Sound good, small installation depth
No
Good columns, but there is a small nuance. Decorative lattices from the inside are not covered with white acoustic foam, but black. Because of which on a white ceiling, the grate acquires a slightly gray tint. This is true, because of the very many ceiling models I have set, for the first time. But convenient fastening of these grilles on magnets. And it is nice that there are two types of round and square in the kit.
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