Yes. It was terribly loud with the sound of water falling over the teeth and into the box. It was so loud that I could hear it over too my other tank when I was downstairs standing next to my standard 75g tank with a regular Durso overflow.You talking about the tideline overflow?
That’s too loud to be right in the middle of the house next to the sofa.
The exotic marine overflows from the videos I’ve seen are WAYYYY quieter to the point the only noise was from the filter socks in the sump and not the overflow