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The NZ9's uncalibrated light output met the company's 3,000-lumen spec (I measured 3,069 lumens) and calibration lowered light output by about 20 percent, which is typical for JVC models I've tested in the past. But a concern I had—one originating from my experience reviewing the RS4500—was...
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“Given the current dearth of 8K content, I had no real way to test the new e-ShiftX system, so I reached out to test equipment manufacturer Murideo to borrow an 8K signal generator. The company loaned me its SIX-G 8K generator so I could put e-ShiftX to the test with full 8K-quality test patterns. The NZ9 breezed through the test patterns with crisp, clear representation and no discernable scaling or processing artifacts—a positive sign for the day when we might see consumer 8K content (likely a long time from now). But the real question remains: Does 8K offer any current benefit for home theater systems?
The answer is yes—and no. From a strict resolution standpoint, I find 4K to be more than enough for even the largest home theater screens (and to be honest, movie theater screens as well). Individual pixels in full 4K-resolution static test patterns are non-discernable at most seating distances. And when you add in the fact that the 4K movies and TV shows we watch on disc or via streaming fall short of the full resolution of a static 4K pattern due to losses from motion and video compression, it becomes clear that 8K doesn't seem necessary.
Where I do see the benefit is when any type of image processing such as scaling and enhancement is being applied. With 8K, these extra processes extend over far more pixels and as a result lack the immediate artifacts you may see at lower resolutions, 4K included. Viewing in 8K also helped with motion resolution. The image took on a quality that reminded me of frame interpolation, but without any of the annoying "soap opera effect" on camera motion and pans. I also noted a subtle increase in apparent depth, dimension, and detail on lots of material I regularly use for testing. So, while I was quite the skeptic about viewing standard HD and 4K content on an 8K display going into this review, the more I watched the more I liked it.
To cite two examples, EShiftX yielded an appreciable increase in image clarity on the Ultra HD Blu-ray of
Blade Runner 2049 and the 4K/HDR image montage on the
Spears & Munsil UHD HDR Benchmark disc. Other scenes I've used repeatedly for demos and testing showed marked improvement. The difference wasn't night and day, but it was visible.”