ITEM NAME:EQLC-5 5-Band EQ Equalizer System Acoustic Guitar Preamp Piezo Pickup LCD S L8Z8 EQLC-5 5-Band EQ Equalizer System Acoustic Guitar Preamp Piezo Pickup LCD S L8Z8 With this equalizer, you spend less time tweaking controls and more time playing. Shape sound and eliminate feedback with 5 bands of equalization. With bass, middle 1, middle 2, treble, pres control knobs. Wide frequency range from 20 HZ to 20 kHZ. Easy to read metronome on LCD display. Input impedance: 2.2MΩ Frequency response: 20 HZ - 20 kHZ Control range: Bass: +/- 12dB at 60 HZ Midd 1 : +/- 12dB at 500 kHZ Midd 2 : +/- 12dB at 600 kHZ Treble: +/- 12dB at 3 kHZ Presence: +/- 12dB at 10 kHZ