Clearly there is a factory making them for multiple labels as they appear to be identical to the final technology (higher end speaker manufacturer brand). ) mounts, which I also have. Both sets are excellent and offer excellent holding power. These aren't the cheapest mounts, but you definitely get what you pay for. These mounts are built to commercial standards and you won't be disappointed. I wouldn't be shocked to find such mounts in any good shop or store or commercial cinema.
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