Originally Posted by OzHDHT
I took the opportunity to send some feedback to JVC locally the other day. I essentially made mention of the issues discussed here to date, the contrast performance (both Native CR and on/off) along with inability to match motion sharpness (or lack of) vs RS600/620, the 40% light loss under P3 filter operation, laser dimming being inconsistent (mode 2 more problematic) especially when compared to the VW5000, and last but definitely not least operating fan noise levels… What came back from JVC was...
Originally Posted by Kris Deering
…Ekki's numbers seem to coincide with mine... I've said in the past that the noise levels will definitely be a subjective matter… but I definitely feel they need improvement... I am curious about the comments when it comes to the dynamic laser. It certainly isn't completely transparent in operation but… Definitely not as intrusive as dynamic iris systems I've seen… The BT.2020 filter is a shame though… It definitely takes a toll on the light output and makes it hard to have a bright image on a large screen… Things I'd like to see on its successor: quieter operation, higher native contrast, less light loss with filter, dual aperture system, more refinement in laser dimming, more light output. But with actual viewing of content it is really hard to find a lot of things to complain about. The image with both 1080p and 4K just looks fantastic.
Firstly, can everyone please kindly note that it’s not just us; and secondly, most importantly we all need to be making true apples-with-apples comparisions
Where, further to Ekki’s report don’t forget about Jetsen’s measurements with respect to TWO units, and Mark_H’s measurements with respect to his, all of which were circa 1,900 lumens with Rec.709 calibrated, but (as with our measurements) this includes brightness loss due to throw distances. Hence, factoring out said brightness loss this would put Jetsen x 2 and Mark_H all at circa 2,300 lumens, in addition to Ekki and Kris.
And just so we are all clear here with respect to what we ourselves are and/or are not in fact reporting, firstly with respect to the brightness and contrast performance figures specifically, when you convert our measurements such that they are a true apples-with-apples comparison they are in fact also essentially the same as Jetsen x 2, Mark_H, Ekki, and Kris; where when all things considered and accounted for are as per follows:
• Maximum Brightness = circa 2,300 Lumens (Rec.709) and 1,350 Lumens (DCI-P3)
• Minimum Native ON/OFF Contrast = 9,200:1
Further to this, this is what we have reported:
● Excellent out-of-the-box performance as compared with calibrated
● Razor sharp image due to superior lenses and associated hardware
● Superb colour performance and accuracy
● Laser dimming feature perceivably significantly enhances the contrast and black levels
● Initial firmware is very good indeed with comparatively very few issues, bugs, and/or malfunctions that need ironing out with subsequent firmware updates
● Disappointing ON/OFF Contrast that is less than forecast by JVC.
● Disappointing brightness output that is less than forecast by JVC.
● Laser dimming feature performance inconsistent and problematic (Mode 2 particularly).
● 40% reduction in brightness output with DCI-P3 colour filter.
● Prone to running hot and when it does the fans switch to 'turbo' mode and the operating noise hits the roof. MAXIMUM operating noise (when running hot): HIGH LASER [Max 70dB / 1m 63dB / 2m 56dB] | MEDIUM LASER [Max 63dB / 1m 57dB / 2m 54dB] | LOW LASER [Max 56dB / 1m 54dB / 2m 51dB]
Does anyone disagree specifically with any of what we are reporting here?
Everything else is moot. Where given this is the case, whilst we have a whole bucket load of further information including with respect to what may or may not have affected our readings, I haven’t posted it here given our findings are in fact not all things considered significantly different from everyone else. That said, the more accurate measurements of different units in different environments the better, so don’t be shy folks
And just to remind everyone (where I posted this ^^^^) we only posted our findings as an informal report and said that it would not be as professional as Kris' review but will hopefully provide some information and measurements to help fill the void whilst everyone is waiting for Kris' review (myself included!). So, given Kris will be shortly publishing his review (and Ekki has already posted his) it’s served its purpose in this regard. Kris do you have a confirmed precise publication date yet when you will be publishing your review? I think it's fair to say there's a significantly number of folk eagering awaiting it, myself included
For us and our particular clients the circa 1,350 Lumens with DCI-P3 colour is unfortunately and unavoidably ‘GAME OVER’ in itself, where whilst many others can settle for and be happy with Rec.709 we cannot. And then there's the circa 9,200:1 native ON/OFF contrast at peak brightness, which for us is a problem. But that’s just us and this is by not necessarily representative of what's typical with respect to the general population, plus as per usual personal preference is key
I have already posted more than once that with Rec.709 colour on a ‘sensible’ sized screen this projector yields a very nice looking image. And whilst its DCI brightness and contrast performance are less than forecast and promised by JVC this is not by any means a completely crap projector in all respects. We have recommended the best size of screen to be used with respect to this projector being 3.8 metres / 12.5 feet wide in order to yield 16fL in line with the THX recommended 14 - 16 fL, but as Gary Lightfoot has very astutely and correctly pointed out this is in fact the upper end of the recommended range and in fact 14 fL is what is recommended by the likes of SMPTE etc. and he’s right. Furthermore, in a totally blacked out environment you can achieve a great looking image on a larger screen with less lumens, as is demonstrated by Mark_H with his colossal 180” wide screen in his “CAVE”.