Originally Posted by k3nnis
Is the black level of the rs46 as good as a Rs 400/420?
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I think it's more important to think about your screen size first.
On a small screen, say 90", I think the RS46 can clamp down to a lower black level than the RS400/420.
But on a larger screen, say 120"+, I think you should look at the RS400/420's as the larger the screen you go, the lower your black level will be, all things being equal. And at even larger sizes, your RS46 is gonna start getting dim as the lamp ages, though it might still pop well when new.
I was in the market for a JVC earlier this year. I have a very small screen, like 80" diagonal (small room). I was hoping for a B-stock X500/RS4910/RS49, but they were all gone. AVS was offering the RS400, but IMO that would be overkill for my 80" screen and unnecessarily raise my black level over my previous JVC choices (according to AVS member black level measures at the fully closed iris setting).
So I kept an eye on ebay for an X500/RS4910/RS49 and even RS46 (though I really wanted a dynamic iris). I was coming from a 7 year old Mits HC3800 DLP, so any of those JVC's would have been an upgrade. I even saved an ebay search for an RS57, which has the dual dynamic iris. I bid on a low hrs one and unexpectedly won it at the price point I set for the X500/RS4910 models.
The RS57 apparently has an even lower (slightly) black floor than the X500/Rs4910/RS49 and RS46 and I'm super stoked I got it. The RS57 doesn't have the firepower of an RS400, but for my 80" screen it was a perfect fit.
Just sharing my thoughts. Your mileage may vary.