Mark O’Connor, Maggie O'Connor, The Vega Quartet at Zankel Hall

Mark O’Connor, Maggie O'Connor, The Vega Quartet at Zankel Hall

Mark O’Connor, Maggie O'Connor, The Vega Quartet at Carnegie's Zankel HallApril 25. 7:30PM. $60. The husband and wife fiddle team of Mark and Maggie O’Connor play everything from Beethoven to bluegrass. In fact, their concert program, done with the Vega String Quartet, is called “Beethoven and Bluegrass.” For decades, Mark O’Connor has moved easily between the world’s of American folk music and the Western classical canon; his Appalachian-themed…