![]() 2,900 LED lumen, 1,200 ANSI lumen rating measured at 1,115 ANSI lumens.3840x2160 native (and maximum) resolution with 0.47-inch DLP XPR chip.Here's a more complete list of the ViewSonic X100-4K's key features: By default, the projector is set to check for updates when you turn it on and, if it finds one, ask if you want to update the firmware.Īlthough most people will want to connect to an external sound system, potentially using the 3.5mm stereo analog or S/PDIF optical outputs, the X100-4K includes an onboard set of 20-watt Harmon Kardon stereo speakers that can fill a large family room with good enough sound quality to be usable. Note that you can also connect to iOS or Android devices for screen mirroring and upgrade the firmware through over-the-air (OTA) updates. Unfortunately, there's no way to tell whether the repeated stops were due to the Aptoide apps or a bandwidth problem on my internet connection. YouTube 4K video seemed to display at the right resolution-and with nicely saturated, vibrant color-but repeatedly froze for something less than a second on camera pans. One hopeful sign is that in my tests, I was able to install the apps and navigate through them to pick video to watch 1080p content without any problems. It's not clear from my testing whether that's also true for the X100-4K, which I tested using YouTube and ABC streaming apps, but not with any 4K paid subscription apps. We've reported in other reviews that the Aptoide apps for the major streaming services are an insufficient replacement for those from a Roku, Amazon, or Apple 4K streaming media player. Either type of network connection lets you take advantage of voice control through Alexa or Google Assistant or stream shows from Netflix, YouTube and other sources using apps downloaded from the Aptoide Android-based app store. Other setup features worth highlighting include four HDMI 2.0b ports, the powered focus, and the ability to connect by wired network or by Wi-Fi, using the supplied Wi-Fi dongle. The horizontal shift was +/- 25% of the image width both in the spec sheet and my measurements. From that point I was able to shift it up by just a bit less than the 65% of the image height defined in the spec. With the projector sitting on a table, and the shift at its lowest point, the bottom of the image was below the centerline of the lens by roughly 55% of the image height. ![]() Its 1.2x manual zoom and both vertical and horizontal lens shift offer good flexibility for setting up on a table top, on a bookshelf in back of the seating area, or inverted in a ceiling mount. At 6.3 x 16.4 x 18.2 inches (HWD) and 16.9 pounds, the X100-4K is one of the few LED projectors designed for permanent home theater installation. At a measured 1,069 ANSI lumens in Movie mode after calibration, the image on my 90-inch diagonal, 1.0-gain white screen was suitable for a range of viewing environments from dark to dim or moderate ambient light. (For more on LED brightness ratings, see the ProjectorCentral article Are "LED lumens" a Real Thing?) For the X100-4K, my judgment of the appropriate image size for the brightness was close to the standard recommendation for the ANSI lumen measurement. However this subjective brightness advantage varies from one model to another. LED projectors can look brighter in dark rooms than you would expect from the ANSI lumen measurements. It supports HDR10 high dynamic range content, and ViewSonic says users will be able to add HLG, the emerging HDR standard for broadcast TV, through a future firmware update. The X100-4K is built around an RGBB LED light source, rated at 30,000 hours, and a 0.47-inch DLP chip, which uses TI's XPR fast-switch pixel shifting to put a full 3840x2160 pixels on screen. For serious enthusiasts, the relatively high floor for black level is more of an issue, but that really translates to its being a better choice for viewing in dim-to-low level ambient light rather than in a dark room. It's also easy to tweak for even more accurate color. It shares the tendency of many LED projectors to paint photorealistic images with some colors outside of a realistic range, but it doesn't do that with all of its color presets even with default settings. More important, the X100-4K delivers good enough image quality to be worth watching. The ViewSonic X100-4K, with a street price of $1,699, is one of only a few LED home theater projectors that offers both 4K UHD resolution and a brightness rating above 1,000 lumens-specifically, 1,200 ANSI lumens or a more impressive sounding 2,900 LED lumens. The black level from the ViewSonic X100-4K's LED light engine may disappoint videophiles who only watch in a dark room, but the projector delivers a highly watchable picture for dim to moderately lit environments, along with a solid-state light source that eliminates lamp replacements.
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