Back at the beginning of 2017, Greg Roberts, of Volti Audio, devised a clever way to bring his Rival floorstanders up to my penthouse pad, for what resulted in a rave review of those horn-loaded wunderspeakers.

I live on the top floor of a seven-story, elevatorless building on a busy street in Greenwich Village. A vertical challenge? No problem! Roberts is resourceful in many things, from speaker design to his former profession, the building of custom homes. Affixing a pair of unguent-saturated straps to the screws on each side of a Rival, we lifted and transported the 106-lb speaker high in the gritty Manhattan sky as if it were child's play.

On the second morning of a recent audio show, I walked into the exhibit room of Bricasti Design.

"How about some Mahler?" asked cofounder and designer Brian Zolner.

"Oh God. Not at 10am!"

Twenty-five years after the premiere of John Adams' Violin Concerto, the music remains as vital, exhilarating, and strangely moving as the day it was birthed. An extremely demanding work, its three contrasting movements present a triathlon challenge of sorts to anyone who dares try to play them.

Here, she who rises to the challenge is violinist Leila Josefowicz. Provocatively pictured on the CD cover as a curious cross between an athlete in repose and Rodin's reflective thinker...