Hello,
I offer for sale guitar active onboard preamp DiffAmp
https://analogworkshop.eu/products/diffamp/

Features:
  • Preamp is analog design,
  • Low noise op-amp on board,
  • Handmade, high quality, each preamp tested,
  • Power: 9V battery (the battery is not included),
  • Differential Gain: 24dB,
  • Low current consumption <150uA,
  • High input impedance,
  • Low noise,
  • Humming noise suppression,
  • Works with typical passive humbuckers
  • Small size: 38 x 17 x 5 mm
  • Easy installation on guitar,
  • Included: manual, battery connector, 6.3mm stereo jack (socket),
  • Ability to work with other instruments than guitars.

Made by AnalogWorkshop.eu