New MacBook, need some help.

Alright, I'm still having some trouble with my external speakers, hell actually anything in my Audio in port. I hooked my speakers up and got nothing, internal speakers on my MacBook would work fine when I had my external speakers hooked up. I was told to try some headphones just to see if that would work but still nothing. Do I have to bring it back?

Seriously, it hasn't even been three days and if I have to bring it back I'd be a bit pissed off. Is there anything I can do to get it working? Anyone have this problem? Or am I simply just plugging it in to the wrong port and my external speakers are suppose to be hooked up via the Headphone out port? Does that act as the out port for my external speakers as well?

 

Yeah, just figured that out. I'm just used to the PC with headphones meaning headphones only (no speakers). So yeah, I feel like and idiot but oh well lol. **** happens lol.