This is the DN370, a refined version of KLARK TEKNIK's renowned DN360 graphic equalizer (GEQ). It continues to use proportional Q, where the Q width changes in conjunction with the boost/cut of each band, and features wider faders, two notch filters per channel, and variable frequency LPF/HPF. It is no longer in production. I recall the list price was around ¥200,000. I have confirmed the power on, the lighting of the buttons, and the EQ operation of all bands. Two screws are missing from the top and two from the back that secure the top cover. It doesn't seem to affect the cover's stability. Based on the fact that the distributor was EVI Audio Japan, I suspect this is a very early unit. I have performed a basic operational check, but as this is an aged analog audio device, I cannot guarantee full functionality at the buyer's location. Please purchase only if you understand this. As a protective bonus, I will ship it in a Classic Pro 4U rack case (420mm depth). Please note that I will not use an outer cardboard box for packaging.