Digital equalizer 1.single 31-Band 2.RFI filtering 3.XLR ,1/4"phone ... 4.Total level:+-12dB/+-6dB Professional graphic digital equalizer1.single 31-Band 2.RFI filtering 3.XLR ,1/4"phone ... connector 4.Total level:Total level ±12dB / ±6dB1.Single 31-band equalizer2. 20mm oiled sliders with switchable range accurate constant ... 1/3 octave)11.Center frequency 20,25,31.5,40,50,63,80,100,125, 160,200,250,315,400, ...