Originally Posted by SherazNJ
Oh boy. Changing the direction is a big pain for sure. Its not only changing but also making holes and putting the holders in there. My panels are easily lower than 1 inch from ceiling. Your description of material matches mine as well. I don't know though which one is good and which one is bad. When I bought them, they came 4 panels wrapped together and each is 2x4 with 4" thickness. They are not stiff like 703 fiberglass board but not completely fluffy as well.
They should be quite a bit lower than 1" from the ceiling, 4-6" would be better for 4" panels. That is why I put the 3" ones instead of the 4" ones: leaving the gap gave virtually the same measurements, and I thought the heavier 4" ones could be used more effectively somewhere else. As it turns out, I felt the room was already getting on the verge of too "dead", so they are spares for now.
Unless your room is only 6' wide, it is much better to put the panels across as much of the room width as possible. Sound doesn't just reflect off the middle 6' wide portion of the room! I know you know that, but I'm just saying you don't need a 6' or 4' "long" first reflection absorber in between you and the front speakers, 2' "long" will do just fine when well-placed, and it's better to get the whole room width absorbing.
I doubt you hate working on the ceiling stuff more than I do! And JIC, do not use wall anchors on the ceiling, even though the odd person may suggest it, use toggle-bolts or similar. Yes they need slightly larger holes, but IMO they don't look too bad when left unused, really easy to cover over if you're fussier than I am (just hammer them in a bit, then spackle to hide).