JVC RS56 (X75) vs RS400 (X500) - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 14 Old 08-22-2017, 09:01 AM - Thread Starter
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JVC RS56 (X75) vs RS400 (X500)

Hi All:
Hope you guys can give me some thought. I'm currently using a JVC X75 (same as the RS56) and have no problem with it. It has been calibrated and has quite nice 1080P picture . I want to get my hand to 4K UHD, but don't want to spend too much money as 4K HDR is still a moving target and my end-goal is to get a laser PJ, when the price is right. The dilemma is that I can get a really good price for a used but like new RS400; however, I'm worry that the picture quality of the RS400 will not be as good as my X75. Base on the spec sheet, the RS400 only has 40K:1 native contrast ratio vs 90K:1 with the X75. Will the picture quality of the RS400 will be a step down from the X75? Also, from what I read, JVC has removed the ability to calibrate 12 points Gamma from the RS400 menu, will the calibration be harder to do? I currently do my own calibration using Chromapure + I3 Pro meter. Any help would be greatly appreciated!
Thanks,
BT
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post #2 of 14 Old 08-22-2017, 11:07 AM
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Quote:
Originally Posted by btran33 View Post
Hi All:
Hope you guys can give me some thought. I'm currently using a JVC X75 (same as the RS56) and have no problem with it. It has been calibrated and has quite nice 1080P picture . I want to get my hand to 4K UHD, but don't want to spend too much money as 4K HDR is still a moving target and my end-goal is to get a laser PJ, when the price is right. The dilemma is that I can get a really good price for a used but like new RS400; however, I'm worry that the picture quality of the RS400 will not be as good as my X75. Base on the spec sheet, the RS400 only has 40K:1 native contrast ratio vs 90K:1 with the X75. Will the picture quality of the RS400 will be a step down from the X75? Also, from what I read, JVC has removed the ability to calibrate 12 points Gamma from the RS400 menu, will the calibration be harder to do? I currently do my own calibration using Chromapure + I3 Pro meter. Any help would be greatly appreciated!
Thanks,
BT
Looking at Cine4home's contrast numbers on the X70, the iris is going to have to be mostly to fully closed to get see any real contrast difference compared to the RS400; but in doing that the X70 is going to give much too dim of an image in almost all set-ups so the 90,000:1 number in all reality means nothing; with 500-800 lumens on the X70, you're looking at around 30,000:1 native which is pretty close to the RS400 in many applications. I assume the X75 will be the same here. The RS400 is a much superior projector in every way and worth the upgrade for sure. You might also want to reach out to Mike Garrett as AV Science has some great deals on B Stock RS400s.
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post #3 of 14 Old 08-22-2017, 11:34 AM - Thread Starter
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Originally Posted by DavidHir View Post
Looking at Cine4home's contrast numbers on the X70, the iris is going to have to be mostly to fully closed to get see any real contrast difference compared to the RS400; but in doing that the X70 is going to give much too dim of an image in almost all set-ups so the 90,000:1 number in all reality means nothing; with 500-800 lumens on the X70, you're looking at around 30,000:1 native which is pretty close to the RS400 in many applications. I assume the X75 will be the same here. The RS400 is a much superior projector in every way and worth the upgrade for sure. You might also want to reach out to Mike Garrett as AV Science has some great deals on B Stock RS400s.
Thanks, David! The X75 (RS56) has newer bulb (DC?) compared to the problematic bulb from the X70/X90 model. This is the same bulb that used in the RS57/67 (X500/X700) model, a model before the RS400/500/600. Do you know if the calibration will be harder for the RS400, without the 12 points greyscale, gamma? One thing I'm really looking forward to have a laser PJ is that I don't have to redo the calibration every few hrs as I did now with the lamp base PJ, too much time wasting! I'll get a RS400 and report back!
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post #4 of 14 Old 08-22-2017, 11:37 AM
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Originally Posted by btran33 View Post
Thanks, David! The X75 (RS56) has newer bulb (DC?) compared to the problematic bulb from the X70/X90 model. This is the same bulb that used in the RS57/67 (X500/X700) model, a model before the RS400/500/600. Do you know if the calibration will be harder for the RS400, without the 12 points greyscale, gamma? One thing I'm really looking forward to have a laser PJ is that I don't have to redo the calibration every few hrs as I did now with the lamp base PJ, too much time wasting! I'll get a RS400 and report back!
The RS400 lamp is even superior and more stable. Autocal is your friend on the RS400 (along with some tweaking and the Arve tool for HDR). See the appropriate threads for those.
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post #5 of 14 Old 08-22-2017, 11:43 AM - Thread Starter
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Originally Posted by DavidHir View Post
The RS400 lamp is even superior and more stable. Autocal is your friend on the RS400 (along with some tweaking and the Arve tool for HDR). See the appropriate threads for those.
Great to know that! thanks,
BT
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post #6 of 14 Old 08-22-2017, 01:57 PM
