The DN370 is a refined version of KLARK TEKNIK's renowned DN360 graphic equalizer. It continues to employ proportional Q, where the Q width changes in conjunction with the boost/cut of each band. Furthermore, it features wider faders, two notch filters per channel, and variable frequency LPF/HPF. It is currently discontinued. I recall the list price was around ¥200,000. I have confirmed the power on, the illumination of each button, and the EQ operation of all bands. I have performed a basic operational check, but as this is an aged analog audio device, I cannot guarantee complete functionality at the buyer's location. Please purchase only if you understand this point. Please check the condition in the photos before purchasing.