Is there a device that acts like a wireless headphone extension "cord"? A little black box that has 2.5mm plug that plugs into a stereo system + a second little black box that has a socket that I can plug my headphones into. I know there are wireless headphones but I want to be able to use my own headphones and play mp3s from my PC on my hi-hi. Also why is the sound quality so shit with wireless headphones. If wireless headphones - if music can be broadcast so well on FM why can't it be transmitted across my lounge?