To ascertain whether your audio device accommodates RCA or Coaxial connections, examine the back or sides of the device for connection ports. Typically, RCA ports are color-coded (often red and white or red and black). Come in pairs for audio purposes. On the other hand, coaxial ports are usually singular and may be labeled as "Digital Coax" or "SPDIF." Additionally, consulting the user manual of your device can provide information regarding its supported connections.