Originally Posted by Roger Dressler
As for speaker positions, I would suggest finding the ideal positions, then see if those work or conflict with the physical room.
Project the locations from the listener's head (reclining if that's the normal condition). From that position, find the compass headings for ±45° and ±135°. From each heading, look at an elevation of 45°. Put your laser pointer in a swivel-head tripod.
Can the speakers be mounted anywhere near those locations? If so, that's a good start.
As for aiming, I am of the school that speakers should aim at the listeners. In your case, if the dispersion is particularly wide, that reduces this concern. In addition, if there's only one listening position (??) then the off-axis issues of response or level rolloff are less of an issue, no one is there. And finally, the room EQ will help compensate for issues like off-axis rolloff and even some cavity resonance that is not tamed by stuffing absorption around the speaker's cabinet.
Hello Roger, Thanks for the response. Due to the 3 different intersecting flat angled planes of the ceiling, there is very few spaces where the speakers can be mounted up front. Last time I measured, I recall the available location was about 35 degrees from the listener’s reclined position. So about 10 degrees off/less than ideal, but the speakers are very high up and with a good tilt down, they may sound very good (I would think). They do need to be closer than the spec specifies though. Only about 4’ will separate the 2 Katherine cabinets that are installed on their side. I will map things out with the laser one more time before holes are cut into the ceiling, but again, that can only help so much due to the constraints of the room
As far as the rear Atmos speakers go, if I mounted them at the text book 145 degrees, they would be 1) too low due to the sloping downward ceiling and 2) getting too close to the back surrounds that are only a few feet away. Due to the sloped ceiling angle, the tweeters may be aimed too low if installed at the 145 degree location. This is why I was thinking of cheating them forward a bit, to about 130 degrees, which will get the speakers away from the back surrounds, make them higher up on the ceiling, and bring the tweeter trajectory towards the listener. I think if I move them further forward and more overhead, I may be getting too far out of spec.
There is only one large curved row of 4 chairs with wedges, so the chairs span across maybe 13’ or so. So there are 4 listening positions. So I was thinking of mounting them a bit further apart than the front Atmos speakers, which will help compensate for the narrower Atmos sound field up front.