Circuit Guitar Pre-amp TL072
This guitar pre amp
circuit has a high input impedance unbalanced and two balanced outputs completely independent set to deal high capacitive loads, and can therefore be used with long cables.
The guitar pre amp assembly does not really particular comment. The use of a type TL072 integrated circuit for the input stage is explained by the fact that it has a high input impedance (
FET input) which allows to set the input impedance of assembly to the desired value, by 1Mohm, R1.
Amplification is carried out by two separate stages to ensure a better stability and bandwidth when the gain is at its maximum. The completion of the two balanced outputs is facilitated by the use of line driver circuits specialized for this purpose in classical SSM2142.