Bob,

Shorten that mounting pipe for the projector, which will reduce the wiggles tremendously, or do you have a beam between the PJ and screen like I do which requires a low mount?  If nothing is in the way then getting it up high will have other benefits;  less shooting in the eyes, less heads blocking the image when someone gets up, brighter image because more light reflects down to the viewing area, brighter image because less light reflecting to the ceiling, less chance of someone bumping into the PJ, and best of all, a better picture because you'd use less keystone correction, which distorts the image somewhat.

Ahh...it now makes sense. Thanks.

What about movie theater style where it's in a seperate room, shining through plexiglass or glass? Or, just build a plexiglass box around it (with ventilation of course).

Jason

Shooting through a piece of glass will eat 6% of the light output and Bob is already giving up a lot more than that with the see-thru screen (I see your speakers now on the screen only pic).

Bob,
You can probably pick up some stability by bracing those supports up above the ceiling tile and maybe a glass right triangle brace on each of the 2 front supports.  It all looks kind of wiggley.  Paint the supports all the same color at your walls for the PJ floating in the air look (at least the pair in the front).

BTW, work was done early last night, so we watched Finding Nemo with the kids.  We did the Darla scene a few times and just running  a single 100L ported 12" Shiva that is tuned to 24hz, we were getting quite a nice effect and that's probably -12db or more in the teens where the tapping really hits.  It was enough to get a little eyeball jiggling, but not the strange chest compression like in a car.  

I really think the iso loaded Dayton 15's in the box you already have and the single port making it a low tuned BR should hold you over until you're ready to get radical.  Plus the finish work is already done.  A tube for a port, bolts to clamshell the drivers, a small piece of wood to block the 2nd port, and something to seal is all you need.  Worry about HWKenstein later.

The center could go behind the screen.  Just turn the volume up for it to match.  You can also mount the PJ upside down, which can shorten the mount length by 4" and make it that much more stable.

[quote author=Bob  link=1145573673/90#99 date=1147470770]Don't think flipping the PJ upside down will give anymore vertical hieght. The lens is placed directly in the center (top to bottom). [/quote]

You did need the weekend.  You mount the PJ to the bottom of that platform and shorten the supports for same overall height of lense, but shorter supports will be more stable.

BTW,  It's good to get away from the speakers behind the screen.

With a new screen, if you can lower the top of it, then you can raise the projector.

I want to see smileys on Monday.  Do that conversion on your HWK this weekend.

With the lowered ceiling above your PJjust throw another fan in parralel with the fan on the projector.  The place that fan in the ceilign tile.  Build a box with a cut out for you lens, so just the tip sticks out.

Fan sucks heat from projector into lowered ceiling.  Movie goers are totally isolated from sound of fans.  And Pj is better braced against vibrations.

Heres a pick: (minus the walls, so you can see)



Notice the awesome fan I drew up?

Anything I have to keep cool I keep it cooler.
I tend to replace anything with a fast moving loud fan with a larger slow moving one. preferably with twice the CFM.
Nasty habit left over from Being a PC modder and overclocker.
I also undervolt the oversized fan and then add or subtract resistors to find the temp I am comfortable with.
this applies to 12 v fans. you also have to watch for keeping the voltage higher than start up voltage.
if it don't spin at 7V you need another fan to use with a lower startup voltage, as an example.

I know you can build a circuit to solve this but I am too lazy.

Blowing air in and in bigger quanitities leads to more dust unless your filtering and then you have filters to check.