More Quad -
The Quad ESL"Many companies contributed to the first decade of high-fidelity playback. Few are still in existence. Only one made a product—the original ESL loudspeaker—that a respectable minority of well-informed people still believes set a standard for midrange coherence and transparency that has never been surpassed. That's Quad."
Quote from John "Soundbites" Marks
Wayne Picquet is the man behind “Quads Unlimited” and his attention to detail both cosmetically and sonically in his restoration of this classic speaker have earned him a position of respect in the Quad rebuilding community over the past few years.
http://www.quadesl.org/Parts/PKPanels/pkpanels.htmlhttp://www.quadesl.org/Amplifiers/amplifiers.htmlhttp://www.quadesl.org/Amplifiers/AmpList/amplist.htmlhttp://www.quadesl.org/Links/links.htmlhttp://www.quadesl.com/quad_esl63.html...and an interesting article from Stereophile:
http://www.stereophile.com/floorloudspeakers/416/