I just bought my Spider IV 15 and an annoying sound is appearing in the background. This only happens when i Open my Channel Volume.When i used my headphones with the amp the sound was heard too and i don't think the cable is the problem.Can it be that i messed up a preset or something.The sound appears on every preset getting louder and more distorted as i go from clean to insane.When the cable is connected to the amplifier(without the guitar) the sound is heard too.
Any help is appreciated.