CurtPalme.com Home Theater Forum

ecrabb · Posted: Wed Oct 15, 2014 6:41 am Post subject:

**Curt Palme** · Posted: Wed Oct 15, 2014 1:41 pm Post subject:

Yes. the XD. I'm sure it will be fine.

What I'm seeing now is random drifting of small areas of convergence. I thought at first that it was H linearity shift on one projector, but not so. This is what is happening. What I need to do now is narrow down which set is doing it, by marking the screen with painters tape.

Also noticed is that the 'bending' of the lines as per the below pix are global, in other words it's raster changing, the convergence on both sets is solid.

Annoying as heck! I'll be doing some board swaps, as I've seen a tiny bit of shaking from the one projector as well.

I did throw in the second Onkyo lower end (505) receiver last night. it doesn't upscale, so I fed the output of the rx to the Lumagen, then upscaled to 1080p, then to the projector. Worked fine, and I tweaked the convergence a bit. Looks fantastic generally speaking, and considering I haven't done any color balancing save by eye.

hansilili · Joined: 09 Mar 2007 Posts: 302 Location: Köln, Germany

redfox001 · Joined: 16 Mar 2009 Posts: 2257 Location: The Netherlands

I would guess that it is something in the smpts2 the power for the convergence because it is only in the middle so not the horizontal deflection but it is all three colours so not on the convergence board but still convergence.

**Curt Palme** · Posted: Thu Oct 16, 2014 1:54 pm Post subject:

Yes, first I need to figure out which set it is! Smile

Was watching it last night, and there's very slight drift overall. Funny, if I sold either set, they would be perfect, but overlapping, nope, Houston, we have a problem.

Even so, I marvel every time I turn the system on how natural looking they are. I keep walking into Costco every couple of weeks, and I have to say, their displayed LED sets look like crap!

Spanky Ham · Joined: 22 Mar 2006 Posts: 5643 Location: Comedy Central

Crap!!! That is inflammatory! Shocked

I agree. Not much into the flat panels. That being said the LG OLEDs look really good. I think the 55" is down to $2500. For that price, it isn't a bad option.

**Curt Palme** · Posted: Thu Oct 16, 2014 3:38 pm Post subject:

It's all about the sharpness and color for me. Were I doing super high end CAD stuff, no question I'd go digital. I see people in the dead of winter though looking like they stepped off the boat from Hawaii for a month, and details that I can't see normally by eye, and that's all wrong to me!

Spanky Ham · Joined: 22 Mar 2006 Posts: 5643 Location: Comedy Central

Didn't you say you liked the OLEDs last year at Cedia?

**Curt Palme** · Posted: Thu Oct 16, 2014 3:48 pm Post subject:

I think so, but it's an unproven technology, isn't it? WHo knows if the Organic in OLED isn't going to sprout roots in 5-6 years? Smile

**Curt Palme** · Posted: Fri Oct 17, 2014 10:38 pm Post subject:

A long tube has arrived from the US. 8' long, 11' wide. Very Happy

Barb is busy researching fabric for the sound absorbing panels.

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

paw · Joined: 08 Mar 2006 Posts: 1176 Location: Arvada, CO

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

Hell, you can breathe through a towel. It'll cut out all the high freqs though.

ElTopo · Joined: 07 Nov 2006 Posts: 1640

Curt,

could you measure fL when everything is setuped to your new screen ?

Would be very interesting who much light output the stack gives.

My single one (calibrated) gets about 7-8 so with two you meet the specs 14-16 fL.

ElTopo

**Curt Palme** · Posted: Sun Oct 19, 2014 4:55 pm Post subject:

The sound absorbing material needs to be flat black, and it doesn't really matter how much it absorbs, I'm not using it for screen material. It struck me the other day that I'll simply cover the entire ceiling in black cloth covered panels. Some will have insulation behind them, some will not, as others have said that a too-dead room sounds bad.

I've got a sound installation and a trade show to do in the next couple of weeks, so I don't think any more will be done to the room, unless the receiver I got from Mac comes in. I'll take a night off to install that for sure.

Am still considering the Integra receiver for down the road, but I'll try the Pioneer first.

Stack held up well through two movies last night. It seems that the slight misalignment as shown in the pix above keeps reoccurring , but in the same areas of the screen, which is weird. I'll have to put tape on the screen and mark each projector test pattern, to see which one is drifting. Then the board swapping starts.

**Curt Palme** · Posted: Thu Oct 23, 2014 1:46 am Post subject:

So I may have found some surround speakers. While at Innovative Audio, buying some vintage audio stuff to fix, the owner showed me a palletful of dipole surround speakers out of commercial theaters. The price is right, the cabinets are dark gray, the only downside is they are pretty damn big, as they are 8" 3 way.

I think though if I keep them up at the ceiling level, the 16" or so that they stick out isn't going to be an issue. Any downside to going to commercial grade dipole speakers? I don't see any at this point..

hansilili · Joined: 09 Mar 2007 Posts: 302 Location: Köln, Germany

Spanky Ham · Joined: 22 Mar 2006 Posts: 5643 Location: Comedy Central

It is mostly preference, but I would only use dipoles if I were real close to the speakers.

**Curt Palme** · Posted: Fri Oct 24, 2014 3:11 pm Post subject:

Interesting, totally counter to the responses I would have expected. OK, maybe I'll pass on them, but the price is right. Smile

mr_ro_co · Joined: 08 May 2006 Posts: 1643 Location: Santa Fe NM

I prefer dipoles. Good dipole speakers, when the listener is in their null region, are hard to localize, which I think is a good characteristic for surrounds. With "point source" (actually a misnomer - very few speakers are actual point sources), the speaker is easier to localize, which for me calls too much attention to the speaker, and not the "space" that the surround effect should map to. That said, a 7.1 speaker setup with surrounds physically oriented for more of a reflected soundfield instead of aimed right at the audience, and with gain set so they aren't too loud - that also works well.

I also agree with Spanky that if the seating location is very near the surrounds, a dipole is preferable, precisely because of the localization issue.

Steve