Hi, When I first purchased my REL STRATA 5 I used a normal patch sub lead, this caused a constant buzzing in the sub, it wasn't loud but loud enough to be get noticed especially at low volumes. Then I upgraded to the QED Micro sub lead, I was pleased all the buzzing was gone. Due to the upfrade bug I ordered a Russ Andrews Sub lead which cost me £150.00 and was hoping for a improvement, when I recived it this morning inspested the cable it beautifully made, but to my horror as soon as I pluged it in it prduced a very loud buzzing, which was much louder than the patch chord used before?? Why is this happing? the cable is shieled.... Please help..