If you are talking about a burp score its not that hard if you put some time into the build.
I was doing a 149.3 with 2 BL 15's and 3k in my truck and that was with no testing on it at all...
if you are talking about music, that may be slightly harder to do.
But to honestly answer your questions, if you take your time and build it correctly with the right power and electrical it's not really hard.