The Boss GE-7B design is very similar to the GE-7 but the frequency bands are optimized for bass guitar. The bands have center frequencies at 62Hz, 125Hz, 250Hz, 500Hz, 1kHz, 2kHz and 4Khz. There is also a level control that allows each band to be adjusted by +/- 15db.
Product Specification:
Controls: 7 Band Graphic Equalizer + level control
Connectors: Input, Output, AC Adapter
Current Draw: 16 mA (DC 9V)
Input Impedance: 470 kOhm
Residual Noise Level: Less than -100dBm (IHF-A)
Recommended Load Impedance: 10kOhm or greater
Equalizer: 62 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4kHz
Level Control: +/-15 dB per band
Recommended AC Adapter: ACA Series