"Expressionist" - This is the one that has the extraordinary ability to give people impressive presentation. B-1000f that has been developed as a memorial model for 80th anniversary of our foundation is equipped with the super regulation transformer on which a flat-type copper coil is mounted uncovered and can provide enormous output of 2000 watts/1 ohm (momentary maximum) capable of responding to all types of speaker loads in order to express all of "Dynamism", "Delicacy", and "Richness" in a superior level. We have developed 4x4 structured ODNF version 2.3 that consists of 4 modules of 3-stage Darlington 4-parallel push-pull output circuit as a feedback circuit for high quality sound. B1000f is our flagship model that has been accomplished by pursuing ultimate quality with our know-how and large amount of resources and by eliminating compromise at all for improvement of sound quality as a result of comprehensively compiling commitment to "Sound" and technologies for as long as 80 years.