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Marcel_D
Joined: 22 Sep 2007
Posts: 54
Location: Canada
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| Posted: Thu Nov 08, 2007 12:24 am Post subject: Putting a CRT PJ on the floor |
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Everyone seems to advise against putting a CRT projector on the floor rather then the ceiling. Just wondering why that is exactly. When I buy one it will most likely be placed in a coffee table designed to hide it because the ceilings in my basement are less than a foot taller than myself. I would also like to know how high could the screen be off the floor if I did that? Would it be possible build the coffee table with a slope at the bottom to angle the PJ and get the screen higher away from the floor?
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Zebu Fellenz
Joined: 21 Dec 2006
Posts: 2567
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| Posted: Thu Nov 08, 2007 12:48 am Post subject: |
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I think the biggest reason is that a mount on the ceiling opens up the best seating spot (right under the projector) also by hanging the projector it is protected from damage due to people, pets, and other "creatures" hitting it and scratching the lenses.
However you can still have a nice setup with the projector on the floor.
Here is an example (not my room):
http://www.moesrealm.com/hometheater/hometheater.html
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Bucketfoot
Joined: 17 Mar 2006
Posts: 698
Location: Centennial, CO
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| Posted: Thu Nov 08, 2007 12:52 am Post subject: |
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I had mine on the floor for almost the first year. I'm glad I did, as it was a lot easier to go through the learning process this way.
I've had it ceiling mounted for about a year now, and would not go back. First, the seating just works so much better and second, I don't have to worry about the kids running into it, people setting drinks on it, etc.
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robnec
Joined: 27 Apr 2006
Posts: 87
Location: NYC
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| Posted: Thu Nov 08, 2007 12:53 am Post subject: |
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Hello. I have a floor set for years and I am very happy with it. You could use higher gain screen and all benefits that come with it without hot spotting. Brgds, Robert.
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Thu Nov 08, 2007 1:27 am Post subject: |
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Hello
The screen can go higher if the projector tilts up but, at some point, you would run out of range on the keystone and top/bottom lens focus. Then you would have to decide to lean the top of the screen forward some.
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Zebu Fellenz
Joined: 21 Dec 2006
Posts: 2567
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| Posted: Thu Nov 08, 2007 2:17 am Post subject: |
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Here's another vote for keeping it on the floor (at least until you really understand setup)
I hung my Marquee about a week after I got it and it brought new meaning to focus being a pain in the neck
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drice1234
Joined: 07 Oct 2006
Posts: 1309
Location: Allen, Texas
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| Posted: Thu Nov 08, 2007 3:11 am Post subject: |
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I have mine setup on the floor due to having a high ceiling, the mount would have to hang down quite a bit. I made my own table for the pj. I had to elevate it some due to my screen being about 2 1/2 feet off of the floor. Here are some pics.
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JustGreg
Joined: 07 Mar 2006
Posts: 3098
Location: Kenosha, WI
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| Posted: Thu Nov 08, 2007 4:06 am Post subject: |
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| Tim in Phoenix wrote: | Hello
The screen can go higher if the projector tilts up but, at some point, you would run out of range on the keystone and top/bottom lens focus. Then you would have to decide to lean the top of the screen forward some. |
Beat me to it.  I had my 8500 on the floor for a year and although I agree it's the best configuration when learning, I had to do exactly as Tim said. Keystone was up in the high end and I had to tilt the top of the screen about 5 degrees or so.
I finally ceiling mounted but I screwed up and didn't plan for the occassional up and down for maintenance or upgrades...so no winch, cable, or whatever to get it down and up again. On the plus side, as has been said already, I feel like I got the room back. I'm not talking about square footage but.."THE" room. It just seemed to belong to the projector and not the people in the room. Seating had to be arranged around it instead of placement that would provide the best viewing experience for people.
Each to his own tho. I've seen some VERY nice theaters with a floor mounted pj. I personally just don't have a room big enough or I probably would have gone that route.
Greg
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Greg
"Is it ignorance or apathy? Hey, I don't know and I don't care!" --Jimmy Buffett
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WanMan
Joined: 19 Mar 2006
Posts: 10270
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| Posted: Thu Nov 08, 2007 10:35 am Post subject: |
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| drice1234 wrote: | I have mine setup on the floor due to having a high ceiling, the mount would have to hang down quite a bit. I made my own table for the pj. I had to elevate it some due to my screen being about 2 1/2 feet off of the floor. Here are some pics.
[/img] |
I've never heard of someone claiming their ceiling was too high to mount a projector. I mean, those unistruts and threaded rods can make almost any residential ceiling a breeze. I guess maybe if you were living in a loft with ceilings above, say, 15 feet or so, but anything seems manageable.
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drice1234
Joined: 07 Oct 2006
Posts: 1309
Location: Allen, Texas
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| Posted: Thu Nov 08, 2007 1:05 pm Post subject: |
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| Quote: | | I've never heard of someone claiming their ceiling was too high to mount a projector. |
I have a 15' vaulted ceiling in the room and just didn't think it would look attractive hanging down that far. I would have also had to get rid of the ceiling fan which I did not want to do. It really works out well having the pj table there for drinks, snacks and a place to put the remotes.
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Marcel_D
Joined: 22 Sep 2007
Posts: 54
Location: Canada
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| Posted: Fri Nov 09, 2007 3:23 am Post subject: |
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Thanks for all the replies.
I guess the biggest concern for me would be the amount of space it takes up and how you have to arrange your seating based on where the projector is located. Looking at these pictures though it shouldn't be much of a problem as it seems the projector ends up being placed where a regular table would be anyways. Lets just hope it works out that way.
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PJMoore
Joined: 05 Oct 2006
Posts: 99
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| Posted: Fri Nov 09, 2007 9:54 pm Post subject: Over and over |
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The most commonly posted reason seems to be a belief that the reflected light is somehow brighter at a seated position if the light originates from above. This erroneous belief comes from high school physics lessons about the angle of incidence and the angle of reflection. This only applies with high gains screens, however, since the diffuse nature of most screens means this concept does not apply. A more reasonable explanation has to do with the "ideal" seating position, which is based on an "optimal" visual width of the screen relative to the seating position. This number somehow manages to be just about where CRT projectors end up having to be located when the phosphors are maximized. So you have to sit to one side or behind the "best seat in the house". I beg to differ with this concept as well. If there were an "ideal" spot and if it were always on the centerline, then wouldn't everyone be wanting to sit there at the movie theater? I do not like sitting underneath a projector. I do not like having to worry that gravity is slowly and inevitably loosening the cards in my Marquee. I don't like working on my PJ upside down and backwards over my head (ouch!). I don't like the visual intrusion of a huge hush box on an 8 foot ceiling. Notice these are all "MY" dislikes, and not a statement of absolute fact to which all should adhere. Each of us should please ourselves, but since you asked for opinions, her's just one more.
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