150" AT screen 1.3g that compets with XD - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 14 Old 01-09-2020, 04:11 PM - Thread Starter
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150" AT screen 1.3g that compets with XD

looking to do AT 150" screen.

Something with a true 1 plus gain.
Seating 15-17 ft from screen.

Projector
5050
Jvc nx3
Ht5550
Open to options



Is HDR 100% needed
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post #2 of 14 Old 01-15-2020, 08:49 AM
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Severtson SAT-4K for woven- rated for 1.18 gain.
http://severtsonscreens.com/material/SAT4K/22
or
Stewart ST130 G4 for microperf.
https://www.stewartfilmscreen.com/en...udiotek-130-g4

Seymour XD is probably your next best option, but it's lower gain than the two above.

I'm debating Seymour XD vs. Svertson SAT-4K for mine. Planning 150" wide 16:9 screen with masking for CIA + IMAX. My last screen was a SeymourAV XD at 130" wide and 2.07:1 AR with CIA masking panels.

Tim
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post #3 of 14 Old 01-21-2020, 10:40 AM
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Quote:
Originally Posted by timgrady View Post
Severtson SAT-4K for woven- rated for 1.18 gain.
http://severtsonscreens.com/material/SAT4K/22
or
Stewart ST130 G4 for microperf.
https://www.stewartfilmscreen.com/en...udiotek-130-g4

Seymour XD is probably your next best option, but it's lower gain than the two above.

I'm debating Seymour XD vs. Svertson SAT-4K for mine. Planning 150" wide 16:9 screen with masking for CIA + IMAX. My last screen was a SeymourAV XD at 130" wide and 2.07:1 AR with CIA masking panels.

Tim
The Severtson SAT-4K, Screen Innovation's Gamma Maestro HD and Dragonfly/Snap AV whatever are the most inaccurate gain ratings for a white screens in the industry. It's because of them that we have to publish both unbenchmarked gain ratings (for calculations and actual science) and benchmarked gain ratings, where we roughly compare it with the basket of lying weasels out there.

Here is a picture of the SAT-4K next to the Stewart Studiotek 100. It's not color balanced, so don't judge the tones of either screen. This picture is just to show the obvious LOWER gain of the SAT-4K than the 1.0 gain Studiotek. In this rough comparison and controlled testing, I've found the ACTUAL gain of the SAT-4K to be 0.87, which is actually very good for a single-layer uncoated-thread woven screen. They didn't have to resort to the detail and contrast-blurring multiple layer trick, either. They should also know that gain isn't awesomeness and highlight that this screen reduces black levels by 13% and would offer a theoretical 25% reduction in room splash contamination resistance.

No woven screen can ever have that high a gain. For coated-thread woven screens we've maxed out the reflectivity in the Center Stage XD by increasing the retro-reflective powder in the pvc coating as high as it can go for both chemical and visual reasons, which is a patented formulation. If you must go higher gain than the XD, then the only options are coated films such as the microperfed Stewart materials.

Cheers,
Chris
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post #4 of 14 Old 01-22-2020, 10:49 AM
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Quote:
Originally Posted by chriscmore View Post
The Severtson SAT-4K, Screen Innovation's Gamma Maestro HD and Dragonfly/Snap AV whatever are the most inaccurate gain ratings for a white screens in the industry. It's because of them that we have to publish both unbenchmarked gain ratings (for calculations and actual science) and benchmarked gain ratings, where we roughly compare it with the basket of lying weasels out there.


Cheers,
Chris
Add projector contrast and sometimes lumen ratings to that.
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post #5 of 14 Old 01-23-2020, 02:47 PM
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i have a 155" 16:9 diy at-screen using white over black rosebrand spandex and i'm not happy with it. i can see the weave of the material and there are visual defects as well. i think i'm going to try spandexworld's 120" white material next.

here is the defect with the material. company would not do a refund because i had already cut the material. there are feint streaks in the top right corner of the screen that are highly visible in bright scenes.



