I got the opportunity to hear the new Copper Harmony RCA ends myself this past week, in comparison to the standard copper Bullet connectors. Your review is spot on, and I agree with you all around on your assesment. Much faster, more attack, better extension and energy in the upper highs, and tighter bass. Midrange is a bit more open as well, in comparison to the copper Bullets. Still retains the same excellent focus as Mr. Eichmann's previous Bullet ends. Keith has a real winner with these, and the price is extremely reasonable.