The quartet was formed in 1948 when they made the first of their several tours of the United States under the sponsorship of Columbia Artists Management.
They made their official New York City debut in a concert at Lewisohn Stadium on June 25, 1949.
The ensemble also appeared in syndicated radio broadcasts of ABC's Piano Playhouse and made two LP recordings for the Columbia Masterworks label in 1949 and 1950.
[1][2][3][4][5] All four of the original members, Ada Kopetz, Bertha Melnik, Max Walmer, and John Scales, were trained at the Juilliard School, two of them under Alexander Siloti.
By the mid-1950s the original quartet had been replaced by Gisela Richter, Moreland Kortkamp, Emmett Vokes and Herbert Rogers, all of whom were likewise graduates of Juilliard.