Boombox Sound Use Of My Computer And Guitar Sound Output? Guitar Amp Or Hometheather System?

Use of my computer and guitar sound output? Guitar Amp or Hometheather System? - boombox sound

I play songs from my computer and I started to play guitar .. I can not install a home theater system and a guitar amp in my room and wondered if I my computer to connect to the RCA inputs of a guitar amp and listen to music or do I connect my guitar hometheather boombox, a system with an adapter. I have a single device. Which is better?

Thank you!