[1] Kaplan has performed in all the principal cities of Europe, including London, Berlin, Paris, Vienna, Prague, Zürich, Amsterdam, Copenhagen and Milan, as well as the Far East and Australia.
He has collaborated with many of the world's foremost conductors, among them Ormandy, Tennstedt, Maazel, Ashkenazi, Dutoit, Bychkov, Conlon, Ivan Fischer, Foster, Gatti, Masur, Rattle, Robertson, Salonen, Semkov, Skrowaczewski, Slatkin and Zinman; and has appeared regularly at festivals such as Aspen, Blossom, Chautauqua, Grant Park, Ravinia, Saratoga and Wolf Trap.
Kaplan has also maintained a flourishing international career since his European debut in 1975 when he was asked on short notice to substitute for Pinchas Zuckerman, playing the Bartók Concerto in Cologne under the baton of Lawrence Foster.
In subsequent seasons he has made highly acclaimed concerto and recital appearances in all the musical centers of Europe – London, Berlin, Paris, Vienna, Prague, Zurich, Amsterdam, Copenhagen and Milan – as well as in Australia, New Zealand, Malaysia, Hong Kong and Singapore.
Prior to that he performed and recorded extensively for two decades in the Golub-Kaplan-Carr trio, with cellist Colin Carr and the late pianist David Golub.