Commemorating the 30th anniversary of the celebrated SG2000 and SG1000, Yamaha US has released the SBG2000 and SBG1000 guitars. Both models are individually handcrafted by the highly skilled master luthiers of the Yamaha Music Craft workshop in Hamamatsu, Japan. The one new feature that has been added to the SBG series is Yamahas Initial Response Acceleration which is a Yamaha technique that accelerates the maturing process of the guitar creating tonal sweet spots and increased stability, which allows the guitar to rapidly develop its unique personality as if it has been played for years.