Originally Posted by PanteraGSTK
How are your black levels with that screen? That was my main reason for going the grey screen route. I'm going to pick up some fabric today to see what I can find. The projected image on my wall has terrible black levels, but that is to be expected from a cream colored wall with texture.
I'm not John P, but there are other things that will affect your black levels.
First, and this is a biggie: The room. It's it all white/light colored walls/ceiling/floors? That will reflect a lot of light back on the screen killing your black level. It's even worse if there's a wall/ceiling/floor close to your screen. The further your projected image is from other nearby reflective surfaces, the better. This is why many here go with darker HT rooms. You might of noticed that your room 'lights up' with the PJ image? That's all reflective light, and it's bouncing back onto your screen.
If you have a side wall that is closer to the edge of the screen than the other side, try to center the screen more (if you can), that will help a little by moving the closest reflective surface further away. Same thing for the ceiling/floor, try to aim for the mid-point (if possible).
Make sure you're in low lamp mode, and you've calibrated your bright/contrast, AND you have a reference blu ray movie to gauge black levels by.
You mentioned a 120" screen? At that size, you're black levels should be ok, but no where close to JVC levels of course. It's all relative. Also, you're lamp is NEW? It's very bright then, after about 100hrs (and even up to 200-300hrs) the lamp will settle in more. That means it will be not quite as bright, and your black levels will be better. Don't forget to recalibrate! This is why you don't pick/chose a screen/gain for a PJ with a NEW lamp, you always calculate it for a lamp that has worn in a little, otherwise you might end up too dim at the 500-1000hr mark.