The setup: Warwick Fortress One 5 (EMG pups, MEC pre) EBS-1V2 preamp Yamaha P3200 power amp (2x 440W @4Ohm) EBS 210 cab (400W @4Ohm) I use only one channel of power amp The problem: When I play my pick-ups pick up noise from the fan of the power amp (this particular model has 2 fans on the front side of the amp). This problem occurs when I'm cca 1-3ft in front and facing the amp. The noise is really noticable when I'm playing. The noise was turned down a bit when I lowered pick-ups. Does anybody know how to solve this problem?