CurtPalme.com Home Theater Forum

Larry K · Joined: 08 May 2013 Posts: 16

I'm not sure if this will work or not but I have two 75's that I am going to try on my PC just to see if they will look ok. What I would like to do is set up a system like this.

Pioneer BDP 05FD blu-Ray player to Darbie to HD Fury 4 with latest firmware to scale image output to 1920x800.48hz. to Gamma X to VGA splitter?? to both projectors.
The screen would be 108" by 45"
I realize I should probably go with two Gamma X units as each projector will likely require a different setting but that could be an addition as I have more money to throw at it.

So do you think this would work? Any insight would be greatly appreciated before I start spending money on this slightly insane project.

Thanks

Tim in Phoenix · Joined: 21 Oct 2006 Posts: 4409 Location: Phoenix

Hello

You will need green point convergence on both projectors, and if this is a side stack then some geometry settings will test the limits, such as H linearity. For side stacking, the projectors should almost touch.

**kal** · Posted: Thu Oct 24, 2013 9:03 pm Post subject:

Make sure you hushbox 'em! One XG is loud enough to require extensive hushboxing. Two would be crazy.

Kal

Larry K · Joined: 08 May 2013 Posts: 16

The stack will be over/under and I will be building a false wall with insulation and the projectors will be shooting through glass so the theatre room is isolated from the noise, that is if my test tonight shows promise. I've got one on a coffee table and I'm setting the other just above it on a folding table. I'll let you know if there's any improvement in punch but also improved sharpness being that I should be able to dial contrast back??

Larry

ecrabb · Posted: Thu Oct 24, 2013 11:43 pm Post subject:

ecrabb · Posted: Thu Oct 24, 2013 11:45 pm Post subject:

Oh, and if you stick with this setup, I'd plan on some kind of rack that you can bolt both projectors to so it's physically impossible to move one or the other. The setup on two projectors will not be lengthy and difficult, and it would SUCK to have somebody bump it and wreck a lot of hard work. A simple rack of 80/20 shouldn't be too expensive, and would keep everything nice and tight.

SC

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

benareeno · Joined: 22 Mar 2006 Posts: 1614 Location: ottawa, canada

I'd love to try a stack...it would be damn fun!

So, if you have the projectors behind a wall, won't you be sitting extremely close to a huge screen?

**Curt Palme** · Posted: Fri Oct 25, 2013 2:14 am Post subject:

Stop 'considering', just DO it! Smile

I did it with two 9500s after I came back from Cliff's place 5 years ago. Apparently you need 24 man hours to do a full setup properly. I did mine in 4-5. Smile

I just did it for fun, but Zaphod saw it, and I thought it looked amazing for the lack of time spent on it.

Do it, post pix...

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

It's been years since I've set up an XG, but... don't they have fairly limited point-convergence abilities? Cliff's G90's are awesome for a stack because they've got incredible geometry control. I remember it being hard enough to converge ONE XG, let alone trying to get TWO of 'em to agree. But maybe that was due to my lack of understanding at the time... the XG was my first projector. Embarassed

BTW Steve I think the coffee table / card table setup is a test bed to see if it works. If it does, THEN he moves it to the other room behind the glass. But yes, I would think you'd be mighty close to the screen that way...

Larry K · Joined: 08 May 2013 Posts: 16

The room is not set up yet and will only get built if I get these two units working well together and I'm happy with the results. Right now I'm sitting beside the beasts with only a 84inch wide screen. I like sitting close to the screen so I will be in front of the projectors at approximately one screen width based on the 9foot wide screen. The projectors will be setup with the lower projector inverted and hung at about 5 feet from the floor and the upper one sitting on it's feet upright on the shelf just above the lower bracket so they will be belly to belly as close together as possible. Gary, I was under the impression that XG's have one of the best point convergence control although I try not to use it unless absolutely necessary, that said, I'm not an expert by any means in setting these things up. I just muddle through and get a decent enough picture to enjoy mostly.
The biggest question I have is does my video chain plan make sense? Would all those components work and give me a decent result splitting the signal in the analog VGA state?

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

Ive taken some pics, I will post them when they upload.

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

The pics are of terrible quality and don't really show the side-shot keystone ability as good as it really is, but itll give an idea anyway. I had to stand off to the side to take the pics, which makes it even harder to tell.

Almost straight, zero keystone for reference:

V Keystone 100 under:

V Keystone 100 over:

H Keystone 100 under:

H Keystone 100 over:

Alignment menu:

Convergence menu:

ecrabb · Posted: Fri Oct 25, 2013 6:46 am Post subject:

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

Its not about what options it has, its about the FINE steps it has and the sheer number of adjustment points, that apparently the others DONT have. Its very obvious the more available points and the smaller the steps the better chance of getting it perfect.

Ive never set up a later model Sony or VDC, youre right and im not in any way claiming to know anything about them either, but ive seen so many people rave on about how great the Barco Cine 9 is compared to ALL those and ive gotta say, if that is what these people that have seen them all and set them all up think, its pretty poor compared to what NEC had back in 1992

Further more, this thread is NOT about Sony or VDC projectors, its about NEC projectors. Im quite sure they are all very capable, I never at any point stated any of those were not. Im sure you can get all of them perfect corner to corner on a standard installation with a perfectly flat screen.

Does a G90, G70, or VDC Marquee have 200 plus points of adjustment? Legit question, would like a legit answer, not interested in hearing opinions about whether or not that many points of adjustment are needed. Thumbs Up