The Altec Services Company purchased the bankrupt Lansing Manufacturing Company and melded the two names, forming the Altec Lansing Corporation on May 1, 1941. The first Altec Lansing power amplifier, Model 142B, was produced that same year. James Bullough Lansing worked for Altec Lansing, then in 1946 he left to found the James B. Lansing Company (JBL), another manufacturer of high-quality professional loudspeakers, which competed with Altec Lansing. Altec Lansing produced a line of professional and high-fidelity audio equipment, starting with a line of horn-based loudspeaker systems. First developed for use in motion-picture theaters, these products were touted for their fidelity, efficiency and high sound-level capability. Products included "biflex" speakers (where frequency range was increased by a flexible "decoupling" of a small center area of the speaker's cone from a larger "woofer" area) and the 604-series of coaxial speakers (which employed a high-efficiency compression driver mounted to the rear of the 604's low-frequency magnet, and exited through a multicellular horn that passed through center of the woofer's cone).