It is bass guitar electronics with an active three-point equalizer and active volume control.

The heart of the system is the low-noise TL062 dual operational amplifier. The functionality of the preamplifier is in line with the design known from MusicMan guitars, while the miniature dimensions of the PCB allow it to be used in many other bass guitars.

The potentiometers are connected to the PCB with JST XHP-3 connectors. This solution allows for easier assembly and disassembly of the guitar device, allows for quick replacement of any potentiometer without soldering, and additionally allows the user to choose potentiometers of any manufacturer - each will fit after adding a connecting cable, provided that the electrical parameters are consistent.

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),

 >   Potentiometers: VOL, BASS, MID, TREBLE

 >   High input impedance, suitable for electromagnetic transducers,

 >   Low noise,

 >   Easy installation on guitar,

 >   PCB dimensions: 25x52mm,

 >   Included: manual, battery connector, 6.3mm stereo jack (socket), connection wires, potentiometers.