I have a Human Base X.OC5 with the Glock pre. It has recently started acting up. When the volume knob is at max, there is alot of static, and noise. If I pull the pot to the passive position, all is fine. Also when active, if I back off the volume a smidge from max, the static and crackling disappears. Yes, I've changed batteries a couple of times. It's not that. Nothing seems amiss under the hood, but that doesn't really say much. Local GC tech won't touch it. No response yet from Human Base. Any ideas?? Thanks.