It was 77 degrees on October 31 and the weather on the drive down reminded me of an amplifier I once owned: dark, gray, and dry. The weather app on my phone said there were tornado warnings for the Washington, DC, area, but that could not diminish my excitement about going to Capital Audiofest at the Hilton Hotel in Rockville Maryland.

There has never been a record producer like Manfred Eicher, founder and sole proprietor of ECM records, the German-based jazz (and sometimes classical) label that celebrates its 50th anniversary this month.

Eicher doesn't quite win the all-time prize for longevity. Edward Lewis started Decca (UK) in 1929 and owned it until 1980. David Sarnoff controlled RCA from 1919–1970. William Paley did the same at Columbia from 1938-1988. But unlike those other, financially heftier titans, who deferred to department heads and studio producers, Eicher has supervised every single one of ECM's albums—more than 1600 of them.

As the 250th anniversary of the birth of Ludwig van Beethoven approaches, artists worldwide have begun issuing complete recordings of his oeuvre. At the top of a fast-growing list, three stand out: Andris Nelsons' recording of Beethoven's nine symphonies with the Wiener Philarmoniker (Decca), Igor Levit's issue of Beethoven's Complete Piano Sonatas (Sony), and the subject of this review, the Miró Quartet's 8-CD set of Beethoven's Complete String Quartets (Pentatone PTC5186827).

Austrian loudspeaker manufacturer Trenner & Friedl has a thing for coaxial drivers. They're used in at least three of the company's eight loudspeaker models, including the diminutive Sun bookshelf speaker and the large floorstanding Taliesin. In these models, T&F eschew more conventional stacked drivers for a putatively time-aligned, wide-frequency range coaxial design.