I'm building my dream theater in my 2 car garage that I have been planning for 6 years or so. I have a Earthquake Cinenova 5 channel (300 Watts/Ch) and Klipsch La Scalas as the main front speakers Klipsch Heresy as center and haven't decided yet on the rear yet. I'm running wire from my equipment closet to the speaker locations in the wall and over joists etc. I have many, many feet of 12 & 14 ga. wire that I have accumulated over the years that I planned on using for this. I started reading about in-wall rated speaker wire and that put a halt to my using what I have, at least temporarily. What if I run electrical conduit to the various locations? I’m assuming that would be OK. What is the “hazard” or downside of using what I have in-wall? If I don't use what I have, what would be the best thing to use? Thanks in advance.