... DSP Effector one is for Invoice the other is for music instrumentsFX SERIES 4-GROUP PERFORMING MIXERSPECIFICATION: ModelFX16FX24FX32Mono Input Channel 8 ... swing & GainFrequency swing < 8%,Gain:±15dB9 Main Output ot GEQ:Center Frequency of EQ63Hz,125Hz,250Hz,500Hz,1KHz,2KHz,4KHz,8KHz ... ,WAH WAH,WAH&REV 2013 new design DJ mixer, DJ music mixer,professional DJ mixer