The CYP AU-D4 Analogue Audio Converter offers simultaneous digital coaxial & optical (Toslink) outputs making it versatile for various audio setups. Whether youre connecting to a home theatre system or a professional audio rig the AU-D4 ensures your analogue audio is seamlessly converted to a digital format without any loss of quality. One of the AU-D4s key features is its ability to amplify the digital optical (Toslink) output extending it an additional five metres. This is particularly useful in larger setups where the audio source & receiver are not in close proximity. Moreover the device guarantees an electromagnetic noise-free transmission ensuring that the sound quality is pristine & uninterrupted by external interferences.