With a frequency range from 50Hz to 10kHz, the GEB-7 is ideal for any bass guitar, including 5-string basses. Seven bands of EQ are available, affording greater control over the crucial midrange.Nominal Input Level -20 dBuInput Impedance 1 M ohmsNominal Output Level -20 dBuOutput Impedance 1 k ohmsOutput Impedance 1 k ohmsResidual Noise Level -100 dBu (IHF-A, Typ.)Variable Range Equalizer Control: /- 15 dB, Level Control: /- 15 dBConnectors INPUT Jack, OUTPUT Jack, AC Adaptor Jack (DC 9 V)Power Supply DC 9 V: Dry Battery 9 V type (6F22/9 V), AC AdaptorCurrent Draw 16 mA (DC 9 V)Accessories Dry Battery 9 V type (6F22/9 V)Option AC Adaptor (PSA-Series)