Douk Audio EQ5 PRO 5-Band EQ Equalizer Bluetooth Receiver for Speaker/Amplifier

  
5-band EQ equalizer and preamp: separate and rich frequency band controls (100Hz / 400Hz / 800Hz / 4KHz /10KHz), each band is processed by one op amp independently. EQ5-PRO can compensate for the defects of speakers and sound field by adjusting 5-band high, middle and low frequencies, and modify various sound sources.