CurtPalme.com Home Theater Forum

dochlywd · Posted: Wed Sep 09, 2009 8:01 pm Post subject: STACKING ZENITH PRO1200Xs??????

Just curious as to the capabilities of stacking two Zenith Pro1200Xs. Would they be able to go side by side or would they have to go over/under?

Is there any reason (other than personal preferrence) not to stack with this model?

Thanks!

Doc

**Curt Palme** · Posted: Wed Sep 09, 2009 8:06 pm Post subject:

You need the COG cards, which I have.

Why not do it? Smile

I've never done it with them, I know the COG is somewhat limited, but I'd think you could do it.

**AnalogRocks** · Posted: Wed Sep 09, 2009 8:34 pm Post subject:

We'll need the required pictures too Wink

dochlywd · Posted: Wed Sep 09, 2009 9:34 pm Post subject:

Well.....you may have to ask GREG1292 for the pictures then! Wink

GREG1292 · Joined: 10 Oct 2006 Posts: 417 Location: indiana

Mike has me curious about doing a stack! I have a picture in the hipower screen thread and it would need to be over
under. As most of you know I have a 159" hipower screen and am extremely happy with the results.
I am trying to grasp the task at hand about the project as I have never tackled a project ot this magnitude Surprised

All advice is appreciated and is it really worth it. What do I gain besides foot lamberts is the question! Is 2
better than 1 is the question?

Thanks Greg

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

With A high power screen? you'll need sunglasses to watch a movie ! Wink

Nashou

dochlywd · Posted: Thu Sep 10, 2009 2:09 pm Post subject:

As I understand it, the major benefit is on/off contrast. You basically drastically increase your brightness but your blacks remain black. So, what were once subtle details in movies you have previously viewed, are now very distinct and the 3D effect goes through the roof. If you've ever been to Cliff's, then you know what I am talking about. In Dark Knight when they are transporting the mayor(?) and have to go underground.............MAN! The on/off was incredible and the scene just jumped out at you even though it was realatively dark!!!!!!!!!! It takes a while to adjust back to my single projector after every visit to Cliff's. There's a short period of depression but it does eventually pass! Smile

Doc

GREG1292 · Joined: 10 Oct 2006 Posts: 417 Location: indiana

I know about the 3D effect and I like it alot.
Curt if you are looking what is involed with the
COG cards and setup! Could you pm me a price so I can factor in price as well as setup options!
Do I need a VGA splitter or something with dual bnc out for the COG

90% sure I am going to do this if an over under stack will work! With my throw and screensize a 9"
machine is out of the question.

Thanks greg

SisterOfMercy · Posted: Fri Sep 11, 2009 8:35 pm Post subject:

betel · Posted: Fri Sep 11, 2009 9:09 pm Post subject:

Greg, the BG808 I delivered to you for your friend has a COG card in it.

GREG1292 · Joined: 10 Oct 2006 Posts: 417 Location: indiana

Betel That is right! I am still wanting to know if an over under setup will work. The 1200x hipower thread has a picture of how I could mount. I just need to know if it will work! The HD215 lenses have such a short throw it's the only way I could get such a large picture 159" for my setup with 99% raster use!

dochlywd · Posted: Fri Sep 11, 2009 9:51 pm Post subject:

Greg,

I think the over under positioning is the easiest to accomplish. Where the real challenge, in the electronic convergence controls, is when doing a side by side. Some of the machines don't have enough range or type of adjustment to pull it off. One of the GURUs should chime in her soon. Hopefully, Craig R. will read this thread. He should know. Or Nashou knows a great deal as well. Oh yeah, there's also some guy named Curt that might be able to shed some light.

Doc

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

For side by side you need to have top and bottom keystone, if not its impossible to do a side by side, with the marquee ultras you can, not sure about the Zenith
if it has that control. But top bottom is easy, I had one ceiling and one floor, for you if you could build a rack to put them both in it be best to get them as close together as possible.

Athnaasios

GREG1292 · Joined: 10 Oct 2006 Posts: 417 Location: indiana

The Zenith have top,bottom,and left and right keystone adjustment. Why is the convergence on green needed? Does it sink both projectors to one calibration screen Question

dochlywd · Posted: Fri Sep 11, 2009 10:42 pm Post subject:

Good question. I would like to know as well.

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

Ok COG is the same as the service menu convergence for green in a marquee I assume. So when stacking you first need to get both Green grids perfect before you do anything else with red and blue. And no two Pj's are alike , even the same make and model when it come to exact geometry being displayed from a the same source. you could tun on one PJ and converge it so the edges are perfct to the screen edges, turn it off and do the other one the same , but when you turn them both on the grids are not lined up. this is where you need COG to get both greens perfect, or to straighten out a stray grid line where the other geometry controls wont help. so you need both to have it or at least one and use the one without COG as the base green grid. Very Happy

Nashou

GREG1292 · Joined: 10 Oct 2006 Posts: 417 Location: indiana

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

GREG1292 · Joined: 10 Oct 2006 Posts: 417 Location: indiana

I think I am the proud owner of a second Zenith 1200X Very Happy

So Curt if you are around I Need a price on a COG card!

TbX · Joined: 06 May 2006 Posts: 94 Location: Sweden

my experience of stacking suggests that you need horizontal linearity board for at least one of the projectors

without it you will go out of range with cog

//TbX