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Forum: Digital Hi-End Projectors - $3,000+ USD MSRP   04-18-2016, 01:39 PM
Replies: 14,108
Views: 675,084
Posted By FoLLgoTT
Then I got you wrong. :) But from my...

Then I got you wrong. :)

But from my understanding this doesn't work, either. Please take a look at this diagram.

http://www.avsforum.com/forum/attachment.php?attachmentid=1389250

One can...
Forum: Digital Hi-End Projectors - $3,000+ USD MSRP   04-18-2016, 12:35 PM
Replies: 14,108
Views: 675,084
Posted By FoLLgoTT
Calibrating saturation is not enough to get...

Calibrating saturation is not enough to get acourate colors. Hue of the primaries differ much between BT.2020 and DCI-P3. When you put a line between white point and the primaries one notices that...
Forum: DIY Speakers and Subs   09-06-2015, 12:52 AM
Replies: 356
Views: 68,701
Posted By FoLLgoTT
This should work as long as the frequency...

This should work as long as the frequency response of the two arrays is equal. But a Linkwitz transform (biquad) can do this. E.g. MiniDSP has this feature.



All
Here comes the long awaited...
Forum: DIY Speakers and Subs   09-03-2015, 01:27 PM
Replies: 356
Views: 68,701
Posted By FoLLgoTT
I simulated a bit with alternative DBA...

I simulated a bit with alternative DBA arrangements. I think the results could be useful for people who have a door or a window in the wrong place. :)

The documentation is written in german, but I...
Forum: DIY Speakers and Subs   04-06-2015, 01:05 AM
Replies: 212
Views: 19,679
Posted By FoLLgoTT
There is not much progress. I installed the floor...

There is not much progress. I installed the floor covering. I used black PVC for the part in front of the screen and vinyl tiles with wooden decor for the riser.
And I bought LED edge profiles for...
Forum: DIY Speakers and Subs   01-15-2015, 03:48 AM
Replies: 156
Views: 8,054
Posted By FoLLgoTT
One year ago I did similar experiments with a...

One year ago I did similar experiments with a single driver and an oscilloscope. I used the results to develop my passive riser. Read the full story here...
Forum: DIY Speakers and Subs   10-30-2014, 01:38 PM
Replies: 212
Views: 19,679
Posted By FoLLgoTT
The plastic doesn't make any difference at the...

The plastic doesn't make any difference at the low frequencies. In fact it even amplifies the absorption a bit, because it acts like a membrane absorber. But for the mid's and high's the difference...
Forum: DIY Speakers and Subs   10-30-2014, 01:28 AM
Replies: 212
Views: 19,679
Posted By FoLLgoTT
Not much. Since my daughter was born there was...

Not much. Since my daughter was born there was not much progress. :(

But I had a bit time to build the second riser.
...
Forum: DIY Screen Section   08-13-2014, 08:07 AM
Replies: 26
Views: 3,040
Posted By FoLLgoTT
I use a HTPC with an AMD card. I just reduce the...

I use a HTPC with an AMD card. I just reduce the visible desktop to 1920x816. The graphics card still outputs the full 1920x1080 with black bars. This is good (compatible) for GeoBox/projector and...
Forum: DIY Screen Section   08-12-2014, 11:10 PM
Replies: 26
Views: 3,040
Posted By FoLLgoTT
Are you refering to the use of an anamorphot? I...

Are you refering to the use of an anamorphot? I don't use one and I don't know if the stretching can be done by the GeoBox. I think the geometry correction are for warping (non-flat surfaces) only.
Forum: 2.35:1 Constant Image Height Chat   07-31-2014, 12:16 AM
Replies: 29
Views: 2,924
Posted By FoLLgoTT
No, there is another way. You can correct...

No, there is another way. You can correct geometry distortion with a warping box. This image processor does the geometric correction digitally. I did it and it works great. Please take a look at my...
Forum: DIY Screen Section   07-24-2014, 05:52 AM
Replies: 26
Views: 3,040
Posted By FoLLgoTT
DVI and HDMI are compatible. You need an adapter....

DVI and HDMI are compatible. You need an adapter. But I don't know if all GeoBoxes support HDCP. It was never an issue for me since I use a HTPC.
Forum: DIY Screen Section   07-23-2014, 09:56 AM
Replies: 26
Views: 3,040
Posted By FoLLgoTT
Thanks! It was not me, but the industry! :) ...

