Okay, Heres a basic question for you. Eve since I started playing I have used a standard instrument cable (basiclaly the same I use to connect guitar to pedal, pedal to amp etc) to connect my head to my cab. I am since informed that these cables, while being similar in construction, are not the same and there are specific cables for connect amp and cab. This I am told can affect performance of the entire rig. Is this right? What should I be looking for?