Beyerdynamic Μ8 adapter, screwable headphone adapter 1/8 inch (3,5 mm) to 1/4 inch (6.35 mm). The jack adapter with M8 thread can also be used for headphones with M5 thread, but only as a plug adapter.
Toslink or Coaxial to Stereo RCA Digital Audio Converter. You can convert a digital audio signal from Toslink or coaxial to a stereo signal! Easily and quickly connect the audio source to the audio amplifier. Ideal in cases where the audio amplifier has few or no digital audio inputs.