Boss GEB-7 Bass Equalizer

PRECISE TONAL CONTROL
The GEB-7 is a seven-band equalizer created specifically for the frequency range of the electric bass. Since the frequency range extends down to 50Hz, the GEB-7 is also great for adjusting depth and bottom end of an upright bass with pickups.

GEB-7 Bass Equalizer
50Hz to 10kHz frequency range specifically designed for bass
Full range response, even for five- and six-string basses
Can be used as a "boost" or "cut" pedal using the level control knob
Great for eletric-acoustic bass applications
AC adaptor or 9V battery operation
BOSS five-year warranty
Nominal Input Level :  -20 dBu
Input Impedance :  1 M ohm
Nominal Output Level :  -20 dBu
Output Impedance :  1 k ohm
Recommended Load Impedance :  10 k ohm or greater
Bypass :  Buffered bypass
Controls :  Level Control knob , Equalizer Control knob 50, 120, 400, 500, 800, 4.5 k, 10 kHz , Pedal switch
Indicator : CHECK indicator (Serves also as battery check indicator)
Connectors :  INPUT jack: 1/4-inch phone type , OUTPUT jack: 1/4-inch phone type , DC IN jack
Power Supply :  Carbon-zinc battery (9 V, 6F22) , Alkaline battery (9 V, 6LR61) ,AC adaptor (PSA series: sold separately)
Current Draw :  30 mA
Expected battery life under continuous use  : Carbon: Approx. 8.5 hours  ,Alkaline: Approx. 18.5 hours  **These figures will vary depending on the actual conditions of use.
Accessories :  Owners Manual , Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTES," and "Information") , Carbon-zinc battery (9 V, 6F22)
Options (sold separately) : AC adaptor: PSA series
Width : 73 mm  2-7/8 inches
Depth : 129 mm  5-1/8 inches
Height : 59 mm  2-3/8 inches
Weight (including battery) : 400 g / 15 oz