For anyone considering an Acoustically Transparent screen with the 665ES...
Definitely try samples first. I got samples from Severtson on their newest SAT-4K woven scren, old-school microperf 1.3 gain standard white vinyl screen, and older BWAT weave and put them up against my current 1.1 gain Elite non-AT screen that I'm going to replace. On 1080P material all 3 looked decent, and it was mainly just deciding on what gain was right. But on 4K HDR material- whoa. I used The Revenant and Angry Birds UHD discs to see their effects on natural lighting and artificial colors and details. Both of the woven materials massively softened the picture- much worse than setting the sharpness control to zero. The old-school microperf material was the only one that didn't destroy the 4K sharpness. The older coarser weave BWAT material held the details better than the newer, much tighter weave of the SAT-4K. You'd think it would be the opposite, but my guess is the finer the weave, the more chance a tiny 4K pixel will cross several strands of it and distort the square of the pixel, blurring them together.
I had decided to try the SAT-4K material after another thread said it was the brightest and sharpest in their woven materials testing. Honestly after seeing how badly 4K material gets softened by both of these woven materials, and the other drawbacks of the high-gain miroperf (shimmering on the slightest wrinkle, duller whites), I've never loved my old 1.1 gain Elite so much. I think I'm going to give up on speakers behind the screen due to this test. I knew AT screens were a bit of a compromise, but putting all this money into 4K resolution just to lose it in the fabric of a woven screen isn't worth it. I'd rather compromise on the audio placement a bit.
For anyone considering an AT with 4K, I'd highly recommend getting a sample of standard 1.0 normal screen to put your AT samples up against.
Sony VPL-VW665ES 4K HDR Projector | Denon AVR-X7200WA Reciever | Philips BDP7501 4K Blu-Ray Player | GoldenEar Triton One, 2+, Aeon 3, HTR-7000 ATMOS speakers