how can a line cord affect frequency response ?

Eldartford,

Your river analogy is very good but what happens upstream of the audio component is all very criticial. As per Ridgestreet, there is a coloration on all the rest of the chain from the foundation up; the power supply gets modulated by all other circuitry.

I used to live in an area where my electricity came from a coal fired power station; the sound was smoggy and lacked clarity. Since moving to an area with gas fired electricity the improvements are astounding....crystal clear clean sound!

If any of you have heard exotic Power Cords that made a big difference just consider what enormous improvement can be attained from having your electricity generation come from clean gas or hydroelectric rather than dirty coal! One day I intend to hook up solar panels to power my gear for that last extra step to audio nirvanna!

Dpac,

Have you tried a "swifter" - IMHO it works better than spray and wash - the ionic charge picks up all unwanted vibrations....just remember to place them on your head while listening and change the pad every hour. Chepaest acpustic treatment on the market....and a well kept secret.