14-12 gauge will do just about any household runs, if it is on the longer side then 12 gauge should be used. I would change out the 18 gauge on the surrounds for at least 14 if not 12. 12 gauge wiring from Monoprice is quite good and very inexpensive, there really isn't much reason to not use 12 gauge at their pricing.


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70