connecting MacBook Pro to external speakers
I have in-wall speakers in my house connected to an amplifier. The amplifier has RCA jacks on it's 'input' port. How do I connect my MacBook Pro to it so that I can play iTunes or Internet based music/talk radio thru the house speakers?
MacBook Pro (Retina, 15-inch, Early 2013), macOS High Sierra (10.13.4)