� You are using an unbalanced plug adaptor. Its pin assignments do not match the Balanced Out jack�s. Use a plug and cable corresponding to the diagram above. The amp�s Line Out is connected to the Red Box, but the signal at the Balanced Out jack is too weak: � Ensure the amp�s Line Out signal is properly connected to the Red Box�s Line In jack. The amp�s Speaker Out is connected to the Red Box but the signal at the Balanced Out jack is too powerful and is overloading the mixer/recorder�s input: � Ensure the amp�s Speaker Out signal is properly
connected to the Red Box�s Speaker In jack. The Balanced Out signal hums: � The Red Box is not receiving enough power. Check the battery or AC adaptor. � The amp and the mixer/recorder�s earth circuits have formed a ground loop. Activate your amp�s or the mixer/recorder�s ground lift switch, or use a transformer to galvanically separate the line circuit. � The connecting cable is poorly positioned and is picking up interference from a nearby source (perhaps a mains cord, transformer, etc.). Replace it with a high-quality cable and move this cord away from the noise source.
