Crutchfield Customer Review (What's this?)
Amazing quality! After looking at other options, that appeared to be small pieces of plastic I went with these and the Klipsch speakers instead. I am so glad I did. The beefy mounts allow screwing into studs, and the metal extender things are very sturdy and reach to the other joist. Once screwed in, I just bent them over the joist and installed another screw there. These are not only a good way to let the drywall installer get the hole correct, these are supporting the weight of the speaker so not all the weight is resting on the drywall. I had them installed in about 10 minutes each.
Pros: Extremely high quality.
Cons: Only works with Klipsch speakers. Not really a con unless you wanted to use these with another brand. The rep at Crutchfield told me that they will only work with Klipsch speakers. Although I have a feeling they might work with other brands as long as the diameter of the speaker is the same.