Before revision: Ordinary lamp cord has a capacitance of 10–20 pF per foot, plus a few picofarads of stray capacitance, so a 50-foot run (100 total feet of conductor) will have less than 1 percent capacitive loss in the audible range .
After revision: Ordinary lamp cord has a capacitance of 10–20 pF per foot, plus a few picofarads of stray capacitance, so a 100-foot run (200(100*20 = 2000 pF, and 2000 pF < 2700 pF) total feet of conductor) will have less than 1 percent capacitive loss in the audible range .