Gracing the 5th floor lobby of Jazz At Lincoln Center for another few months is an exhibition of the great photographer Herman Leonard, whose images of jazz musicians at work deserve the overused term “iconic.”

John Surman, a saxophonist of jazz, folk, church, and avant-garde influences, has been a longtime denizen in the ECM stable without gaining much renown. When he recently played at a New York club, leading a rhythm section of guitarist John Abercrombie, bassist Drew Gress, and drummer Jack DeJohnette, he acknowledged to the crowd that he was the only player who needed introducing.

It says something for the state of technology that, after a quarter of a century, there still is no authoritative explanation for why so many high-end audiophiles prefer tubes. Tubes not only refuse to die, they seem to be Coming back. The number of US and British firms making high-end tube equipment is growing steadily, and an increasing number of comparatively low-priced units are becoming available. There is a large market in renovated or used tube equipment—I must confess to owning a converted McIntosh MR-71 tuner—and there are even some indications that tube manufacturers are improving their reliability, although getting good tubes remains a problem.

It says something for the state of technology that, after a quarter of a century, there still is no authoritative explanation for why so many high-end audiophiles prefer tubes. Tubes not only refuse to die, they seem to be Coming back. The number of US and British firms making high-end tube equipment is growing steadily, and an increasing number of comparatively low-priced units are becoming available. There is a large market in renovated or used tube equipment—I must confess to owning a converted McIntosh MR-71 tuner—and there are even some indications that tube manufacturers are improving their reliability, although getting good tubes remains a problem.