Using proprietary technology, the GH1 Ground Hound creates an isolated ground connection for any effect unit that is powered off the PA9 Power-All. Avoid ground loops, reduce line noise, and finally be able to power pedals with opposing ground configurations off the same series power supply! The Ground Hound allows Fuzz Face and ToneBender style fuzzes and other positive-ground pedals to work in conjunction with standard negative-ground pedals off the same power supply. The GH1 can also reduce noise from certain digital units with multiple ground planes.