A good guitar booster should adapt to its position, and to the needs of the guitar and guitar player.
The ideal booster needs to reflect the Fletcher–Munson curves, because since the ear hears different frequencies at different levels, when the guitar signal is amplified it should remain pleasant and equivalent.
I decided to use a MOS-fet because the bias, impedance and sound can be altered and adapt any guitar pickup and playing style.
A prototype was created after investigating a bit some popular boosters.
(https://soundcubed.com/wp-content/uploads/2018/09/set-FET-Booster-3D-2-1024x545.jpg)
(https://soundcubed.com/wp-content/uploads/2018/09/ZZ-Final-1-768x432.jpg)
More here https://soundcubed.com/zound-zkulptor-booster/ (https://soundcubed.com/zound-zkulptor-booster/).