I recently got a new laptop, and my headphones, relatively old but kinda pricy pair, crackled in left ear. The crackle was much worse on the laptop than on other devices. The cable was a bit damaged, so I resoldered a new one, but now the problem is somehow even worse. It's still barely audible on my PC and not at all on my MP3, but using them with the laptop is impossible. What could be the cause for this? I think the laptop has audio by some "Bang and Olufsen" while my PC is striaight up motherboard and the MP3 is just a tiny battery. Are the headphones getting too much power or something, resulting in the problem suddenly becoming very audible?