Quello che dice Evan Powell su projector central non è molto incoraggiante....
There are other picture attributes to be concerned with besides brightness. Black level, detail clarity, and color uniformity, to name a few. We set up the
High Power screen side by side with
Da-lite's JKP Affinity (low gain screen), and then illuminated them both with the Optoma HD8600 1080p projector, and the Oppo BDP-83 Blu-ray player. Sitting at center viewing axis, with half of the projected image on the High Power and the other half on the Affinity, the picture quality differences are easy to describe...
First, the High Power was much brighter than the Affinity, as you'd expect. The High Power looks more like a TV, while the Affinity looks more like a commercial movie theater image. But that advantage, which is obviously quite significant in some situations, is its only advantage as far as picture quality goes.
Black levels were much more solid on the Affinity. But most surprising was the fact that the Affinity looked smoother and sharper. Despite the fact that the High Power fabric has a very smooth surface, its picture had a graininess and noise level that was entirely absent on the Affinity. From this comparison it was easy to conclude the following. If we were looking for a very bright image, and we had ambient light conditions and the ability to set up the right viewing geometry, the High Power screen is a very strong choice for that environment. The Affinity will not produce anywhere near the brilliance of the High Power under those conditions. Furthermore, if we were using a lower resolution projector than the HD8600's 1080p, the Affinity's superior ability to resolve fine detail becomes moot, and the High Power is again a worthy choice.
On the other hand,
if we can turn off the lights so that brilliance of the image is not the primary concern, then the JKP Affinity is capable of delivering a sharper, smoother, clearer image with deeper black levels. For maximum picture quality in a 1080p home theater, the Affinity wins hands down. We would never install a High Power screen in order to make our 1080p projector brighter, or to push the image size beyond what the natural lumen output of the projector is capable of.
This is exactly what a lot of inexperienced home theater buffs try to do with high gain screens, and it is usually not a good idea. It is not recommended with this one. 
