Looking for 4 speaker mounts for my JBL n24's. I do not have the originals that came with the speakers. One problem I have is that the wall plate for one of the front speakers is very close to the corner so I don't have alot of room. I'm hoping the speaker mounts will enable me to "tilt" the speaker away from the corner. Anyway, I saw these and they seem OK. Any other mounts that you all would recommend? Also how can I tell if the mounts will fit my speakers? Are they a "universal" size? Thanks.