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Screen Size

post #1 of 19
5/12/08 at 10:01pm
Thread Starter 
My Ht is almost complete the Epson HC 720 should be here on Thursday. I will be sitting 11 feet away and I would like a 100" screen. Is this overdoing it? I would really like as big a screen as I can get but I don't know if this is to much for such a small room. What would be the perfect size for my 12X10 room. The throw distance is about 10.5 feet.

Thanks in advance for any info
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post #2 of 19
5/12/08 at 10:19pm
This is very much personal preference, but I'm going to be sitting ~11' from a 108" wide 2.35:1 screen.

-Ryan
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post #3 of 19
5/13/08 at 12:20am
I think general rule is sit no closer than 1.5 x screen width for a 720p projector.
100" screen is 7.25' wide x 1.5 = 10.88' so I think you are pretty right at 11'.

Craig.
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post #4 of 19
5/13/08 at 6:35am
It will depend to a degree on what aspect screen you are using, you can comfortably watch a 2.35 screen at 2 times HEIGHT the eye has les trouble with a wider screen than it does a taller one.
I have a 120" wide by 51" high SMX AT screen 2.35:1 in my theater and my seating is 9.5' eyes to screen first row and 12.5' second row I have an Optoma H77 which is a 720p projector and no one has had any problem with the picture or seating postion.

Once you get your projector set it up and project on the wall or a sheet or something to see how large a screen you can comfortably watch from your various seating positions.

If you haven't already check out the CIH Chat forum on here now before you are done with everything.
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post #5 of 19
5/13/08 at 6:10pm
Thread Starter 
Thanks everyone for all the info. I can't wait until I finally have this set up.
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post #6 of 19
5/14/08 at 3:56am
106" 16:9 here at about 8'........

No problemo.
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post #7 of 19
5/14/08 at 8:03am
100" screen from 11' should be no problem.

Having only 12" on either side of the screen for speakers is a problem

Sitting 11' back in a 12' long room is a problem.

Bryan
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post #8 of 19
5/14/08 at 9:55am
Quote:
Originally Posted by bpape View Post

100" screen from 11' should be no problem.

Having only 12" on either side of the screen for speakers is a problem

Sitting 11' back in a 12' long room is a problem.

Bryan

hate to threadjack, but just wondering if there is a remedy for this if close-proximity side walls are unavoidable. I assume thicker absorbtion panels on the walls?
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post #9 of 19
5/14/08 at 5:30pm
Thread Starter 
Quote:
Originally Posted by bpape View Post

100" screen from 11' should be no problem.

Having only 12" on either side of the screen for speakers is a problem

Sitting 11' back in a 12' long room is a problem.

Bryan

I think from eye to screen will be about 10.5 feet. My seating will be right up against the back wall, no recliners just sofa and ottoman. I may make the screen a little smaller to accommodate the front side speakers. The speakers are fairly small so I hope it will work out. I am also planning on installing the center speaker above the screen and pointing it down, is this a good idea?

Thanks again everyone for all the info.
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post #10 of 19
5/14/08 at 5:44pm
Quote:
Originally Posted by plasmawatcher3 View Post

I am also planning on installing the center speaker above the screen and pointing it down, is this a good idea?

This is exactly what I'm intending to do as I near the final stages of my HT. From what I've seen and heard, if you have the ability to angle the CC towards your audience, should work just fine.
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post #11 of 19
5/14/08 at 9:52pm
my room is 12'x15', 100" 16:9 screen, 10-11' viewing distance, very comfortable for either 16:9 (HDTV/DVD/Game) or 2.35:1 (Bluray) material. (BUT Cloverfield did make me wanna throw up tho!)

100" @ 10-11' away is perfectly fine imho. but as other said, sitting 1' away from the wall and speaker placement might be what you'll need to rethink/re-measure tho.
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post #12 of 19
5/15/08 at 7:25am
I guess my point was that IF you put the seating in the proper position acoustically, then address the appropriate screen size for that now reduced viewing distance, you won't HAVE only 12" on either side of the screen. You'll also have a better listening experience and a better, denser, brighter picture and spend less money doing so. You'll also get a much better surround experience by having some space behind you for the surround field to develop.

