Hi I have an Alembic Rogue 6 that I have been using for a few years. Recently, it developed a rather pronounced hissing sound when my Q knob is turn to the max. There is also an intermittent cracking sound when the bass is plugged in. I've tried to change batteries, opened the cavity to ensure that the quick connectors are properly fastened within the preamp. Unfortunately, this problem still persists. I've written to Alembic twice, and there has been no response from them so far. I was wondering if any one has any advice on what I can do to fix this preamp issue? Thanks for your time! 2.f.f.