DIY (cheap) AT screen UPDATED *Using Filmex*

Discussion in 'Projectors, Screens & Video Processors' started by True Romance, Oct 9, 2013.

  1. True Romance

    True Romance
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    *edit* now got this working a treat, see post 53.

    Well I think I'm going to try a cheap DIY spandex AT screen. As many on here will appreciate we all love to try and get our HC set up to the best we can achieve. So as part of this I want to get all my front speakers at the same hight. At the moment the centre channel is below the screen and below the front left and right speakers. So the plan is to make a very cheap AT screen so my front speakers can be placed behind the screen all at the same level. Lots of info on the USA forums about using spandex but very little over here so guessing not many have tried it? Anyway thought I'd start a thread with my findings as the project progresses. Going to make a timber frame that will probably end up in 2 or 3 sections and fixed together later as I won't get the timber in my car for the lengths I'll need. Then stretch the spandex over the screen using two layers, the first I'm going to to try black with a second layer of white over the top.

    Will update as things move along. If you have any hints/tips or questions fire away.


    P.S. many thanks to member nigel17 (who has made one of these spandex screen) for his help and information :smashin:
     
    Last edited: Jun 22, 2014
  2. kbfern

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    Neil shouldn't this be in the screen section mate.:)
     
  3. signs

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    what size are you going to make it ? :)
     
  4. True Romance

    True Romance
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    Think it will end up being just over 3m wide. It will have to be 2:35:1/2:40:1 only though as the spandex only comes in 1.5m widths so wouldn't be wide enough to make a 16:9 screen.
     
  5. nigel17

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    Neil

    If you PM me your address, I'll post you the 4m of black spandex I bought but didn't use. You'll only need to get the white spandex then - it'll make it a really cheap screen!

    Regards

    Nigel
     
  6. True Romance

    True Romance
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    Nigel that would have been very kind of you :thumbsup:, however I have already ordered and paid for the spandex :( Not to worry though as its still going to be a cheap project.
     
  7. jagdeepp

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    Chaps this spandex stuff is getting me more than just a little excited. I've got a 4 metre screen at present. Will look to build a frame and put my centre speaker behind the screen. Is it necessary to have 2 layers of spandex ? I'm seriously interested. Any idea of the screen gain? I'm thinking of trying out for a curved scope screen...... Just for fun!
     
    Last edited: Oct 11, 2013
  8. nigel17

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    Hi jagdeepp

    The recommendations on AVSForum is for 2 layers - the underneath layer is supposed to reflect back light. I don't know the gain, but I think it is below 1 as I compared it to my Carada 1.0 gain screen and it was slightly dimmer.
     
  9. jagdeepp

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    Cheers buddy.

    I have a Dulux painted wall that gives off a gain of around 1.4. The ScreenXD stuff gives a gain of around 1.2. The latter of course also has perforations in the fabric which may just about be visible in totally bright shots on a very large screen. I'd anticipate that Spandex wouldn't suffer moire as its not perforated.

    I presume you are using Grey and White? I wonder if white and white would produce a brighter image.. Did delivery come through to you in a few days? I may place an order actually. Just need for HSBC to authorise me a new card after my last was compromised. :mad:
     
  10. True Romance

    True Romance
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    Ok spent all day yesterday taking down the masking from my old screen (painted wall) and installing the spandex screen. The plan was to have the new spandex screen 20" away from the rear wall so I could then place the LCR speakers and my two subs behind the screen. So to start I had to make a frame so I could then fix the screen in place. Then it was a case of making the screen frame to stretch the spandex over, ended up making a 16:9 screen as the spandex does stretch along way :eek: I wanted a 2:35:1 screen but made it 16:9 then masked latter to convert into a 2:35:1 size. I used black spandex first then put a top layer of white spandex over the black. It looks move of a grey/sliver colour with the two layers. As this project is really more of a test than permanent the screen frame just hooks onto the supporting frame. Once the screen was in place I fired up the PJ to get the correct size for masking and fitted accordingly. It was the just a case of refitting the side curtains and any panels to hide the rear wall. Once all completed, tidied up, put everything back and re-run XT32 I could then see what the results were like.....


    First thing the sounds fantastic, may be the pseudo effect but having the front sound stage at the same height seems to improved things no end. Also with the two subs in the front corners I seem to be getting better bass.

    Ok onto the image, well its not good news :(. Dark scenes are very good with much better blacks/contrast than my painted wall however on bright shots (bright sky, etc) you can clearly see the spandex structure. Its difficult to explain so I'll try a get photo up later for you to see. This may well be down to the particular type of spandex I purchased however so I will be getting some other samples to try at some point.

    Overall I'd say it was worth the effort and time. Cost wise for the spandex and timber/screws it come to around £120 so not really expensive. Will stick with it for now and try to source some better spandex or start saving for a proper AT screen.

    [​IMG]

    [​IMG]
     
  11. True Romance

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    Sorry forgot to say the new spandex screen is 123" (3.13m) wide. The other thing to note is that the spandex does mark easily. I happened to catch it with a piece of timber and it sort of snagged it leaving a small mark :mad:


    [​IMG]
     
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    Last edited: Oct 13, 2013
  12. jagdeepp

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    Wow. Thanks for giving this a shot. I was looking to prepare a similar screen myself this weekend. May now give it a second thought.

    Can I firstly ask why white over black? That would sacrifice screen gain, something which isn't ideal given the size of the projected image. I'd have thought white over grey or white over white would be ideal for a bright screen.

