The Pro-Ject Phono Box S2 is a solid-state phono preamplifier designed to enhance the audio signal from turntables before it reaches a power amplifier or receiver. Constructed with a rugged ferrous metal casing, it provides effective magnetic shielding and contributes to its substantial weight. The device employs through-hole technology on a double-sided circuit board, making it easier for enthusiasts to modify or repair if desired. It operates using a simple diode rectifier alongside electrolytic capacitors and analog voltage regulators to create a clean +-15V supply required by operational amplifiers. The amplification and equalization involve three op-amps for each channel, ensuring low noise and dependable performance. Quality passive components are incorporated into the design, supporting its mechanical robustness. Overall, the Phono Box S2 is characterized by simplicity, effective build quality, and compatibility with various op-amps for customization, making it a reliable choice for vinyl enthusiasts.
