Pro Co IT4A Four-channel Transformer Isolation Balancer with TRS and XLR I/O ConnectorsThe Pro Co IT 4A is the perfect piece for a variety of applications where transformer floated outputs are a necessity. The IT 4A provides four channels of high quality solution for interfacing problems including being used as a direct box, breaking ground loops between balanced and un balanced lines, minimizing interference from SCR lighting dimmers, radio transmitters and 60Hz AC power wiring and more. Features True Floating Transformer Isolation for