Notice that the above poster returned the amp due to the fact he heard audible noise. The A50+ uses a unique TI amp chip (TPA3116) but I question that was the cause of the noise as the TPA3116 can measure really nicely. As observed I don't hear audible noise https://canvas-bag82493.dm-blog.com/36084132/the-fact-about-sculpture-that-no-one-is-suggesting