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Official JVC DLA-RS46 / DLA-X35 owners thread - Page 50

post #1471 of 2110
Is there any decent 3rd party ceiling mount for the RS-46 which is cheaper than the Chief ones, SLB281 or RPA281 ?
post #1472 of 2110
Quote:
Originally Posted by ahmadka View Post

Is there any decent 3rd party ceiling mount for the RS-46 which is cheaper than the Chief ones, SLB281 or RPA281 ?
It'd suck to break a $3000 projector while trying to save $50 on a mount. Get the Chief mount meant for your projector, the steel is thicker and it's a better product.
Edited by Dreamliner - 11/26/13 at 12:58pm
post #1473 of 2110
Got another question .. which is kinda worrying me a little :/

On projectorcentral's website, there are calculators for RS-45, and for DLA-X35B & DLA-X35W ..

Even though both projectors are more or less the same, their characteristics seem to differ a LOT .. At a throw distance of 17 feet for projecting a 119" 16:9 screen, the RS-45 seems to want a higher gain screen, while DLA-X35 does not ..

So which characteristic is true here ? .. I was told here on the forums that for a 17 feet throw distance, a higher gain screen is normally recommendable .. Thus, I got a 1.3 gain screen, which seems to work well with the RS-45 calculator (right in the middle of green zone), but it does not work well with the X35 calculator (red zone completely)

So which is true here ?? ... frown.gif ....

Note that in the following pictures, 1.0 gain is used:

RS-45:



DLA-X35:

post #1474 of 2110
Quote:
Originally Posted by ahmadka View Post

Got another question .. which is kinda worrying me a little :/

On projectorcentral's website, there are calculators for RS-45, and for DLA-X35B & DLA-X35W ..

Even though both projectors are more or less the same, their characteristics seem to differ a LOT .. At a throw distance of 17 feet for projecting a 119" 16:9 screen, the RS-45 seems to want a higher gain screen, while DLA-X35 does not ..

So which characteristic is true here ? .. I was told here on the forums that for a 17 feet throw distance, a higher gain screen is normally recommendable .. Thus, I got a 1.3 gain screen, which seems to work well with the RS-45 calculator (right in the middle of green zone), but it does not work well with the X35 calculator (red zone completely)

So which is true here ?? ... frown.gif ....

Note that in the following pictures, 1.0 gain is used:

RS-45:



DLA-X35:


That is a reflection on the calculator, not the projector. In other words, I don't trust the lumen numbers and sometimes, not even the throw numbers given.
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post #1475 of 2110
Quote:
Originally Posted by AV Science Sales 5 View Post

That is a reflection on the calculator, not the projector. In other words, I don't trust the lumen numbers and sometimes, not even the throw numbers given.

So which of the two interpretations is more accurate/close ? I'm just scared that my HP Pro 1.3 gain screen might be too strong .. frown.gif
post #1476 of 2110
Quote:
Originally Posted by ahmadka View Post

So which of the two interpretations is more accurate/close ? I'm just scared that my HP Pro 1.3 gain screen might be too strong .. frown.gif

I have a 1.3 gain screen that is 108" in 16x9 mode and it looks fantastic. Don't worry. Also, buy from Mike.
post #1477 of 2110
Quote:
Originally Posted by ahmadka View Post

Is there any decent 3rd party ceiling mount for the RS-46 which is cheaper than the Chief ones, SLB281 or RPA281 ?
I use this Peerless mount and it works great. You'll just need slightly longer screws than those included -- you can get them at your local hardware store.

Peerless mounts are every bit the, uh, "peers" of Chief mounts so I wouldn't worry about their quality. Peerless also offers custom mount plates (as opposed to the universal "spider" mount) that can be used as well, but the spider mount looks damned near custom anyway.

I've used Peerless mounts with my Sony VPL-HS10, Sony VPL-VW60, and my current RS4810, and I've never had a single problem with any of them. I'll continue to use Peerless when my RS4910 arrives.
post #1478 of 2110
Can someone give me a confirmation on my math for the X35 and screen position to see if the lens shift is possible at this set up.

Ceiling height 8-feet (96 inches from floor). Ceiling mounted with center of lens at about 85-87" inches from floor. Throw distance is exactly 13-feet.

Screen is 115" 2.35:1 (45" height) with the bottom of screen at about 18-20" so top of screen is at about 63-65". That puts the screen about 10-14" below center of lens.

