I have a Golf Mark 4, 1.4 3dr metalic dark green, 130k
Just made a 12" enclosed subwoofer for the boot and installed new front speakers and tweeters, with a Pioneer head unit. Plays MP3 via USB. There is two amps in the boot, fitted it myself, easy to get power lead from battery to boot via firewall and pulling off trim.
Great car, the bodywork is amazing for 2002 motor.
It has winter wheels on it, ebay alloys, amazing grip in the snow!