Official JVC DLA-RS46 / DLA-X35 owners thread - Page 25 - AVS Forum
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post #721 of 2367 Old 04-16-2013, 07:58 AM
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Originally Posted by typ44q View Post

A difference because of the 4K eShift or from other factors?

I was mainly talking about the E-shift, but if you are going to get the projector calibrated, the full CMS is an advantage also.
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post #722 of 2367 Old 04-16-2013, 08:10 AM
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Originally Posted by AV Science Sales 5 View Post

I was mainly talking about the E-shift, but if you are going to get the projector calibrated, the full CMS is an advantage also.

Thanks Mike, I am still on the fence between the X35 and X55 and I keep telling myself that it's "only" and extra grand and that if I hold off a little longer on the purchase I could afford it... guess I still have some time to think about it.
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post #723 of 2367 Old 04-16-2013, 09:06 AM
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What about the 4810?
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post #724 of 2367 Old 04-16-2013, 09:59 AM
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X55 = RS48 = RS4810.

To the OP - don't forget that the X55/RS4810 also has 144-point zone fine convergence adjustments whereas the X35 only has a single global course adjustment. Zone adjustments can be useful in dealing with uneven convergence issues or CA that arises from lens shift.
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post #725 of 2367 Old 04-16-2013, 05:06 PM
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Originally Posted by AV Science Sales 5 View Post

I was mainly talking about the E-shift, but if you are going to get the projector calibrated, the full CMS is an advantage also.

Cool, thanks for the feedback.

What if one were to couple the X35 with a Darbee Darblet device?

Wonder if that would match the PQ of the X55 with 4K eshift-2?
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post #726 of 2367 Old 04-16-2013, 07:56 PM
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Originally Posted by Cayman46 View Post

Cool, thanks for the feedback.

What if one were to couple the X35 with a Darbee Darblet device?

Wonder if that would match the PQ of the X55 with 4K eshift-2?

No. While I think the Darbee is a good match with any projector, it does not make it look like 4K upconverted. I have been using a Darbee with a JVC for over a year.

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post #727 of 2367 Old 04-17-2013, 06:55 AM
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To understand why the Darbee works so well with e-shift, you need to understand one underlying basis of all of these tools/algorithms....They all rely on analysing the current frame and figuring out the cues (parts) in the frame that it processes and changes the pixel values for. No algorithm is perfect. With e-shift, it essentially is a form of edge and contrast enhancement. If the sliders are set too high it may over enhance a part of the image, too low and it may miss a part of the image it should enhance. Darbee is also a form of edge enhancement but to at least make it sound different or superior it is often spoken about as enhancing the depth of an image. In a sense, and to use the much abused term, it adds "pop". Whatever algorithm the JVC uses seems to benefit from the Darbee processing. It seems to enable the JVC to make a better judgement of the points in the frame it adds its own form of enhancement. There have been some concerns about e-shift 2 and that it seems to add more artifacts vs e-shift 1. From my own tests, it is more selective on which parts of the frame it modifies. By being more selective you can sometimes see some mottling at edge boundaries which looks unpleasant close-up but cannot really be seen from seated. I think what is missing here is a second round of processing which looks for the "stair-casing" type artifacts introduced by its own processing and smoothing them back out...a form of anti-aliasing if you like. Maybe we will see that in e-shift 3.

Darbee is great for any display device really.....it just seems to help out e-shift noticeably hence its specific claim to fame for those JVC projectors with e-shift.
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post #728 of 2367 Old 04-17-2013, 10:49 PM
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I am so excited to get my new RS4810 & Darbee hooked up & running in my new TR. I felt the difference in price was well worth it after learning how much more the RS4810 offered. biggrin.gif

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post #729 of 2367 Old 04-18-2013, 02:37 AM
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Thanks for the feedback. I'm leaning more towards the X55 now and possibly even adding a Darbee Darblet to it too!

Curious, can the X35/X55 light up a 140" cinemascope sceen OK in a completely darkened room @ 4.5m (14.86 ft) throw distance?

Or would it be better to go with a 130" scope screen?
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post #730 of 2367 Old 04-18-2013, 05:30 PM
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Just FYI I have a X55 up on this site for sale
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post #731 of 2367 Old 04-19-2013, 03:26 AM
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Am I correct that the X35 does not position in THE EXACT position I (custom) made with the lens setting? When switchingg between my two custom made lens positions it constantly is different by one cm approx.
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post #732 of 2367 Old 04-19-2013, 04:53 AM
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Quote:
Originally Posted by sanderdvd View Post

Am I correct that the X35 does not position in THE EXACT position I (custom) made with the lens setting? When switchingg between my two custom made lens positions it constantly is different by one cm approx.

