Hi, I finally joined the 21st Century and got my first laptop. I've had my G4 connected to my stereo for years. 1/8" stereo mini in the headphone jack to my old Marantz (there's a 1/8" to RCA slitter at the stereo). Yesterday I set up my new system and plugging in my jack to the MBP everything worked fine. Then I noticed if I jiggle it, or barely even touch the cord moving it ever so slightly, there are loud crackling pops and depending on if it goes back into position perfectly or not there may be a buzzing. It sounds like a loose jack would sound but i KNOW my MBP doesn't have a loose jack. The cable is fine too. I'm not worried about the cable being 'heavy' or pulling on the jack. I feel the jack will be okay. But does it heard the internal circuitry (the obvious results of the crackling?). Does anyone experience issues like this with their MBP?