Should max zoom be avoided on JVC models? I’ve heard that zooming can cause artifacts.
News to me. Do you know where you might have seen that? My JVC RS400 is 10.5ft from 92" Diagonal and almost at max. No artifacts, beautiful pic. Same for prior Panasonics.
How do I determine the actual throw ratio—or equivalent screen distances? The manual is at odds with distance calculator.
I guess you would have to default to what's in manual? I noticed it does say "approximate" or something approximating that in the manual. That said they're really close and Projector central is slightly less forgiving (requiring more distance than the manual) and you're still within it's recommendation. I can't picture it (hey, a pun!) being a problem.
Leaving one foot clearance to the back wall for cabling, ventilation, & curtains puts the lens face another 18.8” away. The maximum distance from screen to lens would then be:
Throw Distance = Lroom(max) - Screen Offset(min) - Lens Offset(min)
IIRC the manual spec is just over 6" of clearance required behind and the projector is 1"6" from lens to rear. A 2ft wide shelf on the rear wall with the lens at or just overhanging the front of the shelf should work fine. That's actually good news because a shelf is going to be much less expensive and an easier install than a projector ceiling mount. Just check the weight of the PJ. Don't want that bad boy coming down.
I have about 6" clearance behind and no issue with power cord and HDMI connections. Extra power cord is zip tied behind the PJ. Have a jbox on wall just to the left of the PJ for the hdmi pass-through and electrical outlet on the wall near it.