This is true. It is not perfect. You need to set some overspill with the zoom so that you don't risk the picture not reaching the edges of the screen
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post #733 of 2367 Old 04-19-2013, 01:59 PM
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Question. Anyone know if the Panamorph AK8J mounting plate will fit the RS46?


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post #734 of 2367 Old 04-19-2013, 09:54 PM
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Quote:
Originally Posted by Cayman46 View Post

Thanks for the feedback. I'm leaning more towards the X55 now and possibly even adding a Darbee Darblet to it too!

Curious, can the X35/X55 light up a 140" cinemascope sceen OK in a completely darkened room @ 4.5m (14.86 ft) throw distance?

Or would it be better to go with a 130" scope screen?

I sure hope so! I have a 148" scope screen at a 1.5 gain. I'll know soon enough as I'm getting close to firing my new RS4810. biggrin.gif

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post #735 of 2367 Old 04-20-2013, 06:11 AM
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Originally Posted by dropzone7 View Post

Question. Anyone know if the Panamorph AK8J mounting plate will fit the RS46?

I have sent you an e-mail!


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post #736 of 2367 Old 04-20-2013, 09:09 AM
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Originally Posted by dropzone7 View Post

Question. Anyone know if the Panamorph AK8J mounting plate will fit the RS46?

Yes the AK8J plate fits the RS45.

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post #737 of 2367 Old 04-21-2013, 05:53 PM
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Quote:
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Yes the AK8J plate fits the RS45.

The 45 and 46?


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post #738 of 2367 Old 04-21-2013, 07:19 PM
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Quote:
Originally Posted by dropzone7 View Post

The 45 and 46?[/quote




Yes.

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post #739 of 2367 Old 04-29-2013, 01:18 AM
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How are these lamps holding????They are better than previous models?
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post #740 of 2367 Old 04-29-2013, 02:09 AM
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How are these lamps holding????They are better than previous models?

So far yes...but these are relatively new models. Nobody has cranked up 1000 hours on one yet. So nobody is going to be able to answer you definitively. All we know is that so far they seem better with nobody reporting significant dimming yet.
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post #741 of 2367 Old 04-29-2013, 08:33 AM
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I am pushing 600 hours on mine, so far, so good.

The more things change, the more they stay the same.

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post #742 of 2367 Old 04-29-2013, 08:35 AM
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How are these lamps holding????They are better than previous models?

These lamps have only been used for about 5 months. I will say this, we have not had a single lamp issue on any of the JVC projectors that we have sold. We started shipping early last December. Also many users have reported a very slow dimming rate for the new lamps. Both of these are very good signs and based on what I saw the last three years (within 5 months of release) I think lamp issue is no long a concern. Time will tell if I am correct.

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post #743 of 2367 Old 04-29-2013, 09:25 AM
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I am pushing 600 hours on mine, so far, so good.

That's a good amount of hours clocked up there! smile.gif

Do you actually have a light meter to track how your bulb is doing? If not, in perceptive terms, when you say, so far so good, do you mean you cannot detect any visible dimming yet? Great news if true.
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post #744 of 2367 Old 04-29-2013, 09:30 AM
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I have a light meter that no longer works lol. To my eyes there has been no noticable dimming. After RS40 onwership I'm reasonably sensitive to it now. The longest a bulb lasted in the RS40 was just over 700 hours, and that was the 1st bulb oddly enough. The only quirk mine has developed is a small high pitched whine on start up, which goes away right before the "D-ILLA" startup screen appears. smile.gif

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post #745 of 2367 Old 04-29-2013, 09:44 AM
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How are these lamps holding????They are better than previous models?

I'm at 220 hours now and only about 5% drop from new (and that's calibrated too). In fact sometimes if I have it on for 5-6 hours the output seems to go up a little bit more so it's virtually back up to my new reading.

I use a Tecpel 531 lux meter to check my output at the screen (facing the projector).

Zooming: Been there, done that, bought the lens...
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post #746 of 2367 Old 04-29-2013, 05:32 PM
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"new 3D firmware (V041) If the first 3 digits of the serial number of your device or 167xxxxx 157xxxxx begin with...."


So the JVC's DLA RS46 / X35 with serial # 177xxxxx will come with the new 3D firmware (V041) for fix the problem with the SWITCHER 3D for reduce 3D ghosting?
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post #747 of 2367 Old 04-30-2013, 01:20 AM
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Originally Posted by Kelvin1965S View Post

I'm at 220 hours now and only about 5% drop from new (and that's calibrated too). In fact sometimes if I have it on for 5-6 hours the output seems to go up a little bit more so it's virtually back up to my new reading.

I use a Tecpel 531 lux meter to check my output at the screen (facing the projector).

When you get a chance Kelvin, could you see what happens if you do the following?

