This Hi-Fi Preamplifier with on Board Gain Selector, Volume control & regulated power supply comes with all the necessary components installed & Tested, and what customers only need to do is to connect and play. The key to this design is flexibility and simplicity, and the PCB has been designed with these primary considerations in mind. It integrates TI’s high-performance TL072 chip, is one of the best Low-Noise JFET-Input Operational Amplifiers. This Pre-Amplifier is having two stages one is Buffer Stage and Second is Gain Stage, By which performance is warm and detail. Coming to components 1% Metal film resistors, Audio grade Nichicon capacitors & High-quality Vishay/ Epcos Film capacitors are used to gain the perfect timber.