Here is a projection calculator for using a JVC RS520 Projector and a screen with 1.1 gain
http://www.projectorcentral.com/JVC-...ulator-pro.htm
The Studio Tek has a higher gain of 1.3 when viewed at 0 degree angle, so you have lots of latitude in throw distance and plenty of wall space. You can even have a 10 foot wide screen (thats 138 inches diagonal) and it would still work.