Finished up (for now) my rig today. Got home, plugged in, and my cab is humming. I've got hum that goes up exponentially when I turn up the gain on my amp or the Drive on my SABDDI. And it's not too noticeable with low gain, but it's there. Just changing to my distortion channel without touching anything there's a problem -- once again, not an issue at the store. It is more present on the E and A strings, on the D and G strings it isn't [as] present - pickup issues? Yes, I turned the tweeter off, no help. I took the grill off and don't notice anything too wrong (see pictures). Am I missing something here? It's not my Instrument Cable, I tried both of mine. Could be speaker cable (only have one) or my bass (once again, only have one), as well. At the store, the amp sounded fine. No buzz or hum (only thing that's the same is the amp head). Get home and there's a nice hum. Will try turning up tomorrow, but it's at a some-what constant volume from what I've tried. Turning the volume way low and the strings just vibrating from setting my bass on the stands sets off the hum, but there isn't any other noise. I tried taking a 9V battery to my Speaker Cable to make sure the speakers are in phase, and the speakers don't move - they just crackle. The 9V battery went dead after only a few tests (I took the grill off to make sure they weren't moving, and to take pictures). Would this happen from a bad Cable, a bad battery, or a bad cabinet? I think I'm done... for now. Suggest something and I'll either try it tonight or tomorrow, I want to get this fixed.