#simonmoon i’m not a big fan of that GR research guy. Some of his techniques like the one where he used hey antenna meter from an old receiver to show you how radio frequencies affect speaker wires was a little goofy. Here’s a Website that I think the author has more chops the good old boy Danny.
https://www.axiomaudio.com/blog/comb-filtering-popular-misconceptions/
https://www.axiomaudio.com/blog/comb-filtering-popular-misconceptions/