Front speakers are quiet

Hey all. I tried searching and couldn't find anything (but I probably missed the threads). The issue that I'm having is my front speakers sound really weak. There's sound coming out of them, but even when faded fully to the front they aren't very loud. My question is: Are there seperate amps for the different channels or is it a single amp for all speakers?



This is on a 00 328Ci with the HK and business CD.



Thanks in advance