Thanks! It was not me, but the industry! :)

Warping for curved or irregular surfaces is not a new thing at all. But I have never seen it in a home theater environment. Most people even don't know...
Forum: DIY Screen Section   07-23-2014, 01:01 AM
Replies: 26
Views: 3,040
Posted By FoLLgoTT
I forgot to mention that low cost warping boxes...

I forgot to mention that low cost warping boxes are available from VNS (http://www.vnstw.com/en/products_02.asp) (here (http://www.vnstw.com/en/download.asp) are catalogs). They have several...
Forum: DIY Screen Section   07-22-2014, 02:44 PM
Replies: 26
Views: 3,040
Posted By FoLLgoTT
No, I don't have an anamorphig lens. Warping...

No, I don't have an anamorphig lens.

Warping means geometry correction. This term is widely used in the broadcast area. Keystone correction alone is not sufficient (and barely needed at all). You...
Forum: DIY Screen Section   07-22-2014, 02:35 PM
Replies: 26
Views: 3,040
Posted By FoLLgoTT
Here...

Here (http://www.printbig.de/keder-schiene-2-kanal-aluminium.html) are a few pictures how it looks like and how the fabric is inserted. The profile itself is this:
...
Forum: DIY Screen Section   07-15-2014, 01:33 AM
Replies: 26
Views: 3,040
Posted By FoLLgoTT
Beside the great experience a curved AT screen...

Beside the great experience a curved AT screen will deliver I don't want to suppress the drawbacks.

Fabrics like the Center Stage XD offer a gain < 1. This means that the light is reflected...
Forum: DIY Screen Section   07-15-2014, 12:56 AM
Replies: 26
Views: 3,040
Posted By FoLLgoTT
I always try to reduce costs with intelligent...

I always try to reduce costs with intelligent constructions. Here is a list of the largest costs I had:

Screen: 600 €
Subwoofers + amplifier: 3500 €
Large bass absorber: 300 €
Main speakers...
Forum: DIY Screen Section   07-10-2014, 02:21 PM
Replies: 26
Views: 3,040
Posted By FoLLgoTT
Thanks! :) I calculated the curvature...

Thanks! :)



I calculated the curvature with this calculator (only in german) (http://www.arndt-bruenner.de/mathe/scripts/kreissehnen.htm). I wanted a curvature of 7%. This means the sides come...
Forum: DIY Screen Section   06-27-2014, 05:25 AM
Replies: 26
Views: 3,040
Posted By FoLLgoTT
Cool CURVED AT screen build with 2.35:1 (158" wide)

Sceen Build
For my new home theater I built a curved and acoustical transparent screen (Center Stage XD). I want to present my solution which worked very well. :)

The problem with a curved screen...
Forum: DIY Speakers and Subs   04-10-2014, 03:36 AM
Replies: 212
Views: 19,679
Posted By FoLLgoTT
Quote:Originally Posted by...

Quote:Originally Posted by Trepidati0n http://www.avsforum.com/img/forum/go_quote.gif (http://www.avsforum.com/t/1507428/follgotts-build-18-x-peerless-xxls12/180#post_24586971)

I work with...
Forum: Digital Hi-End Projectors - $3,000+ USD MSRP   04-09-2014, 10:57 PM
Replies: 78
Views: 3,081
Posted By FoLLgoTT
Quote:Originally Posted by noah...

Quote:Originally Posted by noah katz http://www.avsforum.com/img/forum/go_quote.gif...
Forum: DIY Speakers and Subs   04-09-2014, 06:47 AM
Replies: 212
Views: 19,679
Posted By FoLLgoTT
Quote:Originally Posted by...

Quote:Originally Posted by Martycool007 http://www.avsforum.com/img/forum/go_quote.gif (http://www.avsforum.com/t/1507428/follgotts-build-18-x-peerless-xxls12/180#post_24586889)

And you are sure...
Forum: DIY Speakers and Subs   04-08-2014, 02:02 PM
Replies: 212
Views: 19,679
Posted By FoLLgoTT
Quote:Originally Posted by...

Quote:Originally Posted by Martycool007 http://www.avsforum.com/img/forum/go_quote.gif (http://www.avsforum.com/t/1507428/follgotts-build-18-x-peerless-xxls12/180#post_24581764)

Do those...
Forum: DIY Speakers and Subs   04-08-2014, 04:59 AM
Replies: 212
Views: 19,679
Posted By FoLLgoTT
Quote:Originally Posted by...

Quote:Originally Posted by Martycool007 http://www.avsforum.com/img/forum/go_quote.gif (http://www.avsforum.com/t/1507428/follgotts-build-18-x-peerless-xxls12/180#post_24581674)

First, are those...
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