This tuning board includes a 10x preamplifier, as well as treble, midrange, bass, and volume controls. Carefully selected components include the cost-effective NE5532 op amp, high-quality small potentiometers, Black Diamond BP non-polarized coupling capacitors, 1% metal film resistors, and Philips CBB capacitors. The kit also includes an op amp IC socket, offering flexibility and easy upgrades to suit your needs. The circuit board features a well-designed layout, low noise, and an aesthetically pleasing component layout, ensuring maximum comfort for your discerning taste.