Bryan
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post #13 of 19
5/15/08 at 1:15pm
So, based upon his room size what distance would you recommend between the back wall and his primary listening position? For example if the seating resulted in a 8' viewing distance he would have 4' to the rear wall. Is that enough to create a realistic soundfield behind the viewer/listener? Should plasmawatcher3 aim to have the listening position equal distance to all speakers? If he uses the THX suggested horizontal viewing angle of 40 degrees a 16x9 screen would be about 70" wide or 80" diagonally for that 8' viewing distance. The maximum projector throw would be around 10'. I see a lot of posts with viewing angles that exceed 40 degrees and wondered how folks adapt to screens where you feel like you are at a tennis match. I guess this process is an iterative one with the goal of minimizing video and audio compromises.
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post #14 of 19
5/16/08 at 11:33am
Quote:
Originally Posted by wjr858 View Post

So, based upon his room size what distance would you recommend between the back wall and his primary listening position? For example if the seating resulted in a 8' viewing distance he would have 4' to the rear wall. Is that enough to create a realistic soundfield behind the viewer/listener? Should plasmawatcher3 aim to have the listening position equal distance to all speakers? If he uses the THX suggested horizontal viewing angle of 40 degrees a 16x9 screen would be about 70" wide or 80" diagonally for that 8' viewing distance. The maximum projector throw would be around 10'. I see a lot of posts with viewing angles that exceed 40 degrees and wondered how folks adapt to screens where you feel like you are at a tennis match. I guess this process is an iterative one with the goal of minimizing video and audio compromises.

I am at either 9.5' or 12.5' from a 120" wide x 51" high screen and there simply is no tennis match problem, plain and simple.
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post #15 of 19
5/16/08 at 12:02pm
Quote:
Originally Posted by McCall View Post

I am at either 9.5' or 12.5' from a 120" wide x 51" high screen and there simply is no tennis match problem, plain and simple.

Just to qualify McCall's answer - I think her screen is 2.35:1 and not a 16:9.

With a 120" wide, 16:9 screen the issue isn't the "tennis" factor, but the height for most people.

A 1:1 ratio when using a 2.35:1 screen is fine.

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post #16 of 19
5/16/08 at 3:42pm
Thanks for the real world experience McCall and Cathan plus the clarification that ratios (viewing angle) differ for 1.78 vs 2.35 ratio screens. I've read there are standards for the angle up and down but they never seemed to matter much. Sounds like they do when the horizontal viewing angles gets larger. Doing the math then the viewing angle for a 1:1 ratio yields a 53 degree viewing angle. If you use the THX 40 degree viewing angle the ration is 1:1.4. Is the THX standard for 16x9 only? I hope bpape can answer my question about surround speaker placement.
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post #17 of 19
5/16/08 at 5:07pm
Thread Starter 
Well they tried to deliver my projector yesterday but I wasn't home. Hopefully today I will finally have it.

I was setting up my surround sound and installed the front speakers around 8 inches from the wall. The back surround speakers are in the corners near the ceiling pointing down to where we will be sitting. I have to say it sounds very good. I can't hear any distortion, everything sounds very crisp and clear. The surround speakers are sounding better then I thought for being so close to the sitting area.

I really don't have any furniture in the room yet so I would think that it would only get better after the room is complete.

Anyway I would like to thank everyone for all the great advice and info.

Wow! the projector just showed up as I was typing, gotta go and set this baby up.
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post #18 of 19
5/16/08 at 11:58pm
Thread Starter 
I set up the Epson 720 and right out of the box it looks great. I ceiling mounted it and was able to get a 96 inch screen. The surround sound is working out really well in such a small room. Can't wait untill I can fine tune it.
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post #19 of 19
5/17/08 at 6:12am
Have fun with the new toys!
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