The BOSS GEB-7 is a 7-band equalizer designed specifically for electric bass guitars. It features a broad range of frequency settings to accommodate five-string basses and allows for the adjustment of output levels to match input sounds. The unit includes a pedal switch for on/off control and a check indicator that also serves as a battery check function.
To operate the unit, connect the INPUT jack to a bass guitar or other instrument and the OUTPUT jack to an amplifier. Power is supplied by a 9V dry battery or an optional BOSS PSA-Series AC adaptor. Inserting a plug into the INPUT jack automatically turns the unit on. Users can adjust the tone using the seven Equalizer Control Knobs and the output level using the Level Control Knob.
| Residual Noise Level | 100 dBm |
|---|---|
| Variable Range Equalizer Control | +/-15 dB |
| Level Control Range | +/-15 dB |
| Power Supply (AC) | 9V DC / 200mA |
| Current Draw | 16 mA |
| Dimensions (mm) | 70 (W) x 125 (D) x 55 (H) |
Power is turned on whenever a plug is inserted into the INPUT jack, and is turned off when the plug is disconnected.
It indicates that the battery is near exhaustion and should be replaced immediately.
The expected battery life is 12 hours for a Carbon battery, though this varies depending on actual conditions of use.