I expect several people to warn you that it will sound terrible with ordinary wires. Personally I would not worry about it - not even one minute. 80 feet of 16 AWG will lose you about 20% power into a 4 Ohm load. Of course 12 AWG would only lose 10% power into 4 ohms. If your amp is border line then get a slightly bigger amp then you would normally use and use 8 ohm speakers that are not difficult to drive rather than 4 ohm rated speakers.
Check that the cable is UL-rated (labeled CL2 or CL3) - you can see this on the jacket if you unscrew the wall socket and examine the wires.
Check that the cable is UL-rated (labeled CL2 or CL3) - you can see this on the jacket if you unscrew the wall socket and examine the wires.