Your speakers are that low of an impedance? Mainly easier to work with smaller wire doing that door fish you did. But since you fished that, I should be good to go! Which is good to know!Cmon, this sound will flow easier through wires
Seriously though - stock wiring is too small.
Let's do some calculations:
I = sqrt(W/R) where W - max RMS, R - speaker impedance
So, I = sqrt(300/2.5) = 10.95
According to this table:
American Wire Gauge Chart and AWG Electrical Current Load Limits table with ampacities, wire sizes, skin depth frequencies and wire breaking strengthAWG Wire size chart and ampacity table for design engineers including skin depth frequencies and tensile strength datawww.powerstream.com
Yes, I get it it's Max RMS, etc. But why worry? Not like I will be saving money by using 14Ga cable