and my reply was nerdy nitpicking. because we can! ^_^ I like considering weird situations TBH. so long as you don't try to take that model as evidence of what is right for normal listening like a certain someone, please go ahead and let's be nerds. the quarter wavelength idea about resonance is obviously a recurrent event with waves and stuff to bounce off of or make vibrate. the basic idea is the same but I was thinking of absorption specifically. my doubts were about those wedges, not the general principle. their geometry being pretty special and all, I suddenly felt very unsure ^_^. it turns out that it's apparently and sort of logically a rule that also applies to those long wedges. the material shakes with the wave, which results in a lot of the energy absorbed/converted into heat(everything ends up as heat anyway... no future!). and my concern for lower freqs turns out to be justified in this case too. now that I've done some fact checking, I can pretend that I knew I was right all along . did you check if it's an audiophile one?