Problems with high pass filter

[*Ace*]

I have my HPF set to 60Hz on both my amp and HU but if for example I play a 40 Hz tone it still plays through the components? Is this normal? I thought the point of a HPF was to block off the lower frequencies?

[James Bang]

keyword: slope

[Xprime4]

crossover ain't wall, more like half valleys ;)