Theodore Spiering, who had guest conducted the orchestra, was the next appointed conductor. Spiering was unable to begin his first season as conductor because of his untimely death in Munich (where he was searching for new scores for the orchestra). At the suggestion of artist manager Arthur Judson, the symphony board next appointed Dutch conductor Willem van Hoogstraten. Hoogstraten's first concert, on November 9, 1925, included Tchaikovsky's "Symphony No. 4", performed by 69 musicians. Some of van Hoogstraten's concerts were nationally broadcast on the radio. The orchestra was now recognized as one of the fifteen largest in the nation.