11. How to use K9 Pro optical, coaxial, and line input?
1. The use of coaxial and optical fiber is similar. After power on, switch [INPUT] to the corresponding indicator optical fiber (OPT) and coaxial (AX)
2. Input settings, connect the coaxial or optical fiber cable to the corresponding input port
3. Output settings, switch to the corresponding output, connect headphones to realize the decoding function of K9 Pro
The FiiO player uses coaxial output. Please pay attention to use the coaxial adapter cable, change the PO output to SPDIF, and change SPDIF to D2P.