Is that going to work?
post #1479 of 2110
So which of those two calculators is correct guys ? I'm still wondering if the screen should be returned or something, if that's possible .. :/
post #1480 of 2110
I doubt very much that you will be unhappy because your image is too bright.
post #1481 of 2110
Quote:
Originally Posted by ahmadka View Post

Note that in the following pictures, 1.0 gain is used:

RS-45:

DLA-X35:

The X35 is the same projector as the RS46, not the RS45.

That said, the differences are minimal.

I have a 4810 which has a slightly lower lumens rating. My throw is 17' onto a 115" diagonal 16:9 screen. Screen is Seymour CenterStage XD material with a "marketing" gain of 1.3 (comparable to other screens rated 1.3 gain) and a measured gain closer to 1.1. I run in low lamp with iris at -8 to get close to the recommended 14 ftL, after calibration.

In other words, I don't think you'll have any problem with it being too bright.
post #1482 of 2110
The Calculator on Proctor central for x35 is not correct
post #1483 of 2110
Quote:
Originally Posted by Killroy View Post

Can someone give me a confirmation on my math for the X35 and screen position to see if the lens shift is possible at this set up.

Ceiling height 8-feet (96 inches from floor). Ceiling mounted with center of lens at about 85-87" inches from floor. Throw distance is exactly 13-feet.

Screen is 115" 2.35:1 (45" height) with the bottom of screen at about 18-20" so top of screen is at about 63-65". That puts the screen about 10-14" below center of lens.

Is that going to work?

A-lens or not? If not you should do the math for an imaginary screen that extends above and below where your 2.35 screen will be.
post #1484 of 2110
Quote:
Originally Posted by Killroy View Post

Can someone give me a confirmation on my math for the X35 and screen position to see if the lens shift is possible at this set up.

Ceiling height 8-feet (96 inches from floor). Ceiling mounted with center of lens at about 85-87" inches from floor. Throw distance is exactly 13-feet.

Screen is 115" 2.35:1 (45" height) with the bottom of screen at about 18-20" so top of screen is at about 63-65". That puts the screen about 10-14" below center of lens.

Is that going to work?

With that screen the projector has about 13" of vertical lens shift, if you do not use any horizontal lens shift. You do not want to use all of the lens shift, so I would not place the lens center 13" above the top of the image.
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post #1485 of 2110
Quote:
Originally Posted by Killroy View Post

Can someone give me a confirmation on my math for the X35 and screen position to see if the lens shift is possible at this set up.

Ceiling height 8-feet (96 inches from floor). Ceiling mounted with center of lens at about 85-87" inches from floor. Throw distance is exactly 13-feet.

Screen is 115" 2.35:1 (45" height) with the bottom of screen at about 18-20" so top of screen is at about 63-65". That puts the screen about 10-14" below center of lens.

Is that going to work?
Raise the screen or drop the projector. I vote to raise up the screen. It will allow you to place the center channel speaker higher, plus it's easier on the neck.
post #1486 of 2110
Quote:
Originally Posted by AV Science Sales 5 View Post

With that screen the projector has about 13" of vertical lens shift, if you do not use any horizontal lens shift. You do not want to use all of the lens shift, so I would not place the lens center 13" above the top of the image.

I don't follow. With no horizontal lens shift the JVC can do 80% vertical. That means the PJ can be up to 80% of the screen height above the center. I calculate:

Screen center is 42.5" from floor (assuming bottom is 20" up)
Screen height (16:9 equivalent) is 59.5"; 80% of that is 47.6"
So max PJ lens height is 90.1"

Which means he's got plenty of lens shift to work with here.
post #1487 of 2110
Quote:
Originally Posted by ScottJ View Post

A-lens or not? If not you should do the math for an imaginary screen that extends above and below where your 2.35 screen will be.

No A-lens. Zoom method only.

Quote:
Originally Posted by Dreamliner View Post

Raise the screen or drop the projector. I vote to raise up the screen. It will allow you to place the center channel speaker higher, plus it's easier on the neck.

The projector cannot be moved further down due to a door. I can move the screen further up if need be but those measurements were done with the current 16:9 screen so the scope screens could be a bit higher.

Quote:
Originally Posted by AV Science Sales 5 View Post

With that screen the projector has about 13" of vertical lens shift, if you do not use any horizontal lens shift. You do not want to use all of the lens shift, so I would not place the lens center 13" above the top of the image.

