It's my first post here, so please excuse me if I sound inexperienced. I have owned a pair of PSB M4U2 headphones for a few months now. Unfortunately, the jack to jack stopped working today (playing one ear only). The company do give you a spare, but mine is at home (as well as the receipt), and I'm at uni. When I tried using my friend's cable, the headphones played out of both ears, but only on passive mode. They wouldn't play when I set the headphones to active amplification. So I was wondering if there were any 3.5-3.5mm cables that you guys know of that would definitely work with active amplification?