The more I hear Vandersteen Audio's loudspeakers, the more I find myself admiring their relaxed, controlled, natural sound. Richard Vandersteen, the fighter pilot featured in a recent banner ad on this website, was happy to present his Quattro Signature Mk.2 ($11,700/pair). It utilizes a 6.5" mid-bass driver derived from the Vandersteen Model 5A and sounded exquisite driven by Ayre amplification.