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I have the rs520 and previously had the rs400. Previously, I owned the rs15, 35, 40, 48, 49, and 55. The 400 was the best of them besides the 520 that I currently own. With the DI activated, the CR is amazing and it's bright. You can close the iris to get close to 40K CR at 700 lumens on high and 450 on low. That's really good. Then, it can display uhd BD.
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post #7 of 14 Old 08-22-2017, 08:09 PM
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Quote:
Originally Posted by blee0120 View Post
I have the rs520 and previously had the rs400. Previously, I owned the rs15, 35, 40, 48, 49, and 55. The 400 was the best of them besides the 520 that I currently own. With the DI activated, the CR is amazing and it's bright. You can close the iris to get close to 40K CR at 700 lumens on high and 450 on low. That's really good. Then, it can display uhd BD.
How PQ different between RS 4910 and RS400 in 1080p bluray? thanks.
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post #8 of 14 Old 08-22-2017, 11:31 PM
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Originally Posted by khactuyen View Post
How PQ different between RS 4910 and RS400 in 1080p bluray? thanks.
I would give the edge to the 400. You just get a lot more. It's brighter and an excellent DI still. No 1080p blu ray will be lacking with either but the 400 is just a little better.
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post #9 of 14 Old 08-23-2017, 09:58 AM
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Originally Posted by blee0120 View Post
I would give the edge to the 400. You just get a lot more. It's brighter and an excellent DI still. No 1080p blu ray will be lacking with either but the 400 is just a little better.
I agree.
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post #10 of 14 Old 08-23-2017, 10:35 AM
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Originally Posted by khactuyen View Post
How PQ different between RS 4910 and RS400 in 1080p bluray? thanks.
I never had them side by side, but am certain the blacks are better on my X500 (RS4910) compared to an RS400 I once tried. However, I have a new lamp with the iris closed down quite a bit as I don't need a lot of brightness. Still, the RS400, overall, makes more sense for most people given its large brightness increase and better UHD compatibility.
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post #11 of 14 Old 08-23-2017, 10:54 AM
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Originally Posted by DavidHir View Post
I never had them side by side, but am certain the blacks are better on my X500 (RS4910) compared to an RS400 I once tried. However, I have a new lamp with the iris closed down quite a bit as I don't need a lot of brightness. Still, the RS400, overall, makes more sense for most people given its large brightness increase and better UHD compatibility.
It depends on iris location. If you can use the 4910 with iris closed most of the way, then 4910 will have higher contrast. If you use the 4910 with iris open several clicks, then 400 will have higher native contrast, once brightness matched. We are talking small differences here. But if you have adequate brightness with 4910 with iris mostly closed, the black floor will be higher on the RS400, because the RS400 can't go as dim as the 4910. But then again, the 4910 can't come close to competing against the 400 in the brightness department. A 400 can go nearly twice as bright calibrated compared to the 4910. And when you also consider the big advantage of the 400 with UHD BD, that is the route I would go.
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post #12 of 14 Old 08-23-2017, 11:39 AM
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Originally Posted by Mike Garrett View Post
It depends on iris location. If you can use the 4910 with iris closed most of the way, then 4910 will have higher contrast. If you use the 4910 with iris open several clicks, then 400 will have higher native contrast, once brightness matched. We are talking small differences here. But if you have adequate brightness with 4910 with iris mostly closed, the black floor will be higher on the RS400, because the RS400 can't go as dim as the 4910. But then again, the 4910 can't come close to competing against the 400 in the brightness department. A 400 can go nearly twice as bright calibrated compared to the 4910. And when you also consider the big advantage of the 400 with UHD BD, that is the route I would go.
I recall the RS400 being a light canon. Given how long the new lamps last and their stability, the most recent JVC series (RS400+) is the closest one can get to laser stability I imagine.

Here's a good Cine4home breakdown of two and their contrast ratios, lumens, and settings.

X500: http://www.cine4home.de/knowhow/Cine...X700_C4HEd.htm

X5000: http://cine4home.de/cine4home-edition-jvc-dla-x5000/
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post #13 of 14 Old 08-23-2017, 12:27 PM
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The 49 can give more contrast but it can be unusable contrast because you are getting much less lumens that will probably not be enough for a screen.
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post #14 of 14 Old 08-23-2017, 02:23 PM - Thread Starter
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Originally Posted by blee0120 View Post
The 49 can give more contrast but it can be unusable contrast because you are getting much less lumens that will probably not be enough for a screen.
Thanks, guys!
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