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GBP3 3-Band Bass Preamp

GBP3 – 3-band preamp designed for use with passive pickups. Key features include:

  • Bass: 40Hz +/-18dB
  • Treble: 6.5kHz +/-18dB
  • Middle: 400Hz/600Hz/800Hz +/-12dB
  • Frequency switching via microswitch or 3-position mini switch
  • 5m Fender cable emulation mode

Specifications:

  • Input impedance: 1MΩ (ideal for various pickups)
  • Power supply: 9V/18V (18V adds +6dB Headroom)
  • Current consumption: 2mA-9V / 2.5mA-18V
  • Dimensions: 28mm x 33mm x 15mm

Potentiometers / Switch: Set 1

  • Volume Push-Pull Active/Passive
  • Balance
  • Treble
  • Middle
  • Bass
  • Miniswitch 400/600/800Hz

GBP3 3-Band Bass Preamp

GBP3 – 3-band preamp designed for use with passive pickups. Key features include:

  • Bass: 40Hz +/-18dB
  • Treble: 6.5kHz +/-18dB
  • Middle: 400Hz/600Hz/800Hz +/-12dB
  • Frequency switching via microswitch or 3-position mini switch
  • 5m Fender cable emulation mode

Specifications:

  • Input impedance: 1MΩ (ideal for various pickups)
  • Power supply: 9V/18V (18V adds +6dB Headroom)
  • Current consumption: 2mA-9V / 2.5mA-18V
  • Dimensions: 28mm x 33mm x 15mm

Potentiometers / Switch: Set 2

  • Volume Push-Pull Active/Passive
  • Balance
  • Middle
  • Treble/Bass (Stack)
  • Miniswitch 400/600/800Hz

GBP3 3-Band Bass Preamp

GBP3 – 3-band preamp designed for use with passive pickups. Key features include:

  • Bass: 40Hz +/-18dB
  • Treble: 6.5kHz +/-18dB
  • Middle: 400Hz/600Hz/800Hz +/-12dB
  • Frequency switching via microswitch or 3-position mini switch
  • 5m Fender cable emulation mode

Specifications:

  • Input impedance: 1MΩ (ideal for various pickups)
  • Power supply: 9V/18V (18V adds +6dB Headroom)
  • Current consumption: 2mA-9V / 2.5mA-18V
  • Dimensions: 28mm x 33mm x 15mm

Potentiometers / Switch: Set 3

  • Volume
  • Balance
  • Middle
  • Treble/Bass (Stack)
  • Miniswitch 400/600/800Hz
  • Miniswitch Active/Passive

GBP3 3-Band Bass Preamp

GBP3 – 3-band preamp designed for use with passive pickups. Key features include:

  • Bass: 40Hz +/-18dB
  • Treble: 6.5kHz +/-18dB
  • Middle: 400Hz/600Hz/800Hz +/-12dB
  • Frequency switching via microswitch or 3-position mini switch
  • 5m Fender cable emulation mode

Specifications:

  • Input impedance: 1MΩ (ideal for various pickups)
  • Power supply: 9V/18V (18V adds +6dB Headroom)
  • Current consumption: 2mA-9V / 2.5mA-18V
  • Dimensions: 28mm x 33mm x 15mm

Potentiometers / Switch: Set 4

  • Volume Neck/Bridge (Stack)
  • Middle
  • Treble/Bass (Stack)
  • Miniswitch 400/600/800Hz
  • Miniswitch Active/Passive

💡 If you don’t find the setup you need, we’ll create it just for you :)!

How to order



📦 Order Sets Directly from Us

Want to place an order? Just drop us an email at or use our contact form.

The preamp is available in three different options, tailored to your needs:

  • 1. Preamp with a full wiring diagram in PDF format.
  • 2. Preamp with a complete set of potentiometers and switches, along with a detailed wiring diagram in PDF format.
  • 3. Full preamp installation – a custom option including a project designed to offer the best solutions for your bass. A solder-free option is also available, featuring screw terminals that allow for easy installation without a soldering iron for pickups, the output jack, and the battery. Connection instructions and wiring diagram in PDF format are included.