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. The EQ bands can be boosted or cut up to 15dB, while a gain control also offers a +/-15dB range. The effect is equipped with one 1/4'' input and output, and is powered by a 9V battery or adapter (not included).