I used these to mount Sonos speakers for a surround sound system. Installation was relatively easy. The price seemed reasonable at the time of purchase, but the value for money is very low since it degrades the sound quality. The instruments hum a little (it's very annoying and distracting) for lower bass frequencies. I tried several times to tighten them but to no avail. I'm not sure what I'm going to do to fix this issue, but I wouldn't recommend this product.
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