Converting coaxial cable or Toslink digital audio signal into analog L/R audio;. 2PCS 1/8 1/4 3/8 1/2 Female-Male Pipe Thread Brass Reducing Adaptor Connector. It can convert coaxial or optical digital audio signals into left and right channel analog audio signals, and connect an external device, such as a loudspeaker, through L/R analog audio interface.
eBay