How big is too big for a screen? - Page 3 - Home Theater Forum and Systems - HomeTheaterShack.com

Old 08-15-13, 03:42 PM
Senior Shackster

Join Date: Aug 2013
Location: United States
Posts: 101
Re: How big is too big for a screen?

I think it depends on what that 135" measures. Since you talked about HDTV aspect ratio, I am going to assume that it is diagonal and that you are looking at a 118" x 66" image area. I'll preface my thoughts with the caveat that I designed my room around a 2.35 screen but was very concerned about how close I could comfortably get because my room was depth constrained. I will also say that everyone has a different limit on what is "too close".

According to THX, the maximum recommended horizontal viewing angle for HDTV aspect ratios is 40 degrees. For 2.35 source material, it is 50 degrees. For me on the width, based on empirical self-testing, I felt that a viewing angle of 50 degrees was the limit of where I wanted to be so that jived with THX's recommendation. On a 2.35 screen, that left me with a 22 degree vertical viewing angle which was likewise comfortable.

So for your HDTV screen, with a 118" wide image, you are looking at about 141" or just about 12' as the closest you'd want your eyeballs. That 118" wide screen image will leave you with a 66" image height and at that 141" distance about a 25 degree viewing angle which should be doable.

So I think that your guesstimate of 12-14 feet from the screen is spot on. You might even be able to go a touch larger on the screen (assuming adequate projector light) if you're leaning more towards the 14 ft. dimension rather than the 12 ft. dimension.

The next thing you have to figure out is how high to mount the screen!

Good luck with the project. A lot of the fun is in getting it "figured out".
RossoDiamante is offline

Old 02-22-14, 11:32 PM
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Join Date: Mar 2012
Location: northwest
Posts: 65
Re: How big is too big for a screen?

I have a 135 inch diag. 16:9 screen. My first row is 12 feet from the screen back row 17 feet and the bar seating behind that. It looks good at all rows. I've never had someone say it is too big.
qx56 is offline

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