I never said that i would recomend it if u found you had a buzzing noice comeing out through the speakers when on a gig a quick fix is to have no earth for the pc transformer im not about on takeing the earth completely out of the amps or lights just the laptop i got a one plug cable for that purpouse so no one can use it on anything else I dont use the lead any more as i have now got a groundloop isolator for my pc to take away the hum noise when laptop is plugged in to an earthed socket there available from maplins and good electrical stores