It's obvious that you have not heard a good custom system. A good custom system for a BMW is around 2 to 3000 bucks and it has to be install by professional audio installer to make sure everything fit right, most components have to be custom made to fit perfect. Techno and trance music don't have good bass... try some hip hop if you want to test your system.ilovebmw said:dude i dont see the fuss about hk it's a kick ass system get it. Why would you want to go and spend like a 1000 bucks on a system. Trust me i play all those technos and trances with the bass and it kicks azz! Everyone is amazed that it bumps like this.