Not much has been said about it lately, but the digital signal going to your music signal processing and amplification device - what we in consumer audio called a receiver - is a cleaner and more reliable signal . First, the connector is less likely to break than an RCA or 1/4 inch connector, and optical cables are lighter and more flexible. Converting to a digital signal becomes cheaper with devices like this Tohilkel box. Pay particular attention to the fact that it provides a power source and must be used in conjunction with it. An optical cable is included. Recommended at this price. Put one in your audio toolkit.
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