Quote: Originally Posted by G. E. Yes and we need absorption of the moving air that those resonances create. I think I get your idea and the ceiling would be a great place if it works. On the other hand absorbent in front of the steel never enhanced the bass absorption in my experience. No, it won't do anything for bass absorption, it's only for the steel plate to rest on and will of course have the effect that the high frequencies will be absorbed. Kind of like the BKA principle with the front absorbent being the hi freq absorber and spring at the same time. Quote: Originally Posted by G. E. We'll find out... Yes we will :-). Thanks for listening.