hey guys.

bought my first pedal the other day a vox v847 wah.

i didn't notice it in the shop when i played with it have because i didn't have it turned to 11, but at home when im plugged into my amp if i let the pdal sit in the toe down position, to my understanding higher frequencies it hums through my amp and i am not a fan.

is this something wrong with the pedal, normal, or something wrong with my setup.

my set-up

voxac15c1--2m planet waves cable---vox v847 wah------ 5m fender cable-------epiphone les paul standard.

thanks in advance