As I tried to explain in a previous post, they don't work well for a horizontal installation. I don't think they intended it that way. The bracket mounts easily. The speakers want to pull down towards the floor due to gravity.
That's exactly right--gravity wins out They mount easily to the speaker. I'm not sure I can say that they mount easily to the wall. I think that depends on your situation. I had a tough time with mine because of the height and I had to reach above my head to tighten down ect... and that is always tough. They didn't reach to my studs either, so I had to use dry wall anchors and those never seem to work out the way they are suppose to for me. I think I ended up drilling an extra hole in the bracket for some reason--don't remember. I really think that there should be some note on the product that states that they are not intended to mount horizontilly. I'm sure they work great vertically though. It was just a blown $50 bucks and a lot of hassle trying to get them to work right.