The Pro-Ject Phono Box is an affordable phono preamplifier designed to amplify the low-level signal generated by a turntable. It supports both Moving Magnet (MM) and Moving Coil (MC) cartridges, allowing it to be versatile for various vinyl playback setups. The Phono Box is compact and showcases a minimalist design, making it easy to integrate with existing audio equipment. It is powered through an external power supply, which helps to reduce noise and interference. The device often features adjustable gain settings, allowing users to dial in the appropriate level for their specific cartridge type, and sometimes provides a low-frequency filter to eliminate unwanted rumble. Additionally, the Phono Box typically has input and output RCA connectors, enabling straightforward connection to amplifiers and receivers. Depending on the model, specifications may include a frequency response from 20 Hz to 20 kHz, THD (Total Harmonic Distortion) well below 0.1%, and a signal-to-noise ratio of around 70 dB or more, ensuring a clear and detailed audio reproduction.
