In 1959, Crown began making standalone tube power amplifiers. The Crown DC300, introduced in 1967, helped define the era of modern power amplifiers In 1953, Crown added a line of compact loudspeakers as accessories to the reel to reel tape recorders. In 1949, Moore obtained a groundbreaking patent, the first tape recorder with a built-in power amplifier for public address duties, which was introduced in 1950.

In 1947, Clarence and Ruby Moore began by modifying existing makes and models of tape recorders to make them more rugged. In June, 2018, Harman International shut down the Crown International headquarters in Elkhart, IN and moved manufacturing to Mexico in an effort to consolidate resources. Following Crown International's acquisition by Harman International, additional offices were set up in Northridge, Los Angeles, California, where AKG Acoustics, another Harman company, maintains its North American headquarters. The radio frequency broadcast division was subsequently repurchased by descendants of Clarence Moore who restructured the division in order to continue the manufacture of broadcast transmitters and RF amplifiers using Moore's original firm name: 'International Radio & Electronics Corporation'. In March, 2000, Crown International was acquired by Harman International as their primary supplier of audio power amplifiers. The plant was rebuilt, and D-60 amplifier production was brought back on line within six weeks. US$1 million of uninsured assets were lost. Ī fire destroyed 60% of the Crown facility on Thanksgiving Day 1971 and rendered much of the remaining building severely damaged. In 1975, the company's name was changed to Crown International, Inc., as voted by the stockholders. In the 1960s, the company's name was changed to 'Crown International', as suggested by Moore's wife and co-founder, Ruby, as she felt the name 'International Radio and Electronics Corporation' was too long, and because the emblem on many of their tape recorders was a crown.

A converted chicken coop served as the first manufacturing facility. The company started out building rugged, open reel tape recorders for use by missionaries in far off parts of the world. International Radio and Electronics Corporation (IREC) was established in 1947 by Clarence C.

Crown logo design