    Also, in relation to the level of stretch, If over stretched wouldn't this make the spandex that much more transparent allowing the projected beam to just fire through the fabric rather than bounce off it? Guess you've got to do so to get a tight fit.

    The plus point I envisage from using spandex is the lack of moire as the fabric isn't perforated. However, if very stretchable this equally produces a number of negatives. I'm beginning to wonder whether the centre stage XD stuff is the only viable option.

    Look forward to seeing a few more pics.

    Can you see the timber structure through the Spandex?
     
  13. jagdeepp

    jagdeepp
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    Also, since you've already built the structure, you could just order the centre stage xd fabric through a dealer? Should cost under £300.

    If you are looking to order let me know, perhaps we could order together to reduce the customs and vat!
     
  14. True Romance

    True Romance
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    *Update* I sat down and watched two films yesterday and now I've gotten use to the screen I'm starting to think that may be I could live with it? Did try getting a shot with my camera phone but couldn't get it to show up the fabric effect, will have to dig my SLR out and try with that.

    Went with white over black as that seemed to be the recommendation over on the USA forums. You can't see any frame work behind the screen either with the Pj on or off. Even though my image is now over 3m wide its still plenty bright enough for me but I guess it depends on how bright you like your image.

    If I go with the XD screen think I would have it with the frame, not sure of the cost difference of buying the complete screen vs just the fabric?

    Anyway I'll try and get some screen shots up and see how I get on over the coming weeks. Will also keep an eye out for other types of spandex.

    Will say again I really am impressed with the front sound with all the speakers at the same height :smashin:
     
  15. jagdeepp

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    Adding the frame into the mix makes a significant difference in price. I was estimated around £300 for fabric for my 4 metre screen. That's fabric only. The frame work is to be DIY. If you're happy with the frame then the fabrics all that needs changing for yours. You'll then be looking out for perforation and moire in very bright scenes. Lol
     
  16. supahyp

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    Hi guys , . I'm going to be making a diy screen using some skirting board and 4 metres of some stretchy white fabric I got for 4 quid from a suit shop in Southall .If thats a bust I will be interested if you guys are going to buy a load of the good stuff .
    Great thread btw .
     
  17. True Romance

    True Romance
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    lol yes your probably right. Going up to Al's (ideal av) in a few weeks and think he has a XD screen on demo so can have a good look.
     
  18. soupdragon

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    I'm in :thumbsup:

    Lets get a group buy going :arty:
     
  19. jagdeepp

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    Rob Sinden utilises the centre stage xd fabric for all his screens at Gecko. Maybe worth speaking to him. I went across to see his screens not long ago but then got busy with other things av.

    I'd like to do a curved screen to maximise my anamorphic lens. Over in the US they use a splining tool and track to get a tight fit. Can't buy those here.

    I contacted Seymour av here in the uk and was quoted £7,000 for a curved screen. I think I'll pass on that one!

    Someone here needs to discover the perfect Spandex. Whaleys have been kept in funds for the Devore. Surely there must be a decent spandex out there which is perfectly AT.

    Supahyp, the £4 cloth sounds good but is it AT? Don't think the skirting board idea will work. Surely it'll now after a while.....

    Kudos to 'True Romance' for getting his butt in gear and starting off the quest for the perfect spandex!
     
  20. True Romance

    True Romance
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    Try as I may I just can't get the fabric effect to show up on photo's.


    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
  21. jagdeepp

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    Those screenshots actually look seriously impressive! Lol
     
  22. True Romance

    True Romance
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    And you wouldn't believe that there are three speakers and two subs behind the screen ;)


    Will try and take a video and see if that shows up the effect I'm seeing.
     
  23. jagdeepp

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    Now you're just showing off! Lol

    Think a video will do a better job of showing it up.
     
  24. signs

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    i could be interested in this :)
     
  25. True Romance

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    I'll have a word with Al when I pop up in a couple of weeks and see what he says or can do.
     
  26. soupdragon

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    I bought some of this:

    black fleece backed 100% cotton sweatshirt fabric material for hooded tops and hoodies

    The only reason was because it was the tallest I could find at 1.6m. There was some off white at 1.72m but went for the 1.6m white. Cotton/Lycra so should stretch to fit my current frame.
    Only £5.99m plus £4.50 postage so £20 odd quid for a little experiment. I'm just going to put it over my current matt white screen so that I can see the difference 'texture' wise and hopefully the brightness will remain the same. If all goes well, I'll buy a 2nd skin and have a look at how that goes.

    But yes, buying some proper material from US is probably the best way to go. We've got signs interested now which makes 4 of us so if we get a few more we might be able to buy a full roll of it :D

    By the way signs, I wanted to buy that JVC bulb but once I seen your name I had to refrain from offering - I couldn't have lived with my conscience after all, I do owe you one :D
     
  27. soupdragon

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    Forgot to say. Does it not make more sense to have 2 white skins and have everything behind the screen blacked out?
     
  28. signs

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    Lol , just hope I don't get stiffed :D
     
  29. True Romance

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    Well I tried to video the screen but just like the photo's I can't get the effect to show up :confused: If your in the midlands any time soon your more than welcome to pop in and see for yourself. I can only describe it as like your watching the film through a very thin pair of tights (not that I have a tendency to wear tights over my head for bank jobs or any other activities ;)). Will say that the more I watch the less I'm seeing the effect and seem to be getting accustom to the texture.
     
  30. signs

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    Your not that far from me , if you ever get this way on nip in and have a look at my 3mm foam screen and let me know how it compares to yours :)
     

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