Switch between internal iMac speaker and headphone jack
I have a Late 2013 27" iMac that I want to hook a set of external speakers to. The two options I have are either through the headphone jack which connects to the speakers via RCA, or by BT. I think BT audio sucks so I want a hardware solution. When the cable is plugged into the headphone jack the internal speakers are bypassed even when the ext speakers are off. I want to be able to leave them plugged in and be able to switch between them and internal speakers. If I were to get a USB to headphone jack adapter such as the one below would it show as a sound output source in the sound control panel or would it still disable the internal speakers?