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