Gold CDs have a higher reflectivity and so CD players can read the data on the disc more accurately. In fact, no CD player can read the data 100% correct, Gold CDs just help to reduce error.

I have an old stereo (bought 8 years ago). Can I use it as a headphone amp by connecting a headphone to the speakers' connectors? (It is stated in the manual that the stereo should connect to speakers with a nominal impedance ranging from 8 to 16 ohms, what happen if I connect a 100 ohm...