13" would be enough but since I can move the screen up I could. I just wanted to check the theoretical maximum of the lens shift capability.
post #1488 of 2110
Quote:
Originally Posted by Killroy View Post

No A-lens. Zoom method only.
The projector cannot be moved further down due to a door. I can move the screen further up if need be but those measurements were done with the current 16:9 screen so the scope screens could be a bit higher.
13" would be enough but since I can move the screen up I could. I just wanted to check the theoretical maximum of the lens shift capability.
Put the top of the scope screen at the top current 16:9. wink.gif
post #1489 of 2110
Quote:
Originally Posted by Killroy View Post

No A-lens. Zoom method only.

My above calculations were only for 2.35. If you want to be able to zoom for 16:9 we'll need to recheck things:

Screen center is 42.5" from floor (assuming bottom is 20" up)
Screen height is 45"; 80% of that is 36"
So max PJ lens height is 78.5"

Which means you will need to raise the screen.
post #1490 of 2110
Quote:
Originally Posted by ScottJ View Post

My above calculations were only for 2.35. If you want to be able to zoom for 16:9 we'll need to recheck things:

Screen center is 42.5" from floor (assuming bottom is 20" up)
Screen height is 45"; 80% of that is 36"
So max PJ lens height is 78.5"

Which means you will need to raise the screen.

I guess I will have to play with the scope screen and raise it slowly till I find a sweet spot.
Quote:
Originally Posted by Dreamliner View Post

Put the top of the scope screen at the top current 16:9. wink.gif

If the winky wasn't there I would almost think you were serious. The top of the current 106" feels likes its touching the ceiling as it is.
post #1491 of 2110
Quote:
Originally Posted by ahmadka View Post

@fierce_gt .. Thanks for the info mate .. I guess I have no choice then but to get that darn $100 emitter :/ ..

btw, you don't happen to be a Georgia Tech graduate by any chance, do you ? Because your alias is something a tech grad would pick easily cool.gif

haha, no. old handle from my first forum days on a car forum. i had a fiero(italian for 'proud' or 'fierce', i went with fierce) and it was a 'gt' model. it's just easier to keep the same user name for every forum i sign up on. sometimes i use them often, others i only signed up for to find help and leave when i no longer need help.
post #1492 of 2110
Quote:
Originally Posted by ahmadka View Post

Is there any decent 3rd party ceiling mount for the RS-46 which is cheaper than the Chief ones, SLB281 or RPA281 ?

i got one off monoprice. i had to use the extension arms from another mount i had for my old projector though, as they weren't long enough. but it's plenty sturdy. i'm sure if you hunt around a bit, just make sure to check the size and rated weight.
post #1493 of 2110
Quote:
Originally Posted by ahmadka View Post

Got another question .. which is kinda worrying me a little :/

On projectorcentral's website, there are calculators for RS-45, and for DLA-X35B & DLA-X35W ..

Even though both projectors are more or less the same, their characteristics seem to differ a LOT .. At a throw distance of 17 feet for projecting a 119" 16:9 screen, the RS-45 seems to want a higher gain screen, while DLA-X35 does not ..

So which characteristic is true here ? .. I was told here on the forums that for a 17 feet throw distance, a higher gain screen is normally recommendable .. Thus, I got a 1.3 gain screen, which seems to work well with the RS-45 calculator (right in the middle of green zone), but it does not work well with the X35 calculator (red zone completely)

So which is true here ?? ... frown.gif ....

Note that in the following pictures, 1.0 gain is used:

RS-45:



DLA-X35:

i do believe the new bulb maintains brightness longer, so maybe they are using an average, or mid life lumen rating. maybe it's just 'close' and we're seeing the amount of error in their guess.

in either event, nothing wrong with being in the red, i'm betting those guides are NOT set with the projector on its dimmest setting, they will be on the brightest. so in some ways, you almost want it to be in the red, to give you some headroom. with the jvc, you can reduce probably about 40% of the brightness by closing down the iris. and that extra brightness means as the bulb ages, you can slowly open the iris and get more life out of a bulb too.

i can tell you that i've tried my x35 on a 120" 1.0 gain white screen, with a throw of about 18' and it's WAY bright for me. i have mine with the iris fully closed, and i've thought about adding an ND filter on top. i think 'normal' ppl will be very satisfied with the projector's brightness in my room with the iris around -5. it feels brighter than my plasma(f8500) with the iris fully opened.
post #1494 of 2110
Quote:
I doubt very much that you will be unhappy because your image is too bright.

