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Are there any rules of thumb / priorities how to place a module in product and route cables to obtain good EMC performance?

  • Mount the module on a metal chassis, and screw it up tight
  • Short mains cable and very short Earth cable to chassis, if Earth terminal on the AC inlet is used
  • Speaker cables should not be routed close to the primary side
  • A mains cable should not be routed close to the secondary side
  • Twist speaker cables, and keep them as short as possible
  • Keep audio cables short and use shielded cables if necessary
  • Cables should be kept away from transformers and inductors