I really don't know where to post this, so here it goes. I just baught an SX SPJ-62 from rondo, I love it and its a great bass but, when I take my hand off the strings I get ome major feedback and it only goes away when I touch the bridge or strings. Though what really scares me is, say I play an open E, and let it ring out. I get loud, repetitive crackles from my tweeter. Is this just a grounding issue on my bass, or is it the cabinet?