The Chamber Orchestra of Philadelphia migrated for the first time in its own subscription series Sunday from its usual Perelman Theater quarters to the larger Verizon Hall at the Kimmel Center, and with good reason: Beethoven's Symphony No. 9. It's a piece that needs more room.
Also significant, conductor laureate Ignat Solzhenitsyn (a much-seasoned Beethovenian) returned to conduct a smaller-scale, gently provocative performance that reminded you how seldom the composer's grandest symphony is heard with fine nuances.
That, alone, was plenty to justify the event, though the Philadelphia International Festival of the Arts presented the concert as a larger commemoration of the 1989 fall of the Berlin Wall with add-ons: A good video portrait of the city by James B. Abbott and Jorge Cousineau, and not-so-good musical bonuses.