Effects Of Power Cords On Electrostatic Speakers

By the time the OP switched power cords his ESL's were fully charged. So naturally they sounded far better than initial turn on! Nothing to do with the power cords!

@clearthinker +1! Unfortunately there are many here that do believe in the 'good' vs. 'bad' electricity fallacy, even to the extent that one needs an 'audiophile' wall outlet for purer voltage transfer. 

@mrskeptic+1! Yes, the OP heard an improvement - but it had NOTHING to do with the power cord! ESL speakers charge their diaphragms through a 1 Million  ohm or greater resistor. This slow charging can take more than one day (24 hours). So the wrong conclusion again by the cable believers!

I use ordinary zip cord to charge my KLH Nine full-range ESL’s. Same for my Quad 57’s. The argument that "everything matters" in audio is just plain BS!

Peter Walker's discovery of the million ohm charging resistor was the breakthrough that made ESL speakers possible! Since ESL's draw so little AC current even a 22 gauge cord will work fine!

@jhnnrrs ​​​​​+1! Nice to hear a voice of reason here!

@bellemusique -1! OTL tube amps like my Julius Futterman H3aa's are uncomfortable with speaker loads below 8 ohms. ESL speakers drop to 2 ohms or less at high frequencies. OTL amps lose power and are stressed by such low impedances. So not recommended, though they are fine with the capacitive load of ESL's.

A better choice for ESL’s are regular transformer-coupled tube amps. Their output trannies provide isolation against such low impedances.

@bellemusique : I suggest you become better acquainted with technical knowledge than relying on hearsay from the "golden ears" crowd!

@clearthinker ​: what is 'low quality' electricity? Why do you say that it fills a capacitor first before 'high quality' electricity. So you've invented a new phenomenon for the "golden ears" crowd to obsess over!