Grand Duo may refer to
Violin Sonata in A major, D 574 (Schubert) Sonata in C major for piano four-hands, D 812 (Schubert) Grand Duo concertant (Chopin and Franchomme), cello and piano Gran Duo Concertante, two double basses and orchestra by Bottesini Grand Duo Concertant (Weber), clarinet and piano