The F-1-8XLR-TX/RX is the HIFI professional audio optical transceiver with 3-PIN XLR interface, performs high-quality 1 to 8-ch HIFI audio transmission over an optical line. Fiber Optic Transmitter High Quality audio signals are converted to digital signals and then converted to optical signals for transmission. Fiber Optic Receiver does the photoelectric conversion from modulated light signal to the analog XLR signal output. Used for professional and extremely high-quality audio transmission over the fiber.