I had dropped my laptop because my dog jumped on my lap and since then the right speaker sounded blown.
I took the afternoon of, poured a glass of cold beer and sat down with the patient. Carefully I followed the instruction on the website through my IPad. Using the tools I bought off this site, I operated on my laptop. I took it apart, realized the right speaker was shattered, replaced it and put it all back together.
It all worked out wonderfully. Do not be afraid to try to fix things yourself. Be patient, attentive and read out all the instructions before sitting down to do all the steps. It helps and you won't be surprised when everything is ripped open in front of you.
MacBook Pro 13" Retina (Late 2012-Early 2013) Right Speaker
T6 Torx Screwdriver
T5 Torx Screwdriver
P5 Pentalobe Screwdriver Retina MacBook Pro and Air
TR7 Torx Security Screwdriver
iFixit Opening Tool