Preamp : 3 Band Bass Preamp GP-BP3 D by Gregory Preamps,
construction and used components. Preamp has input circuit using single, class A transistor jfet, It provides detailed sound reading from pickups. In equalizer section, high quality and low power consumption operational amplifiers were used. Preamp GP-BP3 D uses high quality polyester capacitors, in whole sound vector and filters, which give very good, natural sound.
