Bloviator v.2 DC on pots

[BassXtreme]

when I turn the pots I hear that DC scratchy sound. I tested with MM and it reads 4 volts going through both pots, which is around half the supply voltage. Is this normal? I'm trying to figure out where I soldered something incorrectly. The voltage readings at the tips of the input and output jacks seem to be normal, very low millivolts.