Finishing a basement and in need of advice - AVS Forum
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post #1 of 7 Old 03-20-2013, 09:02 AM - Thread Starter
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I have enjoyed all the information on this forum and find it extremely helpful but finding myself falling into being confused as I am guessing I am over thinking this too much. What I am doing is finishing my basement in my new house and want to know how big I can realistically get with the size I can project for my home theater. I have an older Sharp 1080i projector from about 10 years ago (maybe 9 or 8 years ago?) and in the older house I had a the screen roughly 6 feet tall (4:3). I am not as fortunate with the room I am now as it is much shorter. I am willing to upgrade the projector and get a motorized screen if it will help but want to know what I should expect the screen size to be able to go when the room is 14 foot long with 8 1/2 feet from floor to ceiling? What would be the ideal projector (3D would be nice but not a deal breaker) to reach that size? Thanks for any advice in advance!
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post #2 of 7 Old 03-20-2013, 10:41 AM
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THX recommends that you take the screen diagonal size and divide it by .84 for seating distance from screen. So if your screen is 100" diagonal, you should sit at least 119" back. That is a little too close for me though. I prefer 1.5x the screen diagonal. So for a 100" screen, I like to sit at least 150" from the screen.

http://www.thx.com/consumer/home-entertainment/home-theater/hdtv-set-up/
http://myhometheater.homestead.com/viewingdistancecalculator.html

As far as which projector goes, you may need to find one with lens shift due to your low ceiling. LCDs are typically more flexible when it comes to placement, but some of the DLPs are now coming with lens shift. I would suggest you read some of the threads on the different projectors until you find a couple that interests you based on your typical viewing habits. There are calculators you can use that will help determine if they will fit in your environment.

Here is a calculator that you can use as a starting point: http://www.projectorcentral.com/projection-calculator-pro.cfm
They're known to be off so I would do some additional research before purchasing to make sure it will indeed fit in your room.
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post #3 of 7 Old 03-20-2013, 10:52 AM - Thread Starter
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Fixed (math was wrong...)

It does - thank you! Just so I make sure I thinking correctly:

If I have 14' for the room, then I could go with a 144.8" by THX recommendations? 14 x 12 = 168 / 1.16 = 144.8 ?
So is there a HD projector that can throw up a image that big in that space? What would you recommend?
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post #4 of 7 Old 03-20-2013, 11:16 AM - Thread Starter
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Thank you again
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post #5 of 7 Old 03-21-2013, 11:59 AM
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Quote:
Originally Posted by Nazarac View Post

Fixed (math was wrong...)

It does - thank you! Just so I make sure I thinking correctly:

If I have 14' for the room, then I could go with a 144.8" by THX recommendations? 14 x 12 = 168 / 1.16 = 144.8 ?
So is there a HD projector that can throw up a image that big in that space? What would you recommend?

That will be a big screen for only 14'. Keep in mind that even though the room is 14', the space your furniture takes will cut that down at least a foot or two. You'll want to calculate your seating distance based on where your eyes will physically be in the room. So take everything into account such as furniture placement. I also recommend that you try out a screen that big and sit at that seating distance to see if you like it. Some may find that a screen that big at only 14' may cause excess eye movement which can cause headaches or nausea. Also keep in mind that you're going to need space on both sides of the screen for speakers. You don't want them too close to the side walls or it may affect the imaging of the sound. As far as projector recommendations, I'm not sure which projectors would be ideal for a 144" image at 14' and a low ceiling. I would visit projectorreviews.com or visit some of the individual projector threads. You will need a projector that can work with a low ceiling.

Another recommendation is to visit the home theater forum http://www.avsforum.com/f/3/home-entertainment-theater-builder . Some great stuff in there.
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post #6 of 7 Old 03-21-2013, 12:02 PM
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Quote:
Originally Posted by Nazarac View Post

Fixed (math was wrong...)

It does - thank you! Just so I make sure I thinking correctly:

If I have 14' for the room, then I could go with a 144.8" by THX recommendations? 14 x 12 = 168 / 1.16 = 144.8 ?
So is there a HD projector that can throw up a image that big in that space? What would you recommend?

One more thing, a 144" screen will require a screen that is 86" high. That only leaves about 18" of vertical space for a center channel speaker.

http://www.draperinc.com/projectionscreens/CustomSizeCalculator.asp
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post #7 of 7 Old 03-21-2013, 06:43 PM
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My 126" is only 18" above the floor, using 2,12" onkyo inwalls standing vertically, in a side by side setup, works pretty well. The center spot for your 144" will be a little higher which may be a concern if your sitting arrangement, is lower to the floor? A difference of about 5" compared to my 126". As to pj's, several can light up the screen enough, especially if you consider upping the gain to around 1.3 and run in 'em in higher lamp mode which can be noisy and reduce the lamp life some.

I like using http://www.eliteprojectorcalculator.com/ for comparing brightness etc. Plug in numbers for the Epson 5010 there, it's close to the current 5020/6020 which are a tad brighter, and see if you can find a size/gain that might work. 144" is just a little tough due to the limited ceiling height for that setup.
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