1) Use low lamp for an hour to warm up and take a reading
2) Go to high bulb and leave it for 15 minutes
3) Go back to low lamp and take a reading
4) Wait 10 minutes and take a reading

I found after using high lamp and going back to low, that low lamp does not return to its previous output level. Over a period of 10 minutes or so it gradually returns although it often then seems to stay a tiny bit lower than prior.

Also, I found that if I play 3D material in high lamp for about 15-20 minutes and then go back to 2D and take a reading of max white (on the X75 this is colourspace off, high bulb, aperture 0) I can get the highest reading from the projector (just over 1200 lumens on my X75). I actually saw this with the X70 as well. I never understood why playing 3D seems to give you a high lumens output when you go back to 2D, but it shifts about 60-70 lumens doing this technique.
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post #748 of 2367 Old 04-30-2013, 08:17 AM
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Quote:
Originally Posted by JonStatt View Post

When you get a chance Kelvin, could you see what happens if you do the following?

1) Use low lamp for an hour to warm up and take a reading
2) Go to high bulb and leave it for 15 minutes
3) Go back to low lamp and take a reading
4) Wait 10 minutes and take a reading

I found after using high lamp and going back to low, that low lamp does not return to its previous output level. Over a period of 10 minutes or so it gradually returns although it often then seems to stay a tiny bit lower than prior.

Also, I found that if I play 3D material in high lamp for about 15-20 minutes and then go back to 2D and take a reading of max white (on the X75 this is colourspace off, high bulb, aperture 0) I can get the highest reading from the projector (just over 1200 lumens on my X75). I actually saw this with the X70 as well. I never understood why playing 3D seems to give you a high lumens output when you go back to 2D, but it shifts about 60-70 lumens doing this technique.

Thats quite bizarre bulb behaviour but funny thing is, I found this to be the same on my X90 - even though its the previous generation projector and bulb. No idea why this happens.
The other night I was experimenting with various screen sizes, apertures and lamp modes. I like to watch at 10fl or so but continually hear people on AVS preferring much higher. I found I could get as high as 40fl but too small a screen so I decided to settle on 26fl, 117" screen size and watched a couple of movies just to see what the talk was with this high brightness preference.

But while I was taking all my recordings, which I done 1st in low lamp and then all over again in high lamp - when I switched back to low lamp I was a little bit freaked out when I checked the readings in low lamp again. I sort of thought that it might be a little bit higher coming from high lamp but it was over 10% lower. I thought that my frequent use of high lamp was beginning to take its toll on the bulb but after about 15 mins, it got close to the original readings - but not quite. I was a little bit thankful it sort of came back but at the same time, I'm a little bit worried at why this happens.

I will often use low lamp for some things and high lamp for others so its disturbing me that this will in fact damage the lamp. I don't know what lamp I'm using - I would like it to be the 3 but in reality, its probably version 2. I lost my zero bulb notes but from 70 hrs to my now 170hrs its dropped 8%.

As a side note, I've been trying to create some formulas which show that when you zoom back, lux increase, fl increases and lumens decrease. Same for aperture, what effect each setting has on output and also variance between high and low lamp.

I haven't enough measurements taken to be sure yet so I'll need to do more but one thing I'm pretty confident is that on my PJ, moving from low lamp to high lamp increases light by 54.2%. This was taken from 16 measurements at various apertures and 2 screen sizes and all readings where between 53% and 55% if I exclude ony 2 extremes - one measurement of 51% and one of 56% which aren't too far off the mean average anyway.
I think I can hang my hat on that number. Just need to create something for aperture and zoom now....that'll be a little more difficult....its certainly not linear and early numbers are showing that there is about 1/4 of the zoom range where lumens hardly drop at all - thats how I found my 117" 26fl sweetspot. At 109" there was only a marginal change.
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post #749 of 2367 Old 04-30-2013, 09:06 AM
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SoupDragon,

All X30/70/90s in the UK shipped with rev 3 bulbs, but the early ones didn't have the extra cooling fin. So I am sure you have a rev 3.

As for the behavior mirroring the X75, then it implies its more about the voltage regulation circuitry than the bulb itself. I have been suspicious that was the case, but if two different bulb technologies are behaving identically then it must be the driving circuitry causing it.

I don't think its anything to be particularly concerned about as we have kind of disproved the bulb, and clearly the voltage regulator circuitry seems to come back to normal(ish) eventually, and certainly after a power off , cool down and then on again.
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post #750 of 2367 Old 05-01-2013, 02:16 PM
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I just received my DLA-RS46u two days ago from UPS ground delivery. I was surprised to see that lamp hours is starting out at 1 hour. Also, and more importantly, the lens shift control seems to have no effect on the image. I have a 90" screen at about 10 ft. I wonder if the lens is locked down for shipment or something like that? Any help would be appreciated. Just so you know, I first scanned all the posts on this thread for 'lens shift,' and did not find this issue.

Thanks,
John Woods
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