Biamp IT-A & IT-B Isolation Transformers are designed to provide electrical isolation between audio devices, eliminating ground loops and reducing noise and interference. They are commonly used in professional audio applications to improve sound quality and system stability. The IT-A model is used for input signals, while the IT-B model is used for output signals. Both transformers feature a 1:1 turns ratio and a frequency response of 20Hz to 20kHz, making them suitable for a wide range of audio applications.