So I own the ATH m50s and klipsch s4s. At first I thought my m50s were bad because they crackled during louder moments in songs especially during tom hits on the drums and held out bass hits. When I got them repaired they sent them back and said they were fine. I still get that effect sometimes and its annoying. But what I noticed is that some of my aac files are just damaged, when comparing it to hq tracks on itunes or cd. And im almost positive its not the headphones because it happens at the same points in songs and with both head phones but my m50s still seem to be sensitive to crackling. Are the m50s too powerful to be run through a laptop or ipod nano?