咕狗大神 : The 801 loudspeaker, taking 3 years of development, was introduced in 1979. The 801 and following 800 series are a reference standard that, in later incarnations, have been used in recording studios around the world such as Abbey Road Studios, Skywalker Sound and Sony Music Studios - NYC. They are also used by classical music labels such as Deutsche Grammophon, EMI, Philips and Decca in their studios to monitor recordings.