MQ3400 Extremely low noise performance 30mm VR for precise adjustment Switchable high pass filter (HPF) at 40Hz Switchable boost/cut range between 6 dB and 12 dB EQ IN/OUT switch Center detent sliders -6 to +6 dB input gain range for easy level matching Separate LED displays for HPF in, 12 dB / 6 dB range, EQ in/out, peak warning 1/4" TRS balanced inputs and outputs The Phonic MQ 3400, a dual channel 15-band equalizer, offers 12 dB of cut or boost in 2/3 octave steps, with standard ISO center frequencies between 25 Hz and 16 KHz. The MQ 3400 is a single rack space unit and is ideal for both touring and fixed PA installations.