Radio became a widespread household item in the 1930s, capable of broadcasting music to large audiences over long distances. This led to the rise of big bands playing jazz in large performance halls and ballrooms to accommodate larger audiences. Pioneers like Fletcher Henderson and Benny Goodman led influential big bands that explored the instrumentation possibilities of large ensembles. Benny Goodman in particular gained massive popularity in the 1930s and 1940s, helping spark the Swing Era where big band jazz conquered global musical expression.