MQ3600 Extremely low noise performance 30 mm VR for precise adjustment 20 Hz to 200Hz variable high pass filter Switchable boost/cut range between 6 dB and 12 dB EQ In/Out switch Center detent sliders -6 dB to +6 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 and XLR connectors The Phonic MQ 3600 is a dual channel, 31-band equalizer that offers 12 dB of cut or boost in 1/3 octave steps, with standard ISO center frequencies between 20 Hz and 20 KHz. MQ 3600 is 2-rack space unit, and accepts both 1/4" TRS phone jacks and XLR connectors.