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post #6 of 14 Old 01-23-2020, 03:16 PM
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I'd try posting about spandex in the diy screen sub-section. They are experts at spandex. Off of the top of my head other than a defect in the material is the possibility that it got stretched too tight somewhere along the line.
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post #7 of 14 Old 01-23-2020, 03:37 PM
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Quote:
Originally Posted by gil393 View Post
I'd try posting about spandex in the diy screen sub-section. They are experts at spandex. Off of the top of my head other than a defect in the material is the possibility that it got stretched too tight somewhere along the line.
this is my 3rd constructed spandex screen. the 60" wide matte milliskin material from spandexworld that everyone raves about was excellent and had no visual defects, however it could not stretch to 155" 16:9 (i was using with a 147" 2.39 scope setup prior). this material looked strange before i attached it to the frame and once on my suspicion was correct. with a flashlight you can see up close that the material is almost like stained or thinner in those streak areas. over-stretching is a different problem where you open up the weave and you end up with a sparkle effect. given rosebrands's reluctance to do anything to help me i'm going to try another vendor's material when i get around to it.
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post #8 of 14 Old 01-26-2020, 01:31 PM
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Quote:
Originally Posted by serith View Post
this is my 3rd constructed spandex screen. the 60" wide matte milliskin material from spandexworld that everyone raves about was excellent and had no visual defects, however it could not stretch to 155" 16:9 (i was using with a 147" 2.39 scope setup prior). this material looked strange before i attached it to the frame and once on my suspicion was correct. with a flashlight you can see up close that the material is almost like stained or thinner in those streak areas. over-stretching is a different problem where you open up the weave and you end up with a sparkle effect. given rosebrands's reluctance to do anything to help me i'm going to try another vendor's material when i get around to it.
I used the 120" spandexworld Milliskin to do a 200" 16:9. Worked great but not enough gain so I switched to XD.
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post #9 of 14 Old 01-26-2020, 01:36 PM
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Quote:
Originally Posted by gil393 View Post
I used the 120" spandexworld Milliskin to do a 200" 16:9. Worked great but not enough gain so I switched to XD.
i figure for $80 it's worth trying the 120" spandexworld material. just placed the order the other day, should have it tomorrow. will report back here or elsewhere how it differs from the rosebrand material.
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post #10 of 14 Old 01-28-2020, 10:57 PM
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for anyone that finds this thread and wonders how this all turned out...

i removed the rosebrand white spandex material that has caused me nothing but grief and installed the 120" wide white spandexworld material and the difference is hard to put into words. while the new material has almost no stretch when installed, visibly it's perfect and i couldn't be happier. my front row of seating from a 156" 16:9 screen @ 12' distance can not see the material weave/pattern, and there are no visible defects like before. best $80 i've spent in a long time!
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post #11 of 14 Old 01-28-2020, 11:11 PM
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Quote:
Originally Posted by serith View Post
for anyone that finds this thread and wonders how this all turned out...

i removed the rosebrand white spandex material that has caused me nothing but grief and installed the 120" wide white spandexworld material and the difference is hard to put into words. while the new material has almost no stretch when installed, visibly it's perfect and i couldn't be happier. my front row of seating from a 156" 16:9 screen @ 12' distance can not see the material weave/pattern, and there are no visible defects like before. best $80 i've spent in a long time!
Can't beat the price! Glad it worked out. Those defects on your previous material were bad

Ross
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post #12 of 14 Old 01-29-2020, 04:04 PM - Thread Starter
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Thanks for the feedback.
I am going to order a large sample of the XD.

is it true the XD screen is closer to .9 gain not 1.2 ?
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post #13 of 14 Old 01-29-2020, 06:41 PM
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Originally Posted by Schurter View Post
Thanks for the feedback.
I am going to order a large sample of the XD.

is it true the XD screen is closer to .9 gain not 1.2 ?
AccuCal measured the XD gain at .94

https://www.accucalav.com/wp-content...een_report.pdf

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post #14 of 14 Old 02-06-2020, 09:58 PM
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Originally Posted by Schurter View Post
Thanks for the feedback.
I am going to order a large sample of the XD.

is it true the XD screen is closer to .9 gain not 1.2 ?
Let me know how you like the XD . I’m about to build a new room. Currently I have an Elite screen 138 inch 2.35 AT screen. I’m actually perfectly happy with the screen. The new room I need to go a little bit bigger to fit my new speakers. Front row will be about 11 foot back and Im not sure that will be enough for a 144inch wide screen of XD. Then every one is also all about the spandex screens. I’m doing a DIY screen either way just going to order the material. I have a JVC RS620.
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