its really crazy how the different frequencies feel. Justins blazer is pretty crazy, you feel yourself moving so much and its pretty violent. but idk if i would classify it as painful per say. the lower frequencies arent as painful as they are violent is what im trying to say. when i sat in brian butlers ranger, 149 db @ 48-50 hz it was more painful to me. it choked me out and made my whole head tingle. i think woofer placement has something to do with it as well. i think of my setup as more violent then painful but it gives me the same kinda tingly feeling in the 35-40 range. so id say ==> Violent<35 hz<Painful. i realize ill prolly get bombed on for something like that, but its a very general statement of what i have observed.