Save your money! If you don't have much electronics background, ask someone who does. Ask them how a 3 or 6 foot powercord can possibly make a difference with regards to your wall's Romex wiring, lines to the power transformer, miles upon miles of KV lines routed through switching yards, and onto the generating stations. Where's all the tech wiring there? Don't buy into the placebo snake-oil. If unsure, obtain several "free" cords and visually test their results yourself. There's NO difference!