@atlvalet id be less skeptical if one of these charlatans had the conviction to post before and after videos so we could A/B the difference. And not a bunch of useless graphs like Danny. Actually A/B the before and after with various songs in a controlled test. I also have no idea what obvious horn resonance you are referring to. If it’s so obvious please try and isolate the sound and share with the group. Im sure the guys at Klipsch would also appreciate this discovery.
As for things like “cheap Chinese” caps and crossover components, it’s the same rationale as generic cable vs pricey esoteric stuff, if the cheaper components do the job there isn’t much need to pay up, aside from placating a small, fickle group of audiophiles.
Sorry if I come across harsh but I’m just so sick of people pushing snake oil without proper blind testing. So many of the ideas revolve around cognitive dissonance and reviewer bias and lack actual merit. Klipsch has literally been making Cornwalls since 1959 and horn speakers since the 40’s, and not a single model uses sound deadening material on the horns. Yet Im supposed to take your word for it, because some other guy said it was a good idea? Hard pass, I’d rather listen to them as they were engineered to sound.