When punk godfather Lou Reed departed this mortal coil on October 13, 2013, at the age of seventy-one, he left behind a legacy of music, poetry, and good old New York City toughness. His songs and style have so influenced our concepts of “downtown,” “cool,” and “rock,” it’s as if he’s still with us. And that’s how it will feel on March 13, when his longtime partner, musician and artist Laurie Anderson, presents “Lou Reed Drones” in the Crossing at the Cathedral of St. John the Divine for five hours beginning at 6:30. The soundscape installation features more than a half dozen of Reed’s guitars, each one in front of a large amplifier; his former guitar tech and collaborator Stewart Hurwood fiddles with various knobs and dials as droning feedback noise emerges, a different emanation of Reed’s famed Metal Machine Music. We saw the piece two years ago in the Bruno Walter Auditorium at Lincoln Center, where we could lie on the floor and just let it vibrate in all our cells; it’s a dramatic piece that can take you wherever you want to go, reaching another level as it floats into St. John the Divine’s eight-second echo. (Visitors are encouraged to walk around the space to experience unique sonic perceptions.) That performance offered the bonus of additional live musicians, including Anderson on violin. Free with advance RSVP, the work is part of the exhibition “The Value of Sanctuary: Building a House without Walls,” which continues at the cathedral through June 30.