Bose is one of the largest loudspeaker manufacturers in the United States, headquartered in Massachusetts, with hundreds of engineers engaged in research and development alone, and is a wholly owned independent company. The company is a wholly owned independent company with several hundred engineers engaged in research and development alone. Its products also have outstanding performance in the fields of car audio and aerospace technology. Bose professional audio systems have been successfully used in large stadiums, multi-purpose halls, churches, high-end hotels and brand flagship stores.