I have a Schecter Hellraiser 5 with two active EMG-HZ pickups, one on the bridge and one at the neck. My amp is an Ampeg B2RE and a SVT410 cab. The bridge pickup has been sounding very low with no punch for a while. This was not too much of an issue since I primarily used the neck pickup. But about two weeks ago, the other pickup began doing the same thing. I've replaced the batteries and tried a different amp/cables. I can hit the strings about the pickup and it will begin working again. Does anyone have any idea what this could be? I am fairly mechanical savvy and I think I can fix it as long as I know what it is.