ART T8 8-Channel Transformer Isolator ART8The T8 (Transformer Eight) from ART is a high quality, totally passive audio interface, housed in a rack mount chassis, that uses eight transformers to separate input and output signal grounds, thereby isolating any two systems and reducing hum and ground loop noise. The unit's audio transformers have flat and wide frequency response and handle high signal levels while maintaining an isolated balanced output. This gives the T8 a very clean and neutral