New HT build: 180" 1.5 gain screen, which projector (nx5,nx7,695es) - Page 2 - AVS Forum | Home Theater Discussions And Reviews
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post #31 of 39 Old 05-15-2019, 04:04 PM
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Originally Posted by tddk View Post
The lk990 though is getting dinged pretty hard for color accuracy in the other threads. Most of the data I read in that thread highlights issues with that projector in terms of accuracy, which as primarily movies, is something I care about.



I plan on using madvr for tone mapping, shouldn't that help improve the HDR performance?

I did some preliminary measurements last night and it’s not as bad as has been initially reported, at all.
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post #32 of 39 Old 05-15-2019, 04:57 PM
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Quote:
Originally Posted by tddk View Post
The lk990 though is getting dinged pretty hard for color accuracy in the other threads. Most of the data I read in that thread highlights issues with that projector in terms of accuracy, which as primarily movies, is something I care about.

I plan on using madvr for tone mapping, shouldn't that help improve the HDR performance?
You can't have it all unless you are willing to shell out BIG bucks

The LK990 is in your budget, and will light up your screen - while also supporting 4K HDR & 3D. There really isn't much else out there that compares. The color gamut isn't as wide as some of the less bright options, but that will be a whole lot less noticeable than a dark picture in HDR.

If you like the idea of 180" and don't want to spend a small fortune, the LK990 is bar none your best bet.
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post #33 of 39 Old 05-15-2019, 06:22 PM - Thread Starter
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Originally Posted by Ruined View Post
You can't have it all unless you are willing to shell out BIG bucks

The LK990 is in your budget, and will light up your screen - while also supporting 4K HDR & 3D. There really isn't much else out there that compares. The color gamut isn't as wide as some of the less bright options, but that will be a whole lot less noticeable than a dark picture in HDR.

If you like the idea of 180" and don't want to spend a small fortune, the LK990 is bar none your best bet.
Starting to see that as a lead option, just now debating if i should back off hdr until ceida this year to see what may come out
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post #34 of 39 Old 05-15-2019, 06:23 PM - Thread Starter
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I did some preliminary measurements last night and it’s not as bad as has been initially reported, at all.
good to hear, looking forward to seeing your data dave, appreciate the help as always!
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post #35 of 39 Old 05-16-2019, 06:36 AM
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Originally Posted by tddk View Post
Hi All,

I dont want to repeat too much in this forum, as this is mainly to get projector advice or potentially projector/screen advice.

A friend gave me his old Elite Screens ezFrame CineGray 5D 180". I have a 22x16 room with 12' ceiling (schematics can be seen in new build thread linked below).

I am debating which projector to get and am torn. I am hoping the 1.5x gain will assit with brightness given the screen size.

Between an Nx5, 695es, or lk990, which would be the best option.

Some friends are stating it may be necessary to ditch the screen and get a different one for 4k UHD at this time due to brightness.

I appreciate your input!

edit: added benq's to the list. Removed nx7, added lk990.

New build thread: https://www.avsforum.com/forum/19-de...icated-ht.html
I'm a big fan of JVC projectors especially for their black levels. But for your screen size, I'd be going LK970 or LK990. The contrast levels won't be nearly as good as what you get on JVC, but those JVC and that Sony (which is dimmer than JVC even) won't do the job of lighting that size screen at all. My friend has had an RS500 on his 186" screen and it was ok but not great. He just upgraded to an LK970 and is quite thrilled.

Based on the feedback between LK970 and LK990, it's not clear but the 970 may be a better deal if you can find one. Sounds like the 990 has some sort of "brilliant color" mode that can't be disabled without losing 60% of the rated lumens and the 970 does not have this problem.

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post #36 of 39 Old 05-16-2019, 09:54 AM
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FWIW as far as the math goes. An NX5 at close throw would produce 25fL (85nits) in high bulb mode on a 180" 16:9 1.5 gain screen.

After 30% bulb loss that would be down to 17.5fL (60nits).

This is based on 1600 lumens which is about what my NX5 did at close throw on my screen after calibration.

IMO this is more than enough as I run my NX5 on a 1.0 gain screen at 20fL (70nits) and find it plenty bright for SDR and HDR (with madVR).

But of course that is just my opinion. It's more than bright enough, but more brightness of course wouldn't be bad. But personally I could never deal with rainbow effect if that was the alternative.
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post #37 of 39 Old 05-16-2019, 10:08 AM
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Originally Posted by markmon1 View Post
I'm a big fan of JVC projectors especially for their black levels. But for your screen size, I'd be going LK970 or LK990. The contrast levels won't be nearly as good as what you get on JVC, but those JVC and that Sony (which is dimmer than JVC even) won't do the job of lighting that size screen at all. My friend has had an RS500 on his 186" screen and it was ok but not great. He just upgraded to an LK970 and is quite thrilled.



Based on the feedback between LK970 and LK990, it's not clear but the 970 may be a better deal if you can find one. Sounds like the 990 has some sort of "brilliant color" mode that can't be disabled without losing 60% of the rated lumens and the 970 does not have this problem.

This shouldn’t be an issue after taking some preliminary measurements with it on the other night. I’m sure this was also exaggerated by Javs’ meter’s inability to measure laser phosphor properly.
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post #38 of 39 Old 05-16-2019, 03:50 PM
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Quote:
Originally Posted by SirMaster View Post
FWIW as far as the math goes. An NX5 at close throw would produce 25fL (85nits) in high bulb mode on a 180" 16:9 1.5 gain screen.

After 30% bulb loss that would be down to 17.5fL (60nits).

This is based on 1600 lumens which is about what my NX5 did at close throw on my screen after calibration.

IMO this is more than enough as I run my NX5 on a 1.0 gain screen at 20fL (70nits) and find it plenty bright for SDR and HDR (with madVR).

But of course that is just my opinion. It's more than bright enough, but more brightness of course wouldn't be bad. But personally I could never deal with rainbow effect if that was the alternative.
It's still BARELY enough (borderline), will work ok in a batcave, but the question becomes how many hours will he put on it, and how often does someone want to change the bulb.
When you run a bulb in high, it will last about 1/4th to 1/6th as long in my experience (not 1/2 as long), but these JVC bulbs are supposedly pretty good so who knows.

Of course there is always the double stack option (though there are a lot of issues with it IMO, but it can be done).

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post #39 of 39 Old 05-16-2019, 07:54 PM
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I don’t think everyone should be short changing @DavidHir ’s suggestion of the new laser Epson light cannon too. I’d love to get hold of one to see what it can do.
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