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BOSS GEB-7 Bass Equalizer


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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.

  • 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 



1. What is the BOSS GEB-7 Bass Equalizer?

  • It is a 7-band equalizer pedal for bass guitars, providing precise tone control across a wide frequency range.

2. How does the GEB-7 improve my bass sound?

  • It allows you to boost or cut specific frequencies to shape your bass tone, helping you achieve a clearer, more defined sound.

3. What are the frequency ranges available on the GEB-7?

  • It features seven frequency bands: 50Hz, 120Hz, 400Hz, 500Hz, 800Hz, 4.5kHz, and 10kHz.

4. Can the GEB-7 be used with other instruments?

  • While designed for bass, it can also be used with other instruments, such as guitars and keyboards, to provide additional tone-shaping options.

5. How do I use the GEB-7 in a live performance?

  • Place it in your signal chain before your amplifier. Use it to fine-tune your tone to match the acoustics of the venue and ensure your bass cuts through the mix.

6. Can the GEB-7 be used in the studio?

  • Yes, it is perfect for studio use, allowing precise control over your bass tone during recording sessions.

7. How does the Level control work on the GEB-7?

  • The Level control allows you to adjust the overall output volume of the pedal, making it easy to match the EQ’d signal with your original signal level.

8. Can the GEB-7 help reduce unwanted noise or feedback?

  • Yes, by cutting frequencies, it can help reduce unwanted noise and feedback, especially in live settings.

9. How should I set the GEB-7 for a deep, punchy bass tone?

  • To achieve a deep, punchy bass tone, boost the lower frequencies (50Hz and 120Hz) and slightly cut the mid to high frequencies (4.5kHz and 10kHz).

10. What settings are best for a bright, cutting bass sound?

  • For a bright, cutting bass sound, boost the higher frequencies (4.5kHz and 10kHz) and adjust the lower frequencies to taste.

11. How can I use the GEB-7 to enhance my slap bass technique?

  • Boost the frequencies around 800Hz and 4.5kHz to enhance the percussive elements of slap bass, while keeping the lower frequencies (50Hz and 120Hz) balanced for a full sound.

12. Is the GEB-7 durable enough for gigging?

  • Yes, it features BOSS's renowned build quality, ensuring it can withstand frequent gigging and touring.

13. What power options are available for the GEB-7?

  • It can be powered by a 9V battery or an optional BOSS PSA-series AC adapter.

14. Can I use the GEB-7 with a pedalboard?

  • Yes, it is compatible with most pedalboards and can be easily included into your existing setup.

15. How do I reset the GEB-7 to its default settings?

  • To reset it, set all the sliders to the center position, which represents a flat EQ with no boost or cut in any frequency band.




  • 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: Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTES," and "Information"), Carbon-zinc battery (9 V, 6F22)
  • Options (sold separately): AC adaptor: PSA series

Size & Weight


  • 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

*0 dBu = 0.775 Vrms
*The specifications are subject to change without notice.


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