Signal Flex Cable tester - checks all your cables - microphone, speaker, instrument, balanced and patch cables. Tests for shorts, open and proper phase. Accepts all connectors - XLR male/female, 1/4” mono/stereo & RCA phone. 9V battery. Features...

The Hum Eliminator™ is designed to eliminate 60 cycle hum (60Hz AC signal) caused by Ground Loops. It is also designed to convert unbalanced lines to a true balanced lines.