Meyer Sound Laboratories is an American company based in Berkeley, California that manufactures self-powered loudspeakers, multichannel audio show control systems, electroacoustic architecture, and audio analysis tools for the professional sound reinforcement, fixed installation, and sound recording industries. The company's emphasis on research and measurement has resulted in the issuance of dozens of patents, including for the now-standard trapezoidal loudspeaker cabinet shape. Meyer Sound has pioneered other technologies that have become standard in the audio industry, including: processor-controlled loudspeaker systems, self-powered loudspeakers, curvilinear arraying, cardioid subwoofers, and source independent measurement. Some symphony halls and performing arts facilities utilize Meyer Sound products, such as the rehearsal area at Davies Symphony Hall in San Francisco, Svetlanov Hall in Moscow, Russia, and the Musikverein in Vienna, Austria. Meyer Sound's Constellation acoustic system is used to manage outdoor sound at the New World Center in Miami, Florida, which is the headquarters for the New World Symphony. History In 1979, John and Helen Meyer established Meyer Sound to produce reliable high-fidelity products for sound reinforcement professionals. Meyer Sound's first product was the ACD/John Meyer studio monitor, based on a design Meyer developed while heading the acoustics laboratory at the Institute for Advanced Musical Studies in Switzerland. Prior to the founding of Meyer Sound, the Meyers started a relatively short-lived company named Glyph, which in part provided large speakers that were four to eight feet in diameter. However, bands were unable to bring the gigantic speakers with them when they traveled. Prior to this, John Meyer developed a sound system named "Glyph", which used said large loudspeakers. During this time period, Meyer was also involved in developing and constructing custom mixing consoles. A demonstration of the ACD system led to Meyer Sound creating a subwoofer for film director Francis Ford Coppola’s use with the custom, quadraphonic sound system that toured with the original 70 mm release of Apocalypse Now. This was the first loudspeaker to use a dedicated processing unit to provide crossover, amplitude and phase correction, along with driver protection. Also in 1979, the company developed the UM-1 UltraMonitor, which led to a long association with the band Grateful Dead. The UltraMonitor was the first product to employ a new, patented horn loudspeaker design that reduced distortion by a factor of ten compared to previous designs. This patent was the first of more than three dozen issued to the company since its founding. John Meyer was