Phone is not outputting through speakers anymore? topic

For some reason, my phone seems to think that I have headphones connected all the time. If i plug headphones in, I get sound through them, but once I unplug them, it still carries on as if they weren't taken out (Poweramp pauses on headset disconnect - which it isn't), I have tried rebooting and it has had no effect. I'm on Crystal PA, if that helps. I have no idea whats triggered this, Ive been using Poweramp player on all my androids for a long time, I doubt the app is causing it. The speakers are just not switching back on after the headphones have been removed.

Could this be a hardware problem?