I have a pair of Sennheiser PC360 headphones that I use with an amp to listen to music, movies, etc daily. My 50lb pitbull loves to get his legs caught in the cable and yank the headphones off my head. Today the headphones decided they'd been thrown across the room one too many times and didn't sound right anymore. The sound they produce sounds distant and echo-y, almost as if I have a cheap mixer effect for a concert hall turned on or something.
I discovered if I half-pull out the headphone plug from the jack, the volume and quality of sound return to normal but the output appears to be mono, which makes sense since I'm misaligning the connections on the plug.
I thought maybe the ground wire had come loose in the plug so I went ahead and cut it off and proceeded to wire in a new jack to the cord. Still has the exact same issue as when I started.
I just used an online audio tester which lets you play a Left channel, Right channel, and combined Left/Right channel sound clip... when I play Left-only or Right-only, the quality and volume sound fine. However when I play the Left/Right combined (center) channel, its almost as if the channels cancel each other out. It's quiet, distant. empty sound. Listening to music, sometimes the higher vocal frequencies don't come through at all. Bass is nonexistent.
Obviously this is a wiring issue since the headphones themselves sound fine when I pull the plug halfway out, what could be the issue?