I'm one of the group of listeners who think that surround speakers are best mounted closer to the ceiling, rather than at ear height. By mounting the speaker closer to the ceiling (assuming we are not talking about large, floor-standing speakers), the bass response is enhanced (like putting speakers closer to room boundaries to increase bass). Further, being closer to the ceiling is more consistent with providing the "surround" dispersion you want in a home theater setup.
I have a pair of M&K SS-150 tripole surrounds, and they are mounted about one foot below the ceiling, but aimed downward toward the listening area. I arrived at this speaker positioning after a number of other placements, and think that it provides optimal surround.
If mounting the speaker directly against the wall does not provide good surround dispersion, you may want to try using wall brackets that allow the speaker to be angled downward.
I have a pair of M&K SS-150 tripole surrounds, and they are mounted about one foot below the ceiling, but aimed downward toward the listening area. I arrived at this speaker positioning after a number of other placements, and think that it provides optimal surround.
If mounting the speaker directly against the wall does not provide good surround dispersion, you may want to try using wall brackets that allow the speaker to be angled downward.