Quoted from Robotoes:yeah. that. and even at 1.5A per pin, plus probably another 1 - 1.5 for the tv/stereo, you're getting kinda close.
just put in a 20A breaker, super simple. I'm gonna bet the wiring is probably rated for it anyway (but you should check).
Not likely. 15a breaker = 14 wire. 20a breaker = 12 wire. Don't mess around with that.