from other points in the room as well?

Tonal balance will necessarily differ at various points in the room. You can rarely optimize them all! Another rule of thumb relates to optimum bass response. Typically, one finds nulls in the center of the room. Consequently, avoid placing your main seating area at the room's midpoint. Move closer to the speakers or further back. I optimized my listening position based on this fore-aft rule. Here again, the rule of thirds applies as well. I sit at approximately two-thirds of the room length.

One more question though, with the media racking. Should there not be symmetrical diffusion for the opposite side of the room? I was actually worried about this...

Not necessarily. Asymmetry can be a good thing.

BTW, I guess you didn't notice the plant in the photo. It was my nod to you since you seem to give props to your ficus a few times. I prefer the sonic abilities of a hibiscus myself.

Hibiscus, huh. LOL! The particular value of diffusing the first reflection points is helpful when speaker placement is on the short wall and they are relatively close to the wall. You want the first "bounce" from that side wall to be controlled. With your long wall placement, that really doesn't apply. Also, they need to be slightly forward of the speaker plane in order to work.

rw