You are not going to have too bright a picture Ahmad. Worrying about a JVC projector being too bright on a 120" diagonal screen is like worrying that your girlfriend is too beautiful or that your too rich...........rolleyes.gif
post #1495 of 2110
Quote:
Originally Posted by fierce_gt View Post

i got one off monoprice. i had to use the extension arms from another mount i had for my old projector though, as they weren't long enough. but it's plenty sturdy. i'm sure if you hunt around a bit, just make sure to check the size and rated weight.

Those mounts are pretty flimsy compared to the Chief and they do not lock into place. My subs would move the projector around on one of those. I do run seven subs though. smile.gif
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post #1496 of 2110
Quote:
Originally Posted by AV Science Sales 5 View Post

Those mounts are pretty flimsy compared to the Chief and they do not lock into place. My subs would move the projector around on one of those. I do run seven subs though. smile.gif

you may be thinking of a different model than I have(or maybe you should try something before you decide). I did pull ups off mine, and everything does lock into place. unless you mean something different by 'lock into place' than tighten screws so nothing moves.

not really an argument about what's better, just stating that one I bought is certainly 'good enough'. I mean, what do you really need? something that can support the projector, and not move around. this does both. wasn't the most convenient thing to set up though I guess.
post #1497 of 2110
Quote:
Originally Posted by fierce_gt View Post

you may be thinking of a different model than I have(or maybe you should try something before you decide). I did pull ups off mine, and everything does lock into place. unless you mean something different by 'lock into place' than tighten screws so nothing moves.

not really an argument about what's better, just stating that one I bought is certainly 'good enough'. I mean, what do you really need? something that can support the projector, and not move around. this does both. wasn't the most convenient thing to set up though I guess.

Which mount are you referring to: http://www.monoprice.com/Search?keyword=projector+mount
I have not seen a mount that uses four arms to attach to the projector hold a projector rigidly.
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post #1498 of 2110
Quote:
Originally Posted by ahmadka View Post

Got another question .. which is kinda worrying me a little :/

On projectorcentral's website, there are calculators for RS-45, and for DLA-X35B & DLA-X35W ..

Even though both projectors are more or less the same, their characteristics seem to differ a LOT .. At a throw distance of 17 feet for projecting a 119" 16:9 screen, the RS-45 seems to want a higher gain screen, while DLA-X35 does not ..

So which characteristic is true here ? .. I was told here on the forums that for a 17 feet throw distance, a higher gain screen is normally recommendable .. Thus, I got a 1.3 gain screen, which seems to work well with the RS-45 calculator (right in the middle of green zone), but it does not work well with the X35 calculator (red zone completely)

So which is true here ?? ... frown.gif ....

Note that in the following pictures, 1.0 gain is used:

RS-45:



DLA-X35:



That stupid calculator caused me a lot of headaches mad.gif Look at the fine print next to "caution:" smile.gif
post #1499 of 2110
Quote:
Originally Posted by mijotter View Post

Are there IP codes in irule for the JVC RS46 does anyone know?


mijotter,

Yes, there are IP codes in iRule for this. Import the "JVC Projector RS and X Series All Models RS232/TCP" from the iRule tab. However, there are a few caveats to understand when working with IP and the JVC.

1. Their command list is incomplete. There are new commands available in the RS46 such as discreet lens memory select. Search this thread for my posts. I added the latest command spec from JVC.
2. The network stack must be "activated" with a PJREQ command within 3 secs of sending an actual command. You can do this by adding an entrance to any page sending the JVC commands or you can add the PJREQ+ to any button.
3. I have found that the networking stack in the JVC can get lost if the DHCP server goes down long enough. I am not sure the exact sequence and set of circumstances yet. Several times I have had to go in and change it from DHCP to fixed, save, fixed to DHCP, save in order to get it to reset. As a sanity check I have the JVC app on my phone. If that app can't see the projector then iRule will not either.

If you have questions you can post here or just PM me as many are probably not interested in this topic.

Best!
post #1500 of 2110
Anyone else has been trying out a PS4 on their RS46?

I've experienced no "lag", but what I have noticed is that the professional calibration settings for watching BluRay, etc seems VERY dark and flat for gaming. The settings that make my image look so wonderfully natural for video/BR, just seems to be lacking for graphics.

Was just wondering if anyone else has found some good alternate settings to switch over to when gaming versus BR?

Also, does anyone have suggestions on the best video output settings for the PS4? (yes, I did look over at the PS4 forum too)...

thanks!
Edited by petercw2 - 12/1/13 at 3:11pm
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