If your goal is to listen to TV output through your 2-channel system, you likely already have everything you need (except possilby a cable).
Your SmartTV, or cable/satellite receiver likely has RCA analog outputs, or digital coax/toslink outputs. If you have analog outputs (L&R RCA jacks), just plug them into an unused input on your existing system. If the TV or cable/satellite receiver doesn't have analog outputs, but has digital outputs (coax/toslink optical), buy an inexpensive DAC to go between the TV/receiver box and you current system. Use any available analog input on your existing pre-amp.
Also, your Oppo 205 has digital inputs. You can connect a digital cable (coax or toslink optical) from your TV or receiver box and use the DAC built into your Oppo 205 to perform the digital to analog conversion.
You should not need to buy anything, except whatever cable (Digital or analog) you need to connect your TV or cable/satellite receiver to your existing equipment.
Your SmartTV, or cable/satellite receiver likely has RCA analog outputs, or digital coax/toslink outputs. If you have analog outputs (L&R RCA jacks), just plug them into an unused input on your existing system. If the TV or cable/satellite receiver doesn't have analog outputs, but has digital outputs (coax/toslink optical), buy an inexpensive DAC to go between the TV/receiver box and you current system. Use any available analog input on your existing pre-amp.
Also, your Oppo 205 has digital inputs. You can connect a digital cable (coax or toslink optical) from your TV or receiver box and use the DAC built into your Oppo 205 to perform the digital to analog conversion.
You should not need to buy anything, except whatever cable (Digital or analog) you need to connect your TV or cable/satellite receiver to your existing equipment.