JVC RS4500 (native 4K laser projector)

[AVSMike]

RS4500

[AVSMike]

RS4500

[Dylan Seeger]

Excited to hear your thoughts, Mike! I wish I had the disposable income to join the club!

[AVSMike]

RS4500 mounted on ceiling.

[mark_h]

That is only a calibration issue, actually the RS600 will show better shadow detail when calibrated to to the same gamma with perfect brightness due to its far superior on/off contrast.

The shadow detail will be the same on both, but the higher contrast projector will look subjectively better due to deeper blacks.   Scemantics, I know, but just saying that both projectors are capable of showing the same video details, just differently.

[AVSMike]

Ran my unit for about 6.5 hours yesterday. Did two movies in HDR plus some SDR, so had laser in high power most of the time. Room stayed cool down where I was, but temperature did rise at the ceiling, enough to raise the fan speed higher than I liked. I cut in a return opening up near the ceiling and partially blocked the lower vent, forcing it to draw air from the ceiling. Placed a thermometer on top of the mount and turned on a movie with HDR, so projector is in high lamp. I also installed the diverter. Right now even in high, the projector is fine. If these measure keep the temperature down at the ceiling, I will not need to build a hush box. 

[Andreas21]

The shadow detail will be the same on both, but the higher contrast projector will look subjectively better due to deeper blacks.   Scemantics, I know, but just saying that both projectors are capable of showing the same video details, just differently.

It depends on how you see it, due to its far greater on/off contrast and also better ANSI contrast the RS600 will look far superior in very low APL scenes due to its far superior intrascene contrast. And it also depends on the gamma curve, the much higher on/off contrast of the RS600 will also make it look better with a 2.4 power law gamma. If it shows more detail can be discussed, but it will definitely look better in my eyes in low APL scenes.

[AVSMike]

I watched Revenant yesterday on the RS4500 in HDR. Nice dark movie, the image looked excellent. I was running in high lamp, manual iris at -8, dynamic dimming in mode 2, natural and HDR on. Did not have the DCI P3 filter in place.

[AVSMike]

A-lens installed and I attached the diverter.

[Tom Bley]

I watched Revenant yesterday on the RS4500 in HDR. Nice dark movie, the image looked excellent. I was running in high lamp, manual iris at -8, dynamic dimming in mode 2, natural and HDR on. Did not have the DCI P3 filter in place.

Sweet!  Congrats on the new toy, mike.  You watched in high lamp?    Is this your first laser projector?

[AVSMike]

Sweet!  Congrats on the new toy, mike.  You watched in high lamp?    Is this your first laser projector?

Yes in high power and yes to being first laser projector that I have owned. You need high power for HDR.

[Tom Bley]

Yes in high power and yes to being first laser projector that I have owned. You need high power for HDR.

High lamp sounded funny to me because it's laser.  Do they still call it low/high 'Lamp' in the menus?  I'm curious how many ft lamberts  you get on your screen with BD & UHD BD.  Enjoy! 

[AVSCraig]

High lamp sounded funny to me because it's laser.  Do they still call it low/high 'Lamp' in the menus?  I'm curious how many ft lamberts  you get on your screen with BD & UHD BD.  Enjoy! 

They call it LD Setting ( laser diode ) low / medium / high .

[AVSMike]

High lamp sounded funny to me because it's laser.  Do they still call it low/high 'Lamp' in the menus?  I'm curious how many ft lamberts  you get on your screen with BD & UHD BD.  Enjoy! 

I actually have not measured. I know what Kris was getting on his screen and used that as a guide to determine what brightness to set it to. Will adjust this weekend. For HDR, I thought I would need to run full out, but I am closing the manual iris to -5. HDR looks really good. Makes it hard to go back to BD.

[AVSCraig]

I actually have not measured. I know what Kris was getting on his screen and used that as a guide to determine what brightness to set it to. Will adjust this weekend. For HDR, I thought I would need to run full out, but I am closing the manual iris to -5. HDR looks really good. Makes it hard to go back to BD.

I don't know about that. Blu Rays look outstanding on this projector - especially at 20 foot lamberts ( in mid power ).