I have a 2008 Kenwood KDC-MP338. I live in southern California and i get stations like 92.3, 93.5, 1059, etc. Each of these stations would start static a different day. like for example. 92.3 will play fine, but 93.5 would have static. Then like the next day it would be the opposite. This happened after i got my alpine spr speakers installed from a stereo shop. I want to figure this out myself though(me doing the work, not the stereo guy.) Most of the stations dont static, however all those fm stations mentioned had no static at all prior to this. What can it be?