[robusto400]

I now have everything in place for my new small HT and installers will be coming next week to add the last (4) atmos speakers I have bought (Def Tec 5.5r). However, I have to tell them where they are to be placed. Based on the Audio Advice online model, Dolby specs and the many YT videos from Home Theater Guru's I could not get them to be equally distanced (front to back) between the MLP. Therefore the best I could do (because of room layout) is approx 55 degrees and 3' 9" in front of the MLP and the rear atmos only 2' 6" behind the MLP (as far back as I can mount). All the speakers have a pivoting tweeter to assist in properly angling them to the listener. Therefore before we start cutting do any of you experts see any issues with this placement?
As always thanks much.

 

[Wardog555]

Are you not sitting forward enough to accommodate the 3' 9" rear atmos?
I'd accommodate the distance rather than restrict myself to go there.

Or you can look into wall mounting to reach the same angle as the front speaker.

Best of luck!

 

[robusto400]

Thanks. The sitting distance from the 75 inch TV screen is approx 10 ft and yes I originally thought I would just move up the one row 2 seat MLP to accommodate the Atmos placement being equal distance front and back but after everything was in place (I raised TV 5 inches from entertainment center to accommodate my center speaker underneath) moving forward a foot for viewing looks to be a little overwhelming at that close distance, neck ache my wife says :-( Because I have angled walls up to the actual ceiling wall placement is not an option.

 

[Harris Levinson]

there is a range that the atmos website provides. stay within that range and you will be fine. don't trry tp put more speakers into an area that doesn't accommodate it.

 

[rgrhorton]

I think you'll be fine. Calibration will help make up for the difference. In the end, I think most of us have compromises somewhere. I am sure you'll still very much enjoy it.

 

[Wardog555]

Why would you not wall mount if it's angled?
It doesn't matter if it's vertical or not.

Figure out where the angles hit in the room. If it's ceiling or wall it goes there. Make sure you stick to the guidelines as close as possible.

75 feet at 7 feet is only 42 degrees viewing angle. It's not overwhelming at all. Try watching content with black bars top and bottom. You will want a larger tv to accommodate for the black bars!

I'm only sitting 5 feet from a 65 inch and it's very immersive. Something you would say overwhelming.

Are you one of those people who sit in back row of regular cinema and has a phone like viewing experience rather than a immersive imax like experience?

I wish I could assist any further but I won't discuss any miss information that doesn't meet the guidelines.

Best of luck and hope you consider all possible opportunities rather than restricting yourself.

 

[robusto400]

Why would you not wall mount if it's angled?
It doesn't matter if it's vertical or not.

Figure out where the angles hit in the room. If it's ceiling or wall it goes there. Make sure you stick to the guidelines as close as possible.

75 feet at 7 feet is only 42 degrees viewing angle. It's not overwhelming at all. Try watching content with black bars top and bottom. You will want a larger tv to accommodate for the black bars!

I'm only sitting 5 feet from a 65 inch and it's very immersive. Something you would say overwhelming.

Are you one of those people who sit in back row of regular cinema and has a phone like viewing experience rather than a immersive imax like experience?

I wish I could assist any further but I won't discuss any miss information that doesn't meet the guidelines.

Best of luck and hope you consider all possible opportunities rather than restricting yourself.

Thanks for the comments. I never considered mounting on the angled ceiling because they would be firing across from each other as opposed to toward the MLP????
As to how close to sit, we were sitting at 8ft but after raising the TV 5 inches it feels like we are stretching our necks up for viewing but I will give it a try before I cut the ceiling.

 

[guitarjim]

@robusto400 Don't worry about it. Room correction is your friend. Let the AVR do its magic for you.

 

[robusto400]

Thanks for all the recommendations. One thing I have not been able to figure out though is how to measure the actual angle of the atmos height speaker from the MLP. I have a protractor I use for the base layer speaker angles but that doesn't work for the ceiling and my geometry and trig days are long gone!

 

[Jobio]

Thanks for all the recommendations. One thing I have not been able to figure out though is how to measure the actual angle of the atmos height speaker from the MLP. I have a protractor I use for the base layer speaker angles but that doesn't work for the ceiling and my geometry and trig days are long gone!

Right Triangle Calculator

Right triangle calculator to compute side length, angle, height, area, and perimeter of a right triangle given any 2 values. It gives the calculation steps.

www.calculator.net

 

[robusto400]

Right Triangle Calculator

Right triangle calculator to compute side length, angle, height, area, and perimeter of a right triangle given any 2 values. It gives the calculation steps.

www.calculator.net

Based on this my front Atmos is 50 degrees and back would be 60 degrees. Hopefully with pivoting tweeters and Audyssey room correction I will be ok. Thanks much for the calculator.

 

[lawdogx]

Thanks for all the recommendations. One thing I have not been able to figure out though is how to measure the actual angle of the atmos height speaker from the MLP. I have a protractor I use for the base layer speaker angles but that doesn't work for the ceiling and my geometry and trig days are long gone!

I’ve been using this one from Amazon:

 

[T1G8RS_FAN]

Based on this my front Atmos is 50 degrees and back would be 60 degrees. Hopefully with pivoting tweeters and Audyssey room correction I will be ok. Thanks much for the calculator.

That placement is around what I wound up with due to the ceiling joist placements I had to adjust for, so they were at 50 & 115, which was 5 degrees too far forward for the top fronts and 10 degrees for the top rears, but after moving my seating up roughly 6" it put me at 55 & 120. This is with 8' ceilings, so if yours is around the same height, you wouldn't have to move the seating very far at all to get centered.

 

[robusto400]

I’ve been using this one from Amazon:

View attachment 3421061

Thanks. I picked this one up at HD before they started cutting to make sure about my calculations. Worked great and confirmed my estimates using the right-angle calculator tool.