Originally Posted by bigbadbob
Finishing office our basement theater and starting to second guess my dimensions. Looking at 130" screen with Epson 5040. First row seating at 8', second row at 14' on 6" riser and bar seating directly behind second row. Suggested projector location at 19' 10" on a 3 to 6" rod from ceiling. Actual ceiling height is 91".
1st set of corrections:
- Your best "immersive" seating position with a 130" diagonal screen (2.39:1?) would be closer to 9'6" (1:1 ratio) however since the 1st Row will be the least used, setting up the Theater for 2nd Row and Bar viewing can still make sense.
- Not sure who "suggested" 19'-10" throw. Mid-Range is 17'4" and the closest Throw is 13'...just behind the Front Row Seating.
- Setting the PJ at the closest Throw, and using a Low Profile Chief RPA Mount w/Peerless ACC570 Ceiling Plate and a 2" Threaded Nipple will put the Bottom of the Projector at approx 83". The 5040's Lens Shift will take care of everything else.
- Your Riser MUST be at least 8", and that only if the top of the Screen is placed almost to within 6" from the Ceiling/Wall junction. A 10" Riser (w/5" Step-up) would be best, as ack_bk suggested. That height leaves 80" between the Platform Riser and the Ceiling. The Projector would then be 71" above the Riser Floor....reason enough to adjust the seating so that the Projector resides above the Front Row, and does not encroach into the "Walking Height" at the forward part of the Riser.
Big question: am I going to run into issues of the projector beam hitting heads, seats, etc.? Seating for second row is HT Hamiltons. First row is just a normal u-shaped couch.
8"s for the Riser should be OK if a Couch is used, as they seldom have a rear height over 38"-40"
It would be close... and certainly more of a possibility if the PJ is placed behind the Bar area. I do not advise doing that.
Mounted instead up close, and close to the Ceiling as suggested, while placing the Bottom of a 135" 2.39:1 C.H.I Screen (52" H) at 30" off the Floor leaves you with being able to place the Top of the Screen at 9" down from the Ceiling. Of course, with the Projected Image crowding so close to the Ceiling you'll need to treat the Ceiling with a non-reflective surface of some sort. Black is not necessary....but it would have to be a very Dark Neutral Gray in a Flat Interior Enamel
Make sure the Top edge of the Bar is at least 2" above the top edge of the 2nd Row Seats (44"?) and that you have a spill-guard strip up front to prevent any spilled drinks from cascading down the back of the Necks of the viewers. Kinds puts a "damper" on the enjoyment factor.
pulling my hair out as I'm a little into the wiring, etc.
Thanks in advance for any guidance.
Oh the wiring is the easiest part! Determining your Speaker selection and placement, how much if any acoustic dampening you'll need....your lighting scheme....those are the other aspects that require more determined thought....and expense.
You didn't mention how much depth you have to work with, although having mentioned a almost 20' throw, and accounting for the depth of the 5040, you must have at minimum 22'...or very close to it. Basically, some adjustment to seating difference (moving everything back about 18") will spell out a big difference.
..and don't pull that hair! It